ZOOLOGY. 



259 



Shell conyohite ; aperture narrow, withoot a beak ; cola* 

 ■mella phiitsd. Plate 5, fig. 23» This geoas is composed 

 of ii\e families; * aperture entire; s'lhcylin' 

 dricalj emargiiiate ; oval^ eiFase, emarginate ; "^^^^ 

 fusiform^ or spindle shaped ; veniricose^ spire 



papiliiary at the top. 



This is a very GxtcnsiYa genuSj the greater pr?Tt of which 

 are natives of the tropical seas, and are orJj found on the 

 shores after storms ; but fevy kinds fire Europea^jj and these 

 do not possess any great degree of beauty, whilst the tropical 

 kinds are amongst the most beautiful of the whole tribe. 



24. Biiccmum. Whelk. Inhahlto-iit a. Limax. 



Shell spiral, gibbous ; aperture oval, terminatiag ie a short 

 canal Incliniiig to the rlgJit^ with a short beak ; interior 

 lip flattened. Plate 5, fig. 24. This genus is divided 

 into eight families ; * hijiated^ rounded, thin, nearly 

 transparent, brittle ; with a short exerted re- 

 Jlected beak^ lip unarmed outvv^ardly ; *** outer 

 lip prickly on the hinder m^rsia, in other respects cor- 

 responding with the preceding; Columella lip 

 dilated and thickened ; Columella lip ^ as if worn 

 flat ; sjnooih^ not included in the preceding divi- 

 sion ; ■^-^<****^- angular^ not previously included • 

 -x-x-K--x--K- x-'X--:<- laperiiig, awl shaped and smooth. 



Most of this genus arc found adiiering to rocks or stones, 

 beneath the surface cf the ocean, but some few aro terrene 



s 2 



