54 ART. 2. — S. TOKUNAGA. 



nent ; hinge with two teeth on each valve and a trigonal pit 

 for the reception of the ligament. Length 9.5"'"^ (or 7"'") ; 

 height Q.ô"^"^ (or ß.ö''''') ; and breadth 8""" (or 5™"). 



Brauns designated this species as L. rubra Mont., but the 

 latter is distinguished by having no concentric striations, the 

 surface being quite smooth. 



Shinagawa (abundant), ( )ji and Tabata (rare). 



The species is known as living near Misaki (Sagami) and 

 Shima. 



136. lAHMA AFF. SUBORBICULARIS Mont. 



PI. III. Figs. 15 a and a'. 



Brauns, Geol. Env. Tokio, p. 43.— Wood, Crag Moll., II., p. 119.— 

 Weinkauff, Conch. Mittel-Meer, I., p. 174. — Jeffrey, Moll. 

 Lightening and Porcup. Exp. — Chall. Report, Vol. XIII., p 

 201 and 203. 



Oji (rare). 



L. suborbicularls ]\1ont. was found in the Pliocene and 

 Diluvium of Norway, Great Britain, Ireland and Italy ; and 

 known as living in the Mediterranean and Adriatic Seas, Indian 

 Ocean, North-west Coast of America, France, Portugal, Pied- 

 mont, Naple, Sicily, Spain, Norway and Madeira. 



ASTARTID>E. 



757. A8TARTE JAPONICA Tok. 



PI. III. Figs. 16 a, a' and h. 



Shell trigonal, compressed, thick, equivalved, concentrically 

 ribbed ; lunule impressed ; ligament external ; cardinal teeth exist- 

 ing in each valve ; pallia! line entire. Length 2.5'"'" ; height 

 2 4"^'" 



