Zoological Society, 469 



crenulatis ; car dine antic"^ dentibus 5, postic^ 11. Long. 3 ; lat. 

 li; alt. 2 lin. 

 Hab. Sitka, North-west America. A single specimen was dredged 

 in the harbour, from seven fathoms, sand. 

 Cab. Belcher. 



NucuLA TUMID A. Nuc. tcstd elUpticd, tumidd, striatd; marginibus 

 ventralibus integerrimis ; cardine antice dentibus 6, postice 15; 

 intils leviter striatd. Long. 4^ ; lat. 2^ ; alt. 3^ lin. 

 Hab. Straits of Malacca ; from seventeen fathoms, among mud. 

 Cab. Belcher. 



NucuLA MARMOREA. Nuc. testd elUpticd, soliduldy albidd, sulcatd; 

 liris ad angulum planulatis ; latere antico brevi, subacuminato ; 

 marginibus ventralibus minute crenulatis. Long. 2^ ; lat. 1 ; alt. 

 If lin. 

 Hab. Straits of Malacca ; from seventeen fathoms, in society with 

 N. tumida. 

 Cab. Belcher. 



NucuLA DECLivis. Nuc. tcstd parvd, oblique elUpticd, soUduld, epi- 

 dermide tenui, fused indutd ; latere antico brevi ; margine dorsali 

 longe inclinato, ventralibus crenulatis. Long. 2 ; lat. H; alt 1 JKn. 



Hab. ? 



Cab. Belcher. 



A still more oblique shell than N. pisum, to which it is closely 

 allied. 



NucuLA NANA. Nuc. tcstd minimd, trig ono- elUpticd, Icevigatd, ni- 

 tidd ; marginibus ventralibus minutissime crenulatis ; cardine antice 

 dentibus 5, postice 11 ; umbonibus fuscis. Long. 1 ; lat. ^ ; alt. § 

 lin. 

 Hab. Cagayan, island of Mindanao, Philippines ; from twenty-five 

 fathoms, among coarse sand. 

 Cab. Cuming. 



NucuLA Belcheri. Nuc. testd politd, oblongd, sulcatd, anticl 

 elongatd, truncatd, angulatd; ab umbone biangulatd, tertio inter- 

 media minori ; dentibus numerosis, serierum ambarum numero sub- 

 (Squall ; margine ventrali subrecto . Long. 12 ; lat. 3J; alt. 5|lin. 

 Hab. L'Agulhas Bank, Cape of Good Hope ; dredged from a depth 

 of forty to fifty-four fathoms. 

 Cab. Belcher. 



NucuLA SEROTINA. Nuc. tcstdpoUtd, oblongd, sulcatd, antice elon^ 

 gatd, rotundatd, ab umbone angulatd ; margine dorsali antico sub- 

 prominulo ; umbonibus elevatis. Long. 6 ; lat. 2 ; alt. 3 lin. 

 Hab. Singapore ; from seven fathoms, mud. 

 Cab. Cuming. 



This closely resembles a fossil from the Sutton crag. The latter 

 is a larger shell, of somewhat different proportions, and wants the 

 rounded anterior slope of the recent species. 



NucuLA TENELLA. Nuc. tcstd oblongd, Icevigatd, tenui, planulatd, 

 anticl elongatd, rotundatd; umbonibus parvis. Long. 4§ ; lat. 1 J ; 

 alt. 2 J lin. 



