413 



but not very prominent shoulder, and passing from it to the rature 

 diagonally, so as to leave a broad, lubtruncated, triangular brown 

 ipace at the base of both elytra, including the scuteLLum; tin- black 

 space extends to before the middle, it- bind edge i- waved, a large 

 pale testaceous irregular patch is included in it, arising from lateral 

 edge, bnt not extending to the suture; it i- of a pale yellowish silky 

 white, and its well-defined edge makes the contrast with the black 

 background singularly pleasing; behind the middle of each elytron 

 is an oval black patch, not extending to the suture, and at some 

 distance from the tip it has another white ,-ilkv spot, well-defined ; 

 the elytra are somewhat truncated at the tip, the outer point of 

 truncature being slightly apiculated ; the hind margins of the abdo- 

 men beneath are edged with lighter-coloured pile. 



A distinct species of the genus Cereopsis, whose aame has been 

 changed by Mr. Pascoe to Cereoptiua, that it may not be confounded 

 with Latham's Cere-billed Goose from New Holland Cereopms. 

 •\s Mr. Pascoe has changed the name, I retain his modification, QOt 

 because I deem it necessary. The strong and long first joints of the 

 antennae, placed near each other at the base, and separated by a 

 notch, are well-marked ; they are of a rich brownish-red colour. 



3. First Steps towards a Monograph of the C^ecidi . \ 

 Family of Rostriferous Gasteropoda. By Philip P. 

 Carpenter. 



History of the Gi'onp. 



The remarkable Mollusks here described long escaped observa- 

 tion, from their extreme minuteness. The Dentalium minutum of 

 Linn. (ed. 12, no. 12G4), described as from t hi' Mediterranean, "testa 

 tain parva, ut genus nisi armatis oculis nnn eon-piciatur," ma\ pos- 

 sibly be the Broc.hinu glabra, as supposed by Hani. (F. & II- Brit. 

 Moll. vol. iii. p. 1*1), though the same author prefer- assigning 

 it to the young of Ditrupa gadiu in his Ips. Linn. Conch, p. 139. 

 This is also supposed by Milne-Edwards (Lam. An. 8. Vert rol. r. 

 p. 599, no. 21). According to Dr. Fleming, "none of the -In II- 

 of this genus were known to Linnaeus. Mr. Boys discovered the 

 Ccecum imperfbratum, which was inserted by Mr. Walker in the 

 genus Dentalium" 



The British species, supposed to he three in number, were described 

 Dentclia) by Montague, 1803, and by other writer- on native 

 -hells; hut Dr. Fleming was the first to point out their generic pe- 

 culiarities. In the Edinburgh Encyclopaedia, I817 s article M Con- 

 chology," he characterize d Cm,,,, ;( - "Shell tubular, cylindrical, sub- 

 arcuated, undivided, and closed at the apex." This he placed between 

 Dentalium and Serpula, a- the 5th genus ot hi- Order I. Univalves, 

 Division I. Unilocula, citing three species, C.imptrforatumitrmche* 

 and glabrum. In hi- ' Philosophy of Zoology ,' 1822, he altered the 



