NATICA. 
Monilifera, 147. 
Rufa, 148. 
Nitida, 148. 
Alderi, 149, f. 82. 
Glabrissima, 149. 
Helicoides, 149. 
Tuberosissima, 150. 
Intricata, 150. 
Rutila, 253. 
Grenlandica, f. 55, Mol- 
ler Index Grenlandie 
Molluscorum, (Nitida, 
265). 
IANTHINA. 
Communis, 151. 
Exigua, 151. 
Pallida, 152. 
SCISSURELLA. 
Crispata, 152. 
XXXIV 
VELUTINA. 
Levigata, 153. 
Otis, 153, f. 4. 
SIGARETUS 
Perspicuus, 154, f. 77. 
Tentaculatus, 15, f. 3. 
HALIOTIS. 
Tuberculata, 155. 
SCALARIA. 
Communis, 156. 
Clathratula, 157. 
Turtoni, 157. 
Treveliana, 254, f. 27. 
TORNATELLA. 
Fasciata, 156. 
Pellucida, 254. 
Fusiformis (Auricula F. 
145). 
ODOSTOMIA (x). 
Unidentata, f. 11. 
(«) This genus has required considerable revision. 
Mr. Macgillivray’s descriptions (his work appeared sub- 
sequently to the printing of most of our sheets), and the 
