I,M "TERRA NOVA" EXPEDITION. 



:!0. C,>rl>iil,i h-i/nni, Smith. PI. II, tigs. '21, 22. 



Cm-litla Inimii, Smith, Ann. Mfitf. Nat. Hist, 18SO, vol. VI, p. 3i!l. 



Station 42, olt' Rio de Janeiro : 40 fathoms. 



Onlv a single lower valve was dredged at the above station. The species was 

 originally described from 48 fathoms in 32 45' S. lat., 50 39' W. long., east of 

 I'ruguay. The figures now given are taken from the type specimen. 



31. Cuspidaria braziliensis, n. sp. PL II, fig. 23. 



Shell not very thin, elongate, rounded in front, prolonged and rostrate behind, 

 moderately globose, exhibiting fine growth-lines and minute crowded granules upon 

 the entire surface, those upon the upper slope of the rostrum being arranged in 

 closely packed transverse series ; dirty white, surface dull, not glossy ; dorsal margins 

 oblique, anterior straight at first, then curving into the rounded end, posterior longer, 

 a little concave ; lower margin sinuated below the beak, then widely curved. 

 Umbones autemedian. An oblique faint depression from the umbones to the sinus 

 in the ventral outline marks off the rostrum, the upper part of which is feebly 

 defined by an oblique, obscure ridge. Character of the hinge normal. Interior of the 

 valves white, somewhat glossy, exhibiting some rather faint irregular radiating striae, 

 which are more or less interrupted by a subpunctate impression from the anterior 

 adductor-scar to the broad, rounded, pallia! sinus ; anterior impression ovate, posterior 

 semicircular, truncate above. 



Length, 27 mm. ; height, 15 ; diameter, 11. 



Station 42, off Rio de Janeiro : 40 fathoms. 



This species is at once distinguishable from others, more or less similar in form, 

 by the minutely granose surface, a most uncommon feature in the genus. 



32. Cuspidaria (Cardiomya) simillima, u. sp. PL II, fig. 24. 



Shell ovate, posteriorly rather shortly rostrate, inequilateral, longer in front of 

 the umbones than behind, white, very convex ; valves thin, with about twenty-five 

 curved radiating costellse upon the greater part of the surface, but not upon the 

 rostrum ; a few of the posterior costse are stronger than the rest, the hindmost one 

 marking off the comparatively smooth beak ; this, however, exhibits a few (nine or 

 ten) very fine curved lirae, some of which near the dorsal margin are rather indistinct, 

 being crossed by crowded growth-striae ; the rest of the surface of the valves is also 

 covered with very fine lines of growth ; anterior dorsal margin obliquely arched, 

 posterior more obliquely inclined, and a little concave ; anterior end sharply rounded, 

 ventral edge widely arcuate, but slightly incurved at the rostrum ; umbones smooth 

 at the lip, almost contiguous, inclining backwards; lunular area without radiating 

 linu, and there is also a lanceolate, smooth, sunken escutcheon posteriorly; interior 



