N U C U L A. 



Species 8. (Fig./ a, h, Mus. Sowerby.) 



NucuLA MiTBALis. Nuc. testd oblique donaciformi, 

 ventricosd, nitidissimd ; latere postico elonga'.o, 

 margtne dorsali denticulato, convexo-declivi, de- 

 preasd ; termino acuminata, margine ventrali sursum 

 acclivi, wnbonibus elevatis, tenninalihus, latere 

 antico brevissimo, truncato. 



The mitke Nucula. Shell obliquely wedge-shaped, 

 ventricose, very smooth ; posterior side elongated, 

 dorsal margin denticulated, convexly sloped, 

 depressed ; end acuminated, ventral margin sloped 

 upwards, umboes elevated, terminal, anterior side 

 very short, truncated. 



Hinds. Proc. Zool. Soc, 1843. 



Nucula gibba, A. Adams. 



Ilab. Straits of Malacca, Hinds. Australia, Strange. 



Species 9. (Mus. Cuming in Brit.) 



Nucula striolata. Nuc. testd planiweuld, inditrigond, 

 ])allide olivaced, obliqnA, ininutissime radiatim stri- 

 ata, latere postico producto, margine dorsali declivi, 

 termino subacuminato, margine ventrali convexius- 

 culo; latere antico brevi, ared lunulari prominuhl. 



The striolated Nucula. Shell rather flattened, sub- 

 trigonal, pale olive, oblique, very minutely 

 radiately striated ; posterior side produced, dorsal 

 margin sloped, end subacuminated ; ventral margin 

 rather convex ; anterior side short, lunular area 

 prominent. 



A. Adams. Proc. Zool. Soc, 185G, p. 53. 



Ilab. New Zealand. 



The sulcated Nucula. Shell oblique, subovate, thick, 

 ventricose, sculptured concentrically with flexuous, 

 undated sidci, posterior side subtrigonal, dorsal 

 margin sloped ; anterior side rather short ; lunule 

 small ; umboes prominent, oblique, full. 



A. Adams. Proc. Zool. Soc, 1856, p. 53. 



Hab. New Zealand. 



Species 10. (Mus. Cuming in Brit.) 



Nucula sulcata. Nuc. testdobliqud, subovatd, crassd, 

 ventricosd, sulcis Jlexuosis undafis concentrice 

 aculptd ; latere postico subtrigono, margine dorsali 

 declivi ; latere antico brrvinsctilo ; liinuld parvd ; 

 umbonibus prominentibui:, obliquis, amplis. 



October 



Species 11. (Mus. Cuming in Brit.) 



Nucula Belottii. Nuc. testd inflatd, tenui, brevi, ele- 

 vatd, nitidissimd, olivaceo-virescenti, ad umbones 

 Icevigatis, medio et injra temnter concentrice rugatd ; 

 latere postico lata, margins dorsali declivi, angulato, 

 termino rotundo, obtuse ; latere antico hrevi, trun- 

 cato ; lunuld elongatd convexd ; margine ventrali 

 postice valde convexo, umbonibus elecatis, obliquis, 

 subterminalibus. 



Belott's Nucula. Shell inflated, thin, short, elevated, 

 very shining, olive-green, smooth at the umboes, 

 finely concentrically wrinkled in and below the 

 middle ; posterior side wide, dorsal margin sloped, 

 angular, end rounded, obtuse ; anterior side short, 

 truncated ; lunule elongated, convex ; ventral 

 margin posteriorly very convex; umboes elevated, 

 oblique, subterminal. 



A. Adams. Proc Zool. Soc, 1856. 



Ilab. Arctic Ocean. 



Species 12. (Mus. Sowerby.) 



Nucula radiata. Nuc. testd oblique donacifonni, solidd, 

 concentrice ad latera tenuissime liratd, radiatim 

 roseo fasciatd ; latere postico obliqtie producto, infrd 

 medium ad terminum subacuminato, margine dorsali 

 usque ad terminum conveoco-declivi, margine ventrali 

 acclivi, medio convexo, umbonibus subterminalibus, 

 elevatis, latere antico truncato, lunuld vix convexd. 



The rated Nucula. Shell obli([ueIy wedge-shaped, 

 solid, concentrically very finely ridged at the sides, 

 rayed with pink ; posterior side obliquely pro- 

 duced, subacuminated at the end lower than die 



1870. 



