220 
quisitely sculptured with flat concentric ribs, varying greatly. 
in width, some twice, some four times as wide as the inter- 
spaces; others are only cords, not so wide as the intervals. 
They are higher on their convex than their concave edge. 
Numerous radial lire, increasing by intercalation, scallop the 
ribs more markedly along their concave than their convex 
margin, forming circular depressions in the interspaces. At 
the anterior and posterior areas of the shell these scallops 
become triangular rather than circular, and so form lozenges 
in the interspaces. Where the radials cross the ribs, if these 
are very narrow, they produce a tubercle with a central radial 
furrow ; if wide, they cross as a lira, with a central furrow, and 
sometimes another radial furrow is found on either side of 
this. 
Dimensions.—Umbo-ventral, 8 mm.; antero-posterior, 
75 mm. ; section of closed valves, 3°25 mm.; largest example, 
10°35 mm. by 10°3 mm. 
Locality.—Type, off Cape Jaffa, from 90 fathoms, with 1 
other valve ; 35 miles south-west of Neptune Islands, from 104 
fathoms, 62 valves. a 
Limopsis erectus, Hedley and Petterd. JER 
Limopsis erectus, Hedley & Petterd, Records Austr. Mus., 
vol. vi., part 3, p. 224, pl. xxxviii., figs. 14, 15. ‘Type locality, 
250 fathoms, off Bydnere 
Dredged 35 miles south-west of Neptune Islands, 104 
fathoms, 6 valves; off Beachport, 150 fathoms, 1 valve, 200 
fathoms, 1 valve; off Cape Jaffa, 130 fathoms, 17 valves, and 
300 fathoms, many small and mostly poor valves, but some 
with epidermis. The epidermis is abundant, of flaxen, bristly 
sete, long towards the ventral border. 
_Nuculina_(Cyritta,—A_Adams, s.g.) concentrica, n. F/O 
fpornuce LF, xxvii., figs, 4, da, 4b. 
‘Minute, obliquely-oval, equivalvular, inequilateral, 
higher than long, moderately solid, white, smooth, with six 
concentric equidistant imbricating steps. Umbos prominent, 
prosogyre, incurved, approximate. The front side at the 
upper third is oblique and nearly straight, being faintly in- 
curved; then rather suddenly roundly angulated, beyond 
which it is uniformly openly curved. The posterior side 
has a uniform gentle arcuation, and the basal outline is dis- 
‘tinctly more sharply curved. The hinge-plate is broad. The 
teeth of the left valve lie in front of those in the right valve, 
and the left lateral tooth lies outside the right. There are 
six cardinal teeth in each valve, all behind a pit lying be- 
neath and slightly in front of the umbo. The three nearest 
