72 JAPANESE MOLLUSKS, NATICIDiE. 



Natica clausa Brod. & Sowb. {? afinis Gmel.). Shantar I. (Sehrenek). Compare 

 preceding and following forms. 



Natica operculata Jeffreys. P. Z. S.. 1885, p. 34, pi. 4, f. 7, 7a. 



North Japan (St. John). 



Polinices' melanostoma Gmel. Man. Conch. VIII, p. .'JO. 



Jiipan (Stearns). 



Polinices simiae Desh. Rve., Conch. Icon., pi. 17, f. 76 ; pi. 22, f. 98a, b (Good !) 

 Polinices powisianus Recluz. Tryon, Man. Conch., VIII, p. 42 ; Dkr., Index, p. 62. 



Yokohama (Dkr.) ; Nagasaki (Lischke). 

 Polinices powisianus v. draparnaudii Reel. Japan (Stearns). 



The single specimen secured by Mr. Stearns differs from N. powi- 

 siana var. drapar7iaudiiKec\. in having the spiral umbilical funicle 

 very heavy and strong, much more filling the umbilicus, and the 

 edge of the umbilicus is produced in a very strong spiral bounding 

 rib. 

 Polinices mamilla Linn. Man. Conch., VIII, p. 49. 



Nemoto, Boshiu (Stearns). Lischke reports the synonym or 

 variety pyriformis Reel, from Bay of Yedo. 

 Polinices (Lunatia) reiniana Dkr. Index, p. 62, pi. 4, f. 15, 16. 



Japan (Dkr.). 



Polinices (Lunatia) severa Gld. Otia Conch., p. 109. 



Hakodate Bay (Stimpson). 

 Compare Neverita reiniana Dkr. 



Polinices pallidus B. & S. Shantar I. (Sehrenck). 



Polinices (Neverita) ampla Phil. Ph., Conch. Cab. ed. 2, pi. 6, f. 2; Tryon, Man- 

 ual Conch., VIII, p. 32. 



Tokyo to Enoshima, Henda, Shibo, Boshiu (Stearns). 



The extensive synonymy of this magnificent Neverita has been 

 ably discussed by Tryon. 



Amaura (Acrybia] flava Gld. {aperfa Loven). Midd., Reise I, p. 206, pi. 9, f. 1-3. 

 Sigaretus insculptus Ads. & Rve. Zool. Samarang, p. 55, pi. 13. f. 10. 



Wakayama, Inland Sea (Dkr.). 



^Montfort, Conch. Syst., II, p. 222. This genus contains Naticas with cor- 

 neous operculum, the term Natica being restricted to species with the opercu- 

 lum shelly. The type of Polinices is Natica mamiUaris Lam.; not N. mam- 

 milla Linn, as Dall states ; Montfort's Polinices albus being identical with 

 the former species. 



