JAPANESE MOLLUSKS, POLYPLACOPHORA. 113 



any locality outside of Japan. It is a very abundant form at Eno- 

 shirna. The central spatula is generally deep brown with a lighter 

 spot in the cavity of the apex, but sometimes it is orange (fig. 8) or 

 even in rare cases creamy. 



Helcioniscus toreuma Reeve. Lischke, Jap. Meeres-Conch., I, pi. 8, f. 12-15 ; II 



pi. 6, f. 12. 



Nagasaki (Stearns, Lischke) ; Enoshima (Stearns) ; Hakodate 

 (Stearns) ; Banda, Boshiu (Stearns). 



Even Lischke's splendid series of figures do not exhaust the color 

 variations of this Protean limpet. After examining several hundred 

 examples I am unable to retain P. amussitata Rv. as a distinct spe- 

 cies. The form I at one time called " nigrolineata var. divergens " 

 is also merely a heavy, large toreuma. 



Helcioniscus nigrolineatus Reeve. Lischke, 1. c., I, pi. 8, f. 5-11 ; II, pi. 7, f. 1- 



6. 



Enoshima (Stearns) ; Nagasaki (Lischke) ; Tsu-Shima (A. Ad.) ; 

 Toba, S.-E. of Nippon (St. John). 



The curious variety with vermiculate blackish concentric lines 

 (Lischke, pi. 8, fig. 10) was also collected by Mr. Stearns. 



[NOTE. Helcioniscus exaratus and Patella dypeaster have been 

 reported from Japan, but on insufficient evidence ; a specimen of H. 

 testudinarius L. was brought from Japan by Mr. Stearns, but it 

 probably was not native there]. 



AMPHINEURA. 

 LEPIDOPLETJKIDJE. 



Lepidopleurus fuliginatus Adams & Reeve. Pilsbry, Man. Conch., XIV, p. 10. 



Corea (Ad.). 



Lepidopleurus concinnus Gould. Pilsbry, Man. Conch., XIV, p. 11. 



Hakodate, on stones and shells (N. P. E. E.). 



Lepidopleurus (Deshayesiella) curvatus Carpenter. Pilsbry, Man. Conch., XIV, 

 p. 16. 



Okosiri (A. Ad.). 



ISCHNOCHITONID^:. 



Chaetopleura asperior Carpenter. Man. Conch, xv, p. 74, pi. 15, f. 38-41. 

 Tonicella marmorea Fabr. Pilsbry, Man. Conch., XIV, p. 41. 

 Northern Japan. 



Tonicella submarmorea Midd. Pilsbry, Man. Conch., XIV, p. 42. Catharina 

 submarmorea Dkr., Index, p. 159. Ch. insignis Rve. 

 8 



