140 



POPULAK CONCHOLOGY. 



Delphinula laciniata. 



horny within, on the outside shelly. Animal like that of 

 Trochus, but without frontal lobes between the feelers, 

 instead of which the head has on each side, near the eye, 

 a cone-shaped lobe. — 6 species ; also fossil. 



Curious little shells from the Cape, India, Australia, &c. 



Delphintjla. Lam. (Delphinus Montf. ; Cyclostoma 

 Gray, not Lam.) — Shell very strong 

 and thick, often but loosely rolled up ; 

 spire depressed ; umbilicus large ; ex- 

 terior rough, with tubercles ; aperture 

 round and pearly; lips united; oper- 

 culum horny, or shelly (doubtful). 

 Animal not differing essentially (according to Quoy and 

 Gaimard) from Turbo and Trochus, but without frontal 

 lobes, or side filaments. — 27 species*; also fossil. 



All the species forming this genus, of which there are 

 some very beautiful, and others highly curious, are found 

 in the Indian Ocean, on reefs, at low water. Some of 

 them have the whorls entirely separate. 



Vitrinella. Adams. — Shell conical, very small, 

 glassy, the aperture very large, circular; deeply umbili- 

 cated, Animi " ^d operculum unknown. — 5 species. 

 Found at J amaica : very small and delicate. 



Calcar. Montf. — Shell like Trochus, but having a 

 stellated keel round the angle of 

 the last whorl ; conoidal ; the aper- 

 ture oblique, broader than high; 

 exterior generally rough; no um- 

 bilicus. Animal not to be distin- 

 guished from that of Turbo or 

 Trochus; the operculum shelly, 



Calcar. 



* Reeve's Iconica. 



