198 
Locality.—20 fathoms, outside Backstairs Passage, with 
six other examples, dead. 
Diagnosis.—From ZL. arenacea, Pritchard and Gatliff; 
in its marked carine, more widely canaliculated suture, and 
wider umbilicus. From Liotia alazon, Hedley, in being a 
smaller shell, with less valid carine, and in its radial in- 
cisions. 
Cuspidaria dorsirecta, n. sp. PI. xi., figs. 9 and 10. FG 
Shell small, moderately solid, oval, equilateral. Umbo 
prominent, acute, prosogyre. Post-dorsal line straight; ante- 
rior concave in front of the apex, then straight; the front end 
uniformly widely curved, ventral border gently curved, with 
very slight incurving at the base of the rostrum, which is very 
short and wide. Well-marked granulated ridge from the umbo 
to the postero-inferior angle of the rostrum; a second ridge 
cuts off its upper fourth. In front of the former is a mode- 
rate depression. Surface smooth but for sublenticular accre- 
mental strie. It has one anterior and one posterior lateral 
tooth well developed, roundly-triangular; the latter slightly 
the larger, and from its end a very low but gradually rising 
lamina is continued nearly to the end of the rostrum, and 
forms a narrow, slightly-widening groove with the dorsal 
margin. 
Dim.—Antero-posterior diameter, 5 mm.; umbo-ventral, 
3°3 mm. 
Locality.— Off Beachport, from 40, 100, and 110 fathoms; 
off Cape Borda, 60 fathoms; valves. 
Cuspidaria alta, n. sp. PI. xiii, figs. 8 toll. ~y~Gy 
Shell small, thin. Umbo tumid, blunt. Anterior dorsal 
border very faintly convex sloping; posterior dorsal border 
concavely sloping. Anterior end sharply rounded; posterior 
moderately and broadly rostrated. Ventral border uniformly 
widely arcuate, running concavely into the rostrum. An 
oblique, gradually-widening depression between the body and 
the rostrum, and an oblique ridge between its lower angle and 
the umbo; there is a second ridge close to the median line, 
the intervening space nearly flat. Outer surface smooth, but 
for sublenticular concentric striz, which are much more 
marked on the rostrum. Right valve with an anterior and 
posterior triangular lateral tooth, the latter the larger, and 
its groove running some distance into the rostrum. Left 
valve edentulous, and lies within the margin of the right. The 
pallial line ends by a nearly vertical curved line from the 
umbo. 
Dim.—Antero-posterior diameter, 6°8 mm. ; umbo-ventral, 
4 mm. 
