GENERA AND SPECIES. 115 



Clausilla. (PUPID^E.} Plate xx. 



Margin of clausilium notched 



304. biplicata, f in. 2 folds on pillar, shell streaked. 



305. laminata, f in. 3 or 4 folds on pillar, shell smooth. 



Margin of clausilium entire 



306. rolphii, J in. 4 or 5 folds on pillar, shell fusiform and 



streaked. 



307. rugosa, J in. 3 folds on pillar, shell streaked. 



308. parvula, in. 3 folds on pillar, shell smooth. 



309. solida, i in. shell very narrow, tooth more than half 



across mouth. 



Of 305 there are two varieties pellucida, which is more transparent, and albfda, which 

 is greenish white. Among the varieties of 307 are alftida, which is greenish white ; 

 everetti, which is small ; gracilia, which is long and slender ; tumidula, which is short and 

 stout ; dubia^ which is large and stout ; and dextrorsa, which has a dextral spire. 



Clio. (CA VOLINIID&.) Plate xxx. 



584. pyr ami data, in. 5 ridges in front and one at the back. 



Clione. (CLIONID^.} Plate xxx. 



585. limacina, i in. no shell ; head distinct ; gills external. 



Cochlicopa. (PUPID^E.) Plate xx. 



310. lubrica, J in. mouth without teeth or folds, 



311. tridens, Jin. mouth with teeth and folds. 



There are five varieties of 310 hyalina, whicr s greenish white ; Inbricoides^ which is 

 small arid slender; viridnla, which is also small and slender, and is greenish white \fusca, 

 which is brown ; and ovata, which is oval and has a shorter spire. Of 311 there is only one 

 variety crystalline which is greenish and transparent. 



Columbella. (COLUMBELLID^E.) Plate xxvi. 



511. haliaeti, Jin. whorls 8, outer lip furrowed inside, spire 



turreted. 



512. nassa, J in. whorls 5, outer lip smooth, spire tapering 



and not turreted. 



Corbula. (MYIDM.) Plate xii. 



146. gibba, % in. colour yellowish or brownish white. 



There is a variety rosea which has a purple streak on each side of the beaks. 



Crenella. (MYTILID&.) Plate ii. 



24. rhombea, Jin. x in. shell with from 12 to 15 transverse plates. 



25. decussata> J in. x^ in. shell with 40 to 50 transverse striae. 



