16 TESTACEOUS MOLLUSCA. 



X). 61. — Solecurtus Nuttalii. Conrad in J. A. N. S. Phil. 7. 

 fide Gould. Linear-oval, sub-diaphanous, rounded, equally broad at 

 both ends, flat, under a glossy olive green epidermis white, rounded 

 at both ends ; nearly smooth : inside white with a strong longitu- 

 dinal rib extending from the hinge to the margin : hinge twice 

 as near the posterior as the anterior, two remote and lamellar teeth 

 in one valve, four in the other. 2.. 5. — Sandwich Isles. 1 



S. Bidens*. Chem. — S. Fragilis. Mont. — D. p. 65. — 

 Turt. B. t. S.f. 3 — W. t. 3.f. 11.— Ck. f. 1939. Linear-oval, 

 nearly smooth, pellucid, brittle, white under a yellowish cuticle, a 

 reddish brown longitudinal stripe extending half way to the margin, 

 but becoming broader and fainter as it recedes from the hinge : 

 margins sub-parallel, the ventral sub-incurved in the middle : two 

 teeth in one valve one in the other. \ . . \\. — Nicobar Isles, tyc. 



S. Tenuis. W. S. t. i.f. 5. (not of Grif. Cuv.) Elongated 

 oblong, thin, rounded at the ends, thrice as broad as long, ventral 

 edge incurved in the middle, white under a dirty yellowish cuticle : 

 hinge, in one valve with a single projecting falcate tooth, a small 

 tooth with a denticle on each side in the other : inside uniform 

 white, without a rib, but with an oblique anterior radiating callus. 

 1..3. 



S. Novaculina. Benson. Elongated -oblong, obtuse at both 

 extremities, thin, dull white under an ochraceous epidermis, nearly 

 smooth, ventral and dorsal edges sub-parallel and scarcely at all 

 arcuated : beaks slightly prominent, broad, situated at about ^rd 

 from the somewhat narrowed posterior extremity : inside glossy, 

 often irridescent, teeth very small. {■••I-}* — Near Calcutta. 



S. Californianus — Cultellus C. Conr. Jour. A. N. S. 

 Phil. 7- p. 233. t. 18. /. 3. Linear, oblong-oval, thinnish, convex, 

 dorsal and ventral edges parallel, the latter incurved in the middle, 

 equally rounded at the sides, under a straw-coloured cuticle with 

 radiating wrinkles on the anterior slope, white tinged with yellowish 

 brown, with direct brown lines in the middle. 3^. — U. California. 

 Allied to Dombei. 



S. Subteres. — Cultellus S. Conr. Jour. A.N. 8. Phil. 7. 

 p. 233. t. 17. f. 10. Linear-oval, inflated or sub-cylindrical; dor- 

 sal and ventral edges sub-parallel, slightly arcuated, beaks very 

 obtuse, extremities equally rounded, under a yellowish brown finely 

 wrinkled cuticle, pale purple obscurely rayed : two teeth in each 

 valve, the anterior one of the right valve dilated. J- . . 2\. — U. Cali- 

 fornia. — Not impossibly the young of Dombei or Californianus. 



1 The S. Minimus of Ch.f. 31. (of which we have given a copy) 

 — D. p. 66. — W. t. 3.f. 19. — is evidently the young of a species 

 allied to this. 



