SCALA. 



221 



Leach. Acionea, Desk. Cyclostoma, Schum., not Lam. 

 Turbina, Browne. Scalatarius, Burner. 



Ex. S. lamellosa, Lamarck, pi. 23, fig. 8. Opercu- 

 lum, S. clathrus, LinncBUS, fig. 8, «, 8, b. Shell, S. sca- 

 laris, LiniKBUS, fig. 8, c. 



The animal exudes a purple fluid wheia molested; 

 nearly one hundred species have been described, chiefly 

 from the Eastera Seas ; China and the Philippines, how- 

 ever, harbour the greatest number; five species are in- 

 habitants of the British Isles. 



Species of Scala. 



aciculina, Hinds. 

 aculeata, Sow. 

 alata, Sow. 

 albolineata, Sow. 

 ambigua, Linn. 

 aurita, Sow. 

 bulbulus, Soiv. 

 bullata, Sow. 

 Catanuensis, Sow. 

 concinna, Sow. 

 crassa, Sow. 

 creberrima, Hinds. 

 curvilineata, Soiv. 

 denticulata, Soiv. 

 clubia, Sow. 

 Elenensis, Sow. 

 Essingtoniensis, Gray. 

 eximia, Adams and Reeve. 

 fasciata, Sow. 

 fragilis, Hanley. 

 friabilis, Sow. 

 Georgettina, Kien. 

 glabrata, Hinds. 

 gracilenta, Say. 

 gracilis, Soiv. 



gradata, Hinds. 



immaculata, Sow. 



imperialis, Sow. 



incouspicua, Sow. 



indistincta, Soiv. 



irregularis, Sow. 



lactea, Krauss. 



laxata, Sow. 



ligata, C. B. Adams. 



lineata, Say. 



liueolata, Kien. 



maculosa, Adams and Reeve. 



marmorata, Sow. 



Mindoroensis, Soiv. 



mitrseformis, Sow. 



multicostata, Sow. 



multilirata. Say. 



muricata, Kien. 



neglecta, Adams and Reeve. 



Novangliae, Couth. 



obesa, Sow. 



obliqua, Sow. 



obtusa, Sow. 



Pallasii, Sow. 



Philippinarum, Sow. 



