TRIBE CONCHACEA. 11/ 



terior tooth rudimentary in one valve : margin crenated. lj . . If. 

 — Panama. 



V. Radiata. Chemnitz, f. 386.— D. p. 189. — W. t. S.f. 69. 

 Triangular heart-shaped, with decussated striae, the longitudinal 

 more distinct posteriorly; white with interrupted brown rays, 

 and the anterior slope usually streaked with brown : umbones 

 often stained w r ith violet, the beaks recurved : lunule defined by a 

 heart-shaped line ; inside white, the margin crenulated. -J . . 1. — 

 West Indies. 



V. Pr^parea. Say. Jour. A. N. S. Phil. 2. p. 271.— V. 

 Notata. Gould. Mas. f. 67. — do. Say? Subovate, dirty white 

 with zigzag blotches of liver brown, and numerous elevated subacute 

 parallel concentric lines, becoming mere wrinkles near the suture 

 of the anterior slope and obsolete on the disc, interstices plain : an- 

 terior slope flattened, margined by an acute line ; anterior margin 

 with an obsolete longitudinal very obtuse undulation, which gives the 

 tip of this margin a slightly truncated appearance ; areola cordate, 

 elevated at the suture : inside white or yellowish. 2 \. — United 

 States. 



V. Stutchburii. Gray, in W. S. t. 2. /. 4. — V. Callosa. 

 Conrad. Rounded heart-shaped, convex, moderately thick, chalky 

 white, with radiating ribs and concentric elevated striae, except 

 upon the anterior slope, which is devoid of both ; no lunule : inside 

 stained anteriorly with purple, the edge crenated. lj..l|. — 

 Sandwich Isles. 



V. Decorata. JBrod. fy Sow. Z. J. 5. Sup. t. 40. f. 3. — 

 Beeehey. Zool. t. 41. f. 9. Triangular-cordate, anteriorly pro- 

 duced, white, decussated by fine transverse crenulated riblets, and 

 radiating sulci. 



V. Spissa. Quoy. Ast. t. 84. f. 7, 8. Transversely ovate, 

 subequilateral, transversely wrinkled, brownish white with one or 

 two indistinct darker rays, the umbones minute and little promi- 

 nent ; lunule ovate oblong, defined by an impressed line ; within 

 except the disc, violet, the margin finely crenated. — New Zealand. 



V. Undatella. Sow. Z. P. 1835. Rounded elliptic, thick, 

 whitish with brown spots dots and waved markings, and crowded 

 radiating riblike striae, which are decussated by undulated and sub- 

 lamellar ones : posterior side the shorter, anterior rather sloping, 

 margins depressed ; ventral edge rounded, crenulated within. 

 1J . . If.— Calif vrnia. 



V. Pulicaria. JBrod. Z. P. 1835. Subtriangular, with very 

 numerous raised delicately plaited concentric lines ; white with 

 chesnut scattered spots often arranged in angular figures : dorsal or 

 anterior area, with blackish chesnut streaks : lunule brown ; inside 

 purplish, whitish towards the crenulated margin. 1-J-. r . l£, —VF. 

 Columbia. 



V. Discrepans. Sow. Z. P. 1835. Elliptic, thick, whitish 



