116 JAPANESE MOLLUSKS, PELECYPODA. 



Dentalium ootogonum Lam. Lischke, Jap. Meeres-Conch., Ill, pi. 5, f. 1-H. D. 

 lii.nKjdinun Gld., Lischke, L c, pL 5, f. 4-7; D. japonicum Dkr., Ind. Moll. Mar. 

 Jap., p. 153, pi. a, f. 2. 



Kii coast (Stearns) ; Matozaand Ooshima Harbors, 6-8 fms. (St. 

 John). 



From a study of several hundred specimens collected by Mr. 

 Stearns I am disposed to consider octogonuvi, hexagonum Rud japon- 

 icum merely forms of one species. The development of interstitial 

 longitudinal riblets is very variable. 

 Dentalium sexcostatum Sby. Ann. Mag., 1875, Vol. XVI, p. ll.'J. 



Cape Shima, 18 fath.,GozaHarb., 6 fath., sandy mud (St. John). 

 Dentalium weinkauffi Dunker. Dkr., Index, p. 15;!, pi. 5, f. 1. 



Japan (Dkr.) ; Bishiu coast (Stearns). 



In the specimens before me the longitudinal riblets do not extend 

 so far toward the aperture as Bunker's figure shows. 

 Dentalium buccinulum Gld. Otia Conch., p. 119. 



Kagoshima (Stimpson). 

 Dentalium yokohamense Watson. Challenger Gastrop, 1875-6, XV, p. 11, pi. 2, f. 



Yokohama, 8 fathoms (Chall.). 

 Dentalium semipolitum Sby. Ann. Mag., 1875, XVI, p. 113. 



Cape Shima and Matoza Harb., 6-18 fath. (St. John). 



PELECYPODA. 

 TELEODESMA CEA. 



{Adesmacea.) 

 TEREDINIDJE. 

 Teredo japonica Clessin. Concbyl. Cab., p. 78, pi. 20, f. 9, 10. 

 Japan. 



PHOLADID.a:. 

 Pholas (Barnea) fragilis Sowerby. Thes., 11, p. 488, f. 92, 93. 



Nagasaki (Lischke). 

 Pholas (Barnea) manilensis Phil. Abbild., Ill, p. 51, pi. 1, f. 2. 



Numerous fresh specimens collected by Stearns, but exact locality 

 unknown. The margins of the gape are less acutely denticulate 

 than in typical examples, and more concave. These difterences prob- 

 ably indicate a distinct race, which may be called var. inornata. 

 Zirphaea crispata Linnc, Japan (Dkr., Stearns). 



