TORNATINA. ] l\ 



Mantle witli the outer margin thickened and tri-lobatc, 

 the inner edge tapering, and lodged in the channelled 

 suture of the spire. Foot short, linear, anteriorly trun- 

 cate. 



Shell cylindrical or fusiform, involute, covered with an 

 epidermis; spire distinct, produced, apex mamillatcd, 

 suture canaliculated; aperture narrow, linear; inner lip 

 callous, furnished at the fore part with a single plait ; 

 outer lip straight, simple. 



Syn. Bullina, Blainv., not Ferus. or Rlsso. 



Ex. T. truncata, Adams, pi. 56, fig. 9. Shell, T. 

 voluta, Quoy and Gahnard, fig. 9, a. 



This genus is composed of a group of small shells 

 characterised by their elevated spire, channelled suture, 

 and plicate columella. The animal somewhat resembles 

 that of Cylichna, but the head is developed behind into 

 tentacular lobes. The species are inhabitants of deep 

 water, and are of limited locomotive powers, their foot 

 being very short and narrow ; they principally come from 

 the Philippines, the China Sea, and the West Indies, 

 while a few are from European seas, two being in- 

 habitants of the British Islands. 



Species of Tornatina. 



biplex, A. Adams. olivula, A. Adams. 



biplicata, Migh. planospira, A. Adams. 



canaliculata, Say. polita, A. Adams. 



ciuctella, A. Adams. pusilla, Pfeiff. 



coarctata, A. Adams. serninulum, Phil. 



fusiformis, A.Adams. simplex, A. Adams. 



gracilis, A. Adams. truncata, Adams. 



infrequeus, C. B. Adams. turrita, Moll. 



mamillata, Phil. voluta, Quoy and Gaim. 

 obstricta, Gould. 



VOL. II. i> 



