LEDID. 165 
N. grayi, D’Orbigny, Am. Merid, p. 53; Sowerby, in Reeve's 
Conch. Lc., f- 13. Shell ovate, very transverse, slightly accuminated. at 
both ends, thin, rather inflated, very smooth, olive ; posterior side pro- 
duced; dorsal area compressed, elevated, sub-aliform, end acuminated ; 
anterior side a little produced, cuneated ; lunule short, defined (Sow.) 
New Zealand. (Cuming.) South America. (D’Orb.) 
FAMILY—LEDIDZ. 
Labial palps appendiculate, convoluted, very long. Mantle freely 
open, the margins fringed and usually furnished with ventral lobes ; 
siphonal tubes united, long, slender, and completely retractile. Gills 
narrow, plume-like, attached throughout their length. Foot compres- 
sed, slightly geniculate, deeply grooved, forming an oval disc with 
crenate edges. Shell oblong, thin, pearly within. Hinge as in Mucu- 
“ide ; ligament internal or external. 
Genus, LEDA—Schumacher. 
Shell oblong, roundedrin front, produced and pointed behind ; hinge 
like Mucula; margin even; pallial line with a small sinus; interior 
pearly. 
L. concinna, 4. Adams, P.Z.S., 1856, p. 48; Reeve, Conch. Ic., 
f. 15. Shell very thin, compressed, sides gaping, pale brown, concen- 
trically lirate ; lire narrow, regular, rather distant; anterior side short 
and rounded ; posterior jonger and beaked ; beak produced, thin, sub- 
recurved, truncate ; area lanceolate, narrow, bordered on each side by a 
crenate rib (Adams.) 
Cook Strait to Stewart Island. 
L. fastidiosa, A. Adams, P.Z.S., 1856, ~. 49; Reeve, Conch. Ic., 
J 31 (2.) Shell transversely ovate, yellowish-brown, concentrically 
lirate with brown; shining, concentrically finely and regularly sulcated ; 
anterior side sub-produced and rounded; posterior angulated and 
beaked ; beak acuminate ; ventral margin behind, sub-sinuous, and sub- 
produced in the middle (Adams). A shining, pale fuscous, ventricose 
species, very gibbous in the middle, and beautifully grooved transver- 
sely, the beak slender, pointed, and recurved (Adams.) 
Reeve says that this species is smooth and _ straw-coloured ; his 
figure does not agree with Adams’ description. 
New Zealand. (Cuming.) 
L. micans, 4. Adams, in Thesaurus Conchyliorum; Sow. in 
Reeve’s Conch. Ic., f- 39. Shell acuminately ovate; pale fulvous, 
sculptured with fine oblique sulci, interrupted posteriorly in two rays ; 
anterior side rather long ; posterior side rather short, acuminate, radia- 
tely angulated, dorsal area depressed, narrow (Sowerby.) 
New Zealand. (British Museum.) 
