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quaI,one being subglobular, ventricose, and anteriorly 

 shortened, occasioning an aperture through which the 

 animal protrudes two wing-shaped portions of its body ; 

 the other is larger, and has its under part nearly flat. 

 Its trivial name in this country is Venus's chariot, from 

 a fancied resemblance to a triumphal car in miniature. 

 Shell, corneous, transparent, globose, oval, tridentated 

 at the posterior end ; the middle part perforated, with 

 a cleft on either side. 



Hyalaea tridentata Hyalaea cuspidata. 



CLIO. 



This is a molluscous animal without any testaceous 

 covering, but is here placed as leading to other species 

 of it which have shells. 



Clio borealis Clio australis. 



CLEODORA. 



CLIO PYRAMID AT A LtnJlCBUS. 



This is also a molluscous animal, but the posterior end 



