JAPANESE MOLLUSKS, VERMETID^E. 59 



Planaxis cingulatus Gld. Otia Conch., p. 140. 



Ousima, under stones below water-mark (Stirnpson). 



TRICHOTROPIDJE. 



Trichotropis cedo-nulli A. Ad. Conch. Icon., Vol. 19, pi. 2, f. 7 a, b. 



Mino-Shima, 63 fms. ; Goto Is., 48 fms. (Adams). 

 Trichotropis bicarinata Broderip & Sby. Conch. Icon., XIX, p!. 1. f. 2. 



Aniwa Bay, 17 fms. (Ad.). 

 Trichotropis borealis Brod. & Sowb. Thes., Ill, p. 321, pi. 285, f. 1-3. 



Castle Point, Manchuria, 37 fms. (A. Ad.). 

 Trichotropis inermis Hinds. Thes., Ill, p. 321, pi. 285, f. 14. 



Okosiri Island, 35 fms. (A. Ad.). 



Trichotropis insignis Middendorff. Mai. Rossica, II, p. 107, pi. 10, f. 7-9; Ann. 

 Mag. N, H., 1875, XVI, p. 103. 



Akishi, 3 to 4 fath. (St. John) ; Aniwa Bay (Ad.). 

 Trichotropsis unicarinata Brod. & Sowb. Conch. Icon.. XIX, pi. 2, f. 8. 



Yamada Harbor, 7 fms. (St. John). 

 Trichotropis quadricarinata A. Ad. Conch. Icon., pi. 2, f. 9 a, b. 



Mino-Shima (A. Adams). 



Separatista separatista Dillwyn (S. chemnitzii A. Ad.). Dkr., Index, pi. 2, f. 1, 

 2. 



Nemoto, Bishiu (Stearns). 



VERMETID.K. 

 Thylacodes imbricatus Dkr. Moll. Jap., p. 17, pi. 2, f. 18; J. M. C., I, p. 83. 



Yedo, Nagasaki (Lischke) : Deshima (Nuhn) ; Manchurian and 

 and Japanese coasts (A. Ad.). Lives on stones. 

 Thylacodes nodosorugosus Lischke. J. M. C., I, p. 84, pi. 5, f. 1-4. 



Ohosaka, on Tridacna squamosa (Lischke). 



Thylacodes medusae Pilsbry. Plates IV, and V. 

 Proc. A. N. S., Phila., 1891, p. 471, pi. 17, 18. 



Saruga coast, on shells (Stearns). 



A large species, nearly always living in clusters, attached gener- 

 ally to shells. The young form an irregular spiral, the whorls of 

 which rest prone upon the base of attachment. As the tube increases 

 in diameter it becomes carinated on the lower outer portion, or the 

 part corresponding to the " shoulder " of the whorl in a regularly 

 spiral gasteropod. At this stage the whorls become more laxly 

 coiled, and when not too closely clustered, present the appearance of 



