JAPANESE MOLLUSKS, NATICID^. 71 



showing three prominent keels. Young shells having three strong 

 keels with latticed intervals, the pits oblong and very deep, base 

 with two low spirals; when a diam. of 5 or 6 mm. is reached the 

 lattice becomes more superficial, the primary keels decrease and in- 

 termediate lirte appear. Aperture large, outer lip forming a half- 

 circle, columella less arched, moderately calloused ; umbilicus pene- 

 trating to apex, but a mere perforation at all stages of growth ; nar- 

 rowly but distinctly grooved behind the columellar lip. Alt. 16, 

 diam. 16 mm. 



Chikewa, Boshiu (Stearns). 



The narrow vertical pits of the earlier whorls are peculiar, and 

 very unlike the square pits of the young V. cancellata. The latter, 

 moreover, is not tricarinate in the young state. 



Vanikoro scalarina Gkl. Otia, p. 110. 

 Loo Choo (Stimpson). 



NATICIDJE. 



Natica taeniata Menke. Tryon, Man. Conch., VIII, pi. 4, f. 62, 64. 



Chikiwa, Boshiu (Stearns). 



Natica pellistigrina Chemn. Man. Conch,, VIII, p. 16, pi. 2, f. 33. 



Nagasaki (Lischke) ; Deshima (Dkr.). 



Natica colliei Reel. Ann. Mag., 187.5, p. 427. 



Matoza Harb., 6 fath., sand (St. John). 



Natica concinna Dunker. Dkr.. Moll. Jap., p. 14, pi. 2, f. 21 ; N. 6idnrta, Schrenck, 

 Amurl. Moll., p. 377, pi. 17, f. 1-3. 



Deshima and Yedo (Dkr.) ; Hakodate (Schrenck) ; Japan 

 (Stearns). 



Tryon considers concinna Dkr. and bicinda Sch. as synonyms of 

 colliei Reel. There cannot be much doubt that the former two are 

 specifically identical. 



Natica lurida Phil. Chikiwa, Boshiu (Stearns, typical specimens). 



Natica adamsiana Dkr. Dkr., Index, p. 61, pi. 13, f. 5, 6; Moll. Jap., p. 14. p'. 2, 

 f. 20. 



Banda, Boshiu (Stearns) ; Deshima (Dkr.). 

 Natica janthostoma Desh. Rve., C. Icon., pi. 18, f. 79. 



Banda, Boshiu (Stearns) ; Nemero, E. Yedo (St. John) ; Yedo, 

 Hakodate (Lischke). 



