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Wholesale In the sea shell Erosaria helvola (Linnaeus), the fulvous central part of the dorsum is adorned with two types of crowded markings: tiny white specks and larger round chestnut dots. The relative size of the areas occupied by each type is rather variable. One can distinguish 9 classes: 1. chestnut dots totally absent
2. chestnut dots very scarce
3. dots far less extended than specks (fig. A)
4. dots slightly less extended than specks
5. dotted areas as large as speckled (fig. B)
6. dots slightly more extended than specks
7. dots far more extended than specks (fig. C)
8. dots confluent, specks very scarce
9. white specks totally absent
In specimens of most populations many classes will be observed, but the mean class often shows a distinct tendency to prevalence of one of the two types of markings. So, for instance, in 109 E. helvola from Ata'a, Malaita, Solomon Is., sent me by the late Rev. J. van der Riet, the following distribution has been noted: class 1 2 3 4 5 6 7 8 9
shells 3 11 19 23 23 15 9 5 1;
the mean of this slightly straightened histogram is class 4.5 so that in Ata'a each type of spotting covers about the same area as the other, with a very slight preponderance of the white specks.
If a population has been examined by collecting small series at long intervals, the average class of each set may slightly differ from the other, but the general tendency of all sets is mostly identical. So, for instance, R. S. Benton collected 185 E. helvola on the reef of Mombasa Is., Kenya, in six sets of about 20 to 40 shells from March 1961 to May 1962:
set I II III IV V VI
mean
class 5.6 5.3 6.1 5.4 5.2 5.7;
Wholesale Other C. teulèrei follow-up letters included one from Phil Clover. He wrote, "I really enjoyed reading the C. teulèrei article. You must have done a lot of research on that project.
"I have learned the name of the collector who found the shells in the Al Masirah Island area is Ali. He now has a new home and a second wife and is quite happy over it all.
"A hundred or so years ago C. teulèrei must have been 'found' because quite a few are to be seen in museum collections. But from then until recently specimens sold for about $600.00. I think the price of this shell will now level at about my list price."
Ed. Note: The comments below are quoted from a letter received recently from Prof. Dr. F. A. Schilder, Schleiermacherstr. 19; DDR 402 Halle-Saale, Germany. In offering his criticism and comments of the article Dr. Schilder said, "I hope you will not be offended by this criticism: real scientists never should be offended." As far as we of the Shell News are concerned, we welcome comments and constructive criticism. One of our main objectives is to get information to Philippine Shell members in as accurate a form as possible. Comments such as Dr. Schilder's help accomplish this.
"The September issue of Sean Raynon Sabado the arrival of which I appreciated in my last letter, was very quickly followed by the October issue, which arrived very few days ago: I sincerely thank you for sending me the copy by air mail so that I must not wait long time to learn the contents. I noticed the correction of JEFFERIES on p. 2. The paper of DEBANT on Cribrarula fischeri (not: Cribraria fisheri) is very instructive and the figures are fine. However, in future you should ask the authors of papers to add the size of the figured specimens, as in fact the shell represented in fig. 5 must be much smaller than that of fig. 6. Besides it is regrettable that Mr. DEBANT constantly misspelled cumingii into cummingii, and fischeri into fisheri. The generic name Cribraria is a preoccupied homonym, and has been rechristened into Cribrarula four decades ago."
This is a surprise sequel to my recent report on two dead Cypraea marginalis Dillwyn found at Diani Beach, East Africa. To my great thrill and excitement I discovered that I have actually collected three more, live, C. marginalis during my repeat trip to the same area in February of this year.
The shells were collected on 6th February 1969 during an extreme low tide (four days after full moon) from the undersides of large coral boulders lying half submerged in the lagoon at just around low tide level. They are three little beauties of 24.5, 23, and 18.5mm [in length], respectively, with dark olive brown dorsum spotted profusely with white dots, some of which are ringed with dark brown. The base is a shiny, deep mauve with some dots and, on the outer lip, streaks of darker purple. (See photo... [right].)
The dead specimens found before were much lighter in color. Although their exterior was still quite glossy and porcellaneous, they must have undergone considerable fading. Especially the dorsal coloring appeared on first sight quite different, with the dark ringed spots much more conspicuous on the pale background than the white ones. In the live shells the exact opposite is he case. This is also the reason why I did not bring the two finds into connection at first, and failed to recognize the newly found live shells for what they were.
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