NUCULA.— Plate III. 



yulato, ad terminuin stibacummatum, latere anlico 

 suhrecedente, umbonibus terminalibun, elevatis, 

 lunula jjarvd. 



The little Nucula. Shell minute, elevated, obliquely 

 subtrigonal, smooth, very thin, of a rather ashy 

 colour ; posterior side much sloped, angular near 

 the dorsal margin, subacuminated at the end; 

 anterior side rather receding, umboes terminal, 

 elevated, lunule small. 



A. Adams. Proc. Zool. Soc, 1856, p. 52. 



Hab. Japan. 



This very minute Nucula is of a pale ashy colour, 



and semi-peUucid. 



Species 23. (Mus. Cuming in Brit.) 

 Nucula Paytensis. Nuc. testa oblique oblongd, subtri- 

 (/ond, comprcssd, solidd, minute liris concentricis 



crenulatis et striis rudiantibus decussaid ; later 

 postico declivi, vix convexo, terniino infrob subacu- 

 minato, inargine ventrali leviter convfxd ; umbo- 

 nibus terminalibus elevatis; latere antico truncato. 



TuE Payti Nucula. Shell obliquely oblong, subtri- 

 gonal, compressed, solid, minutely decussated with 

 concentric crenulated ridges and radiating stris ; 

 posterior side sloped, scarcely convex, the end 

 subacuminated below, ventral margin slightly 

 convex ; umboes terminal, elevated ; anterior 

 side truncated. 



A. Adajis. Proc. Zool. Soc, 1856, p. 51. 



Hab. Payti, Peru. 



More oblong, compressed, and distinctly decussated 

 than Nucula crenulata, with which M. Hanley at first 

 associated it. 



