N U C U L A. 



Plate IV. 



Species 24. (Mus. Cuming in Brit.) 



NuccLA risuM. Nuc. lesld minulissinut, veniricosti, 

 brevi, subohlique ovatd, pallide olivaced vix nitidd, 

 rugis elevatis, crenulatin, concentricis et striis 

 radiantihus decussald ; latere aiitico mbtruncato, 

 lunuld amplA. 



The PE-^v Nucula. Shell very minute, ventricose, 

 short, subobliquely ovute, pale olive, scarcely 

 shining, decussated with elevated concentric, cre- 

 nulated wrinkles and radiating stria; ; anterior 

 side subtruncated, lunule full. 



SowERBY. Proc. Zool. See, 1832. 



Nucula semi-oriMla, D'Orbigny. 



Hub. Valparaiso, Chili. 



Decies 25. (Fig. a, h, Mus. Ci 



Brit.) 



Nucula chenulata. Nuc. ledd ininutd, oblique sub- 

 trigond, rugis elevatis numerosis concentricis et 

 striis radiantibus decmsatd ; latere postico valde 

 declivi, margine dorsali convexo, crenvlato ; latere 

 antico brevissimo, nmbonibus amplis, elevatis, 

 tumidis ; lunuld ampld. crenulatd. 



The crenulated Nucula. Shell minute, obliquely 

 subtrigonal, decussated with numerous ele- 

 vated concentric wrinkles and radiating stria? ; 

 posterior side much sloped, dorsal margin convex, 

 crenulated ; anterior side very short, umboes full, 

 elevated, tumid ; lunule full, crenulated. 



A. Adams. Proc. ZooL Soc, 18G0. 



Hab. Guadaloup. 



Species 26. (Mus. Cuming in Brit.) 



Nucula e.xigua. Niic. testd minutd, brevi. altd, sub- 

 trigond, minutissimS decussatd; latere postico 

 in/rct. acuminata ; latere antico truncato. 



The narrow Nucula. Shell minute, short, elevated, 

 subtrigonal, very miiuitely decussated ; posterior 

 side acuminated below ; anterior side truncated. 



Sowerbt. Proc. Zool. Soc., 1832, p. 108. 



Hab. "West Columbia. 



October 



Species 27. (Mus. Cuming in Brit.) 



Nucula nitipula. Nuc. testd parvd, obliqui trigond, 

 altd, brevi, lavigatd, olivaceo-cinered ; latere pos- 

 tico valde declivi, ad terminum inferiarem sub- 

 acuminatd ; latere antico truncatd. recedenti, lu- 

 nuld convexd, angulatim circamscriptd, elongatd. 



The bright little Nucula. Shell small, obliquely 

 trigonal, elevated, short, smooth, olive-ash coloured ; 

 posterior side much sloped, subacuminated at the 

 lower termination ; anterior side truncated, re- 

 ceding ; lunule very little convex, elongated, 

 angularly defined, circumscribed, elongated. 



A. Adams. Proc. Zool. Soc, 185G, p. 51. 



Hab. New Zealand. 



Species 28. (Mus. Macandrew.) 



Nucula INIacandrei. Nuc. testd ovatd, Iwvigatd, tenui, 

 utrinque subacuminatd, omninb olivaced ; latere 

 postico producto latiuscido, margine dorsali sub- 

 cuneato, ared marginali dejiresso, subalato ; latere 

 antico acuminatim jio-ulo producto, angusto ; um- 

 bonibv^ acuminatis. 



Macandrew's Nucula. Shell ovate, smooth, thin, 

 subacuminated at both ends, olive in every part ; 

 posterior side produced rather wide, dorsal margin 

 a little cuneate, marginal area depressed, subalate ; 

 anterior side acuminately a little produced, narrow : 

 umboes acuminated. 



IIanley. Proc. Zool. Soc, 185(), p. 52. 



Hab. Straits of Malacca. Australia. 



A much less oblique shell than Nuctda tennis, witli 

 the anterior side a little produced. 



Species 29. (Mus. Cuming in Brit.) 



Nucula divaricata. Nuc. testd ellipticd, 



liris a medio divergentibus sculptd ; latere postico 

 oblongo, ared dorsali compressd, termino rotundo : 

 latere antico acuminalo, paulo producto, margine 

 luuulari excavatiin dcpresso. 



1870. 



