164 NUCULID&. 
siphonal tubes ; gills small, pinnate, united behind. Foot compressed, 
deeply grooved, forming when expanded an ovate disc with serrated 
edges. Shell covered with an epidermis, pearly within. Hinge with a 
great number of comb-like teeth, interrupted in the middle by the liga- 
mental impression. 
Genus, NUCULA—Lamark. 
Trigonal, with the umbones turned to the short posterior side; 
epidermis olive, margins crenulated ; hinge with an internal prominent 
cartilage pit, and a series of sharp teeth on each side. 
N. nitidula, 4. Adams, P.Z.S., 1856, p. 51; Reeve, Conch. Ic., f. 
27. Shell very oblique, gibbose, anterior end obliquely sub-truncated, 
posterior rounded, produced; shining, obscurely sulcated ; umbones 
sub-acute ; pale brown, margins of the valves finely crenulated (Adams). 
Under a lens it is seen to be radiately striated. 
Auckland to Stewart Island. 
N. strangei, 4. Adams, P.Z.S., 1856, p. 52; Reeve, Conch. Ic, 
f. 15, Voy. Erebus and Terror, Moll, pl. 2, f. 14. Shell obliquely 
ovate, inzequilateral, sub-compressed ; covered with a shining golden 
green epidermis ; anterior end shorter, excavated at the lunule ; pos- 
terior longer, rounded ; arez lanceolate, elevated, Sauer oscurely 
concentrically sulcated (Adams. ) 
Wellington. N.S. Wales. (Angas.) 
N. suleata, 4. Adams, P.Z.S., 1856, p. 53 (nec Philippi ;) Reeve, 
Conch. Ic., f. to. Shell very convex, obliquely ovate ; umbones promi- 
nent ; anterior end shortly rounded ; pale olive strongly concentrically 
sulcated, radiately striated; striz stronger near the margins; margins 
crenulated (Adams.) 
Auckland to Wellington. 
N. castanea, 4. Adams, P.Z.S., 1856, p. 533 Reeve, Conch. Ic, 
f. tg. Shéll oval, very oblique, sub-compressed, chestnut, anterior end 
shortly truncated, middle of the lunule prominent; posterior end 
sloping, rounded; hardly smooth, obsoletely concentrically striated, 
obscurely radiately striated; margin of valves closely crenulated 
(Adams. ) 
New Zealand. (Cuming.) 
N. striolata, 4. Adams, P.Z.S., 1856; Reeve, Conch. Ic., f. 9. 
Shell oblique, sub-ovate, thick, ventricose, sculptured concentrically 
with flexuous, undulated sulci; posterior side sub-trigonal; dorsal 
margin sloped ; anterior side rather short ; lunule small ; umboes promi- 
nent, oblique, full (Sow.) 
Sowerby says that the specimens in the British Museum, obtained 
from Mr. Cuming, came from New Zealand ; but Adams, when describ- . 
ing the same specimens, said that they came from the China Seas. 
Adams is probably right. 
