400 PROCEEDINGS OF THE ACADEMY OF [July, 



PETRICOLID^. 

 Petricola cyclus Pils. PI. XIX, figs. 3, 4. 



Seep. 204. Types are No. 80,580 Coll. A. N. S. P., from 

 No. 1,199 of Mr. Hirase's collection. It has .some merely super- 

 ficial resemblance to P. typica Jonas. 



Petricola cyclus var. sculpturata Pils. PI. xrx, fig. 7. 



See p. 205. Types are No. 10,130 Coll. A. N. S. P., from 

 Puttalam, Ceylon. 



VENERID^. 

 Venus Hirasei PHs. PI. XIX, flg l ; PI. XX, flg. 20. 



See p. 205. Types No. 80,447 Coll. A. N. S. P., from No. 

 492 of Mr. Hirase's collection. It is curiously like the Panamic 

 T^. columbiensis Sowb., but ditiers in having fewer ribs separated 

 by much wider intervals, and a deeper, narrower pallial sinus. 

 The cardinal teeth are more deeply bifid than in V. columhiensis. 

 The largest specimen I have seen measures, length 52, alt. 44, 

 diam. 33|^ mm. It is from Oyama, Tsushima. 



Tapes platyptycha Piis. PI. XIX, fig. 6. 



Page 206. Types are No. 81,218 Coll. A. N. S. P., from No. 

 1,196 of Mr. Hirase's collection. 



Tapes phenax Pils. PI. XIX, fig. 5. 



Page 207. T^-pes are No. 80,436 Coll. A. N. S. P., from No. 

 432 of Mr. Hirase's collection 



DONACIDuE. 



Donax kiusiuensis Pils. PI. XX, fig. 19. 



Page 207. Types are No. 80,505 Coll. A. N. S. P., from No. 

 847 of Mr. Hirase's collection. 



TELLINID^. 

 Tellina (Merisca) pristiformis ". sp. PI. XIX. fig. 8. 



Shell equilateral, subtriangular, slightly inequivalve, the poste- 

 rior end being bent to the right; moderately convex, solid, white. 

 Surface dull and lustreless, sculptured with densely crowded fine, 

 concentric lamelhe, a little stronger and more spaced toward the 

 two ends; the intervals sculptured with fine, subobsolete, radial 

 striae, which are fainter in the middle, and often hardly percepti- 



