NUCULA.— Plate V. 



Species 37. (Fig. a, b, Mus. Brit.) 



NucuLA CORTICATA. Nuc. iestd hreviter subovatil, 

 tumidd, crassd, fulvd ; latere postico brevi, subro- 

 tundato, lumda indisiinctd, apice obtuso, manjine 

 ventrali convexo ; latere antico oblique injlato, ob- 

 tusissime angulato, margine dorsali cmivexo, ad 

 terminum vix acuminato. 



The corticated Nucula. Shell shortly subovate, 

 tumid, thick, fiilvous ; posterior side short, a little 

 rounded, lunule indistinct, apex obtuse, ventral 

 margin convex ; anterior side obliquely inflated, 

 very obtusely angulated, dorsal margin convex, 

 very slightly acuminated at the end. 



MoLLER. Fauna Groenlandica. Mijll., p. 17. 



Hob. Greenland. 



Species 38. (Mus. ? figure copied.) 



Nucula pulchra. Nuc. testd ovatd, solidd, vald'e 

 incequilaterali, concentrice liratd, epidermide fused 

 indutd ; latere postico brevissimo, ^ubperpendiculari, 

 lunuld parvd, convexd, circMmscriptd ; apice obtuso ; 

 margine ventrali oblique convexo ; latere antico 

 oblique injlato, producto, margine dorsali convexo 

 declivi ; ared Icevigatd. 



The beautiful Nucula. Shell ovate, solid, very 

 inequilateral, concentrically lirated, covered with 

 a brown epidermis; posterior side very short. 



nearly perpendicular, lunule small, convex, cir- 

 cumscribed ; apex obtuse, ventral margin ob- 

 liquely convex ; anterior side obliquely inflated, 

 produced, dorsal margin convexly sloped, area 

 smooth. 



Hinds. Proc. Zool. Soc, 1843, p. 97. Voy. Sulphur, 

 p. 63, pi. 18, f. 7. 



Hab. L'Agulhas Bank. Cape of Good Hope. 



This pretty species was taken at a depth of 70 



fathoms. 



Species 39. (Mus. Hanley.) 



Nucula antipodum. Nuc. testd perobliqud, clongato- 

 subovatd, tenui, politissimd, subcompressd ; latere 

 postico brevissimo, perpendiculai-iter truncato ; 

 latere antico attenuato, infrd ad terminum acu- 

 minato, margine dorsali aiigulato, declivi. 



The antipodean Nucula. Shell very oblique, elon- 

 gated, subovate, thin, very shining, subcompressed ; 

 posterior side very short, perpendicularly trun- 

 cated, anterior side attenuated, acuminated at the 

 end below. 



Hanlet. Proc. Zool. Soc, I860. 



Hab. Australia. 



This species does not seem to differ materially from 

 Nicidamitralis, also an Australian shell, excepting that 

 it is more acuminated at the anterior end and more 

 compressed throughout. 



