CHAPTER Xll. 



GENERA AND SPECIES, 



THE distinctions between the genera having been given, we 

 have here only such particulars as are needful for the 

 identification of the species. In the concluding chapter the 

 species will be arranged alphabetically. The dimensions are 

 those of full-grown, well-developed examples. They do not in 

 all cases agree with the illustrations, as most of the figures in 

 the coloured plates were drawn from shells in the writer's 

 possession, so as to give a better idea than usual of the sort of 

 specimens a collector will meet with in an ordinary way. Where 

 two dimensions are given, the first is the length. 



Acera. (BULLIDJE}. Plate xxx. 

 568. biillata, ijin.xf in. whorls 6, ridged at the top. 



Achatina. (STENOGYRID&.} Plate xx. 



312. acicula, Jin. x^ in. whorls 5^, compressed and drawn out, 

 rapidly increasing in size. 



Acicula. (ACICULID&). Plate xxiii. 

 398. lincitta, Ji n - outer lip thin ; inner lip spread. 



Aclis (SCALARIIDM}. Plate xxii. 

 369. gulsonte, 3*7 in. x^ in. whorls 6 or 7, shell smooth. 



366. ascaris, ^ in. x^ in. whorls 8 or 9, shell ridged. 

 365. unica, % in. x-^ in. whorls 9 or 10, shell reticulated. 

 368. walleri, in.x^ in. whorls 10, shell smooth. 



367, supranitida,m. x^in. whorls 12, shell smooth or ridged. 



Actseon. (ACTION ID JE). Plate xxx. 



colour pir 

 body whorl. 



Actaeonia. (LIMAPONTIID&.) Plate xxxi 



550. tornatilis, f in. x in. colour pink, with three white bands on the 



'he 



corrugata, % in. head keeled at the sides. 



cocksii, in. head with a central black stripe. 



106 



