VANIKORO. 67 



Section YELUTELLA, Gray, 1847. 

 V. PLICATILIS, Miiller. PI. 28, figs. 55-57. 



Nearly membranous, translucent, with obscure spiral striae and 

 irregular growth-lines ; 3 7 ellowish or yellowish brown ; whorls 2^, 

 ventricose in fresh, but compressed (from collapse) in dried 

 specimens, suture deep; epidermis tough, but readily separated 

 into slight fibrous plaits. Length, *5 inch. 



The animal is bright orange color, sometimes speckled with 

 yellow. 



Northern Europe, Greenland. 



Is Bulla flexilis, Montagu. V. coriacea, Pallas, may be only a 

 large variety. 



Y. CORIACEA, Pallas. PL 27, figs. 49, 50. 



Membranaceous, corneous, subpellucid, rugosely striate ; 

 whorls 2-|, the last very large, expanded. 



Kurile Islands. 

 Y. CRYPTOSPIRA, Middendorff. PL 27, figs. 45-47. 



Shell narrower, more elongated than V. ldevigata,ihe columellar 

 Up forming an angle with the outer lip below ; coriaceous, or with 

 a very slight calcareous deposit. Length, 10 mill. 



Ochotsk Sea, Alaska, etc. 



Undetermined and Unfigured Species. 



Y. BERNARDI, Martens (PL 28, fig. 58). Nab. unknown. 



Y. PUSIO, A. Ad. Straits of Corea. 



Y. SIGARETIFORMIS, Potiez. (A young Natica ?) Australia. 



Y. SITKENSIS, A. Ad. Sitka. 



Y. STYLIFERA, Fleming = Sty lifer Turtoni. 



Y. MARGARITACEA, Duclos. Australia. 



Subfamily III. YANIKORIN^E. 

 Genus YANIKORO, Quoy and Gaimard, 1832. 

 Y. CANCELLATA, Lam. PL 29, figs. 60, 61. 



Broadly patulate, rather thick, cancellated with oblique rather 

 lamellar ribs and thin spiral ridges ; epidermis yellowish brown. 

 Diam. 1 inch. 



Isl. of Vanilcoro, 



