44 ART. J. S. TOKÜNAGA. 



111. TELLINA OJIENSIS Tok. 

 PL II. Figs. 34 a, a' and h. 



Shell thick, tolerably swollen in the right valve ; anterior 

 side uniformly roiuided ; posterior shortened and not so abruptly 

 truncate as in many other species, but with a only slightly de- 

 pression running from the umbonal region to near the postero- 

 ventral angle ; ventral margin, uniformly rounded ; whole surface 

 with densely numerous, regularly arranged, strong ribs ; palliai 

 sinus very large ; hinge with a bifid cardinal tooth and a strong 

 lateral tooth on each side. Length 22'""' (or 20""") ; height IS"""^ 

 (or 15'""') ; and breadth 10""" (or 8"""). 



Oji (rare). 



Living at Hakodate. 



112. TELLINA AFF. RUTILE Dkr. 



PI. II. Figs. 35 a and a'. 



DrNKEPv, Index Moll. Maris Jap., p. 191.— Pilsbry, Cat. Mar. Moll. 

 Jap., p. 124. 



( >ji and Shinagawa (rare). 



T. rutile Dkr. is found living nenr Enoshima (Sagami) and 

 Nagasaki. 



us. 1 EI.LIXA NIPPONKA Tok. 

 PL 11. Figs. 36 a and a'. 



Shell transversely ovate, compressed, inequilateral ; anterior 

 side rounded, posterior short and subrostrated ; surface with fine 

 concentric striations ; cardinal tooth bifid in both valves; one 

 indistinct lateral tooth present. Length 21'""'; height 15"'"'; and 

 breadth 9'"'". 



