46& Zoological Society. PROCEEDINGS OF LEARNED SOCIETIES. ZOOLOGICAL SOCIETY. July 11, 1843. — Lovell Reeve, Esq., in the Chair. " Descriptions of new species of Nucula, from the collections of Sir Edward Belcher, C.B., and Hugh Cuming, Esq.," by Mr. Hinds, were read. Nucula Cumingii. Nuc. testd ellipticd, tenui, epidermide virente indutd, antice abbreviatd, suhrostratd, postice elongatd, rotundatd ; margine ventrali acuto, antice suhemarginato, dorsali postico, pro-minulo ; car dine antice dentihus 6, postice 19-20. Long. 11; lat. 4 ; alt. 7| lin. Hab. The Asiatic analogue of N. obliqua, and is widely diffused over the seas of the Indian Archipelago. It has been obtained at New Guinea; Straits of Macassar; Bolinao, San Nicholas, Sual and Bassey in the Philippines ; Singapore ; and Straits of Malacca ; in a depth of water varying from seven to twenty-three fathoms, on a floor of mud and sandy mud. Cab. Belcher et Cuming. It is distinguished from N. obliqua by the disposition to rostration of the anterior limb, prominent dorsal margin, slight indentation at the anterior part of the ventral margin, and larger size. Nucula mitralis. Nuc. testd conoidali, soUduld, epidermide fused indutd, antice brevissime abbreviatd, rectd; margine dorsali posticd inclinatd, marginibus ventralibus crenulatis; cardine antice dentibus 10, postice 28-30. Long. 5^ ; lat. 3 ; alt. 4 lin. Hab. Straits of Malacca ; from seventeen fathoms, mud. Cab. Belcher. The very contracted and straight anterior margin of this shell gives it the shape of a mitre, or other similar elevated head-dress. Nucula pulchra. Nuc. testd ellipticd, solidd, sulcatd, interstitiis transversim striatis ; marginibus ventralibus crenulatis; cardine antice dentibus 9, postice 27-29. Long. 7 ; lat. 4 ; alt. 5^ lin. Hab. L'Agulhas Bank, Cape of Good Hope ; from seventy fathoms. Cab. Belcher. Nucula divaricata. Nuc. testd ellipticd, antic^ ewcavatd, subacu-minatd, postice rotundatd ; lineis divaricatis, striatd ; marginibus ventralibus crenulatis ; cardine antice dentibus 7, postice 22-24. Long. 5 ; lat. 2| ; alt. 4 lin. Hab. China Sea; from eighty-four fathoms. Cab. Belcher. A single valve only was brought up from this great depth, and presents a character in its sculpture which has not hitherto been met with in any recent species, but which is also found in the fol-lowing. This peculiarity consists of the presence of lines diverging from an angle near the middle of each valve. It however occurs in an English fossil, N. Cobboldice. Nucula castrensis. Nuc. testd ellipticd, antic^ rotundatd, epider-mide olivaced indutd; lineis divaricatis j marginibus ventralibus
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