HAMINEA. 17 



much expanded, covering the sides and front of the shell, 

 the hind part extending beyond the shell. 



Shell thin, horny, convolute, elastic, ventricose, ovate or 

 globose, without coloured markings, transversely striated, 

 usually covered with a thin epidermis; aperture narrowed 

 behind, dilated and entire in front ; columella none ; outer 

 lip simple, acute. 



Ex. H. hydatis, Lhuucus, pi. 57, fig. 2. Shell, H. hy- 

 datis, fig. 2, a. 



In Haminea the shell is more invested by the animal 

 than in Bulla, so as sometimes to be considered as inter- 

 nal ; the shells, moreover, are corneous, thin, fragile, not 

 coloured or spotted, but transversely striated, and covered 

 with a thin epidermis. The species, like those of Bulla 

 proper, inhabit the estuaries of rivers, crawling slowly on 

 the slimy mud ; they are very voracious, preying chiefly 

 on bivalve Mollusca. 



Species of Haminea. 



ambigua, A.Adams. hydatis, Linn. 



brevis, Quoy and Gaim. incincta, Migh. 



castanea, A. Adams. iusculpta, Totten. 



cerina, Mke. luticola, C. B. Adams. 



coustricta, A. Adams. Natalensis, Krauss. 



curta, A. Adams. oryza, Totten. 



cymbalurn, Quoy and Gaim. parallela, Phil. 



cliaphana, Couth. papyrus, A. Adams. 



clegans, Gray. pemphis, Phil. 



exarata, Phil. (Sinensis, A. rotundata, A. Adams. 



Adams). succinea, Conr. 



Bavescens, A. Adams. teuella, A. Adams. 



folliculus, Mke. tenera, A. Adams. 



fusca, A. Adams. virescens, Sow. 



glabra, A. Adams. \itroa, A. Adams. 

 ' ruildingii, Swains. 



