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Show 1877.] COLLECTION MADE BY H.M.S. ' PETEREL.' 69 8. ARGYRIOSUS SETIPINNIS (Mitch.). Charles Island (Post- Office Bay). 9. IlEMiRAMPHUSUNiFASCiATUs(Ranz.). Charles Island(Post- Office Bay). This is one of the fishes which appear to extend within the tropics almost round the globe; hitherto it has not been brought from the West coast of Africa. 10. CLUPEA LIBERTATIS (Gthr.). Charles Island (Post-Office Bay). 11. TETRODON HERALDI (Gthr.). Charles Island (Post-Office Bay). 12. BALISTES MITIS (Benn.). Charles Island (Post-Office Bay). IV. MOLLUSCA. By EDGAR SMITH. The shells collected by Commander Cookson are all from Charles Island. They belong to twenty-two species, the majority of which were previously known to have been found in the archipelago, though we were ignorant in some instances of the island on which they had been obtained. Six of the species are additions to this fauna, three of them being apparently undescribed. A. Marine Species. 1. PURPURA PATULA, Linn. Both the normal form of the species and the variety (P. columellaris, Lamarck) occur at Charles Island. Some of the typical specimens with thin lips have the spire quite elevated, indeed quite as much so as certain of the variety with the thickened and strongly dentate labrum. One of the latter form is quite a curiosity, on account of its diminutive size and solidity, being only an inch in length and yet quite adult. 2. PURPURA CALLAOENSIS, Gray. The single specimen from Charles Island differs from all Peruvian examples I have seen in having four stout lirations within the aperture, which do not reach to the margin of the labrum ; and the four transverse ridges which usually encircle the body-whorl of this species are very well developed. The specimens in the Cumingian collection are stated to have come from the Galapagos Islands, according to a ticket preserved with them ; but Reeve quotes Callao Bay as the home of the species. 3. ENGINA CROCOSTOMA, Reeve. This species has been found at Panama; and the Philippine Islands were given by its author as the habitat. |