XXXIV 



NAT 1C A. 



Monilifera, 147. 



Rufa, 148. 



Nitida, 148. 



Alderi, 149,/. 82. 



Glabri&sima, 149. 



Helicoides, 149. 



Tuberosissima, 150. 



Intricata, 150. 



/faz/a, 253. 



Grcenlandica,f. 55, Mol- 

 ler Index Grcenlandice 

 Molluscorum, (Nitida, 

 265). 



IANTHINA. 



CommuniS) 151. 

 Exigua, 151. 

 152. 



SCISSURELLA. 



Crispata, 152. 



VELVTINA. 



Lcevigata, 153. 

 0^5, 153,/. 4. 



SIGARETUS 



Perspicuus, 154, y. 77. 

 Tentaculatus, 15, f. 3. 



HALIOTIS. 



Tuber culata, 155. 



SCALARIA. 

 Communis, 156. 

 Clathratula, 157. 

 Turtoni, 157. 

 Treveliana, 254, /. 27. 



TORNATELLA. ' 

 Fasciata, 156. 

 Pellucida, 254. 

 Fusiformis (Auricula F. 



145). 



ODOSTOMIA 0). 

 Unidentata, f. 11. 



(a?) This genus has required considerable revision. 

 JMr. Macgillivray's descriptions (his work appeared sub- 

 sequently to the printing of most of our sheets), and the 



