286 TRIBE PECTINIDES. 



P. Niveus*. Macgy. Edin. Phil. J. \3,p. 166. t. 3. f. 1. — FU 

 p. 384:.—Broivn, Brit. Cone. t. 22./. 16.— Sow. Th.f. 223,4. Oval, 

 rather thin, ventricose, upper valve slightly the larger ; ears unequal, 

 the posterior rather large ; white (sometimes with angular red va- 

 riegations ?) with forty smooth square ribs armed with distant acute 

 and erect spines, the interstices flat. 1-^ \\...G. Britain. 



P. Psevdolima. Sow. Tit. f. 235. Rounded oval, rather 

 oblique, subequivalve, ventricose, ears unequal, with scaly sulci, 

 the posterior elongated acute and in the lower valve spinous at the 

 margin, the anterior small and obtuse ; ribs twenty-seven, thickish, 

 bisulcated, somewhat rounded and armed with three rows of acute 

 scales, the interstices narrow and flat: orange, variegated with white 

 principally at the umbones. 1J....1^ . Philippines 1 . 



1 The following species of Lamarck I am unable to recognize. 

 I give as usual a translation of their specific characters. 



P. Lineolaris. Lam. 12. — Del. t. 15,/. 3. — Chenu. III. Conch. 

 Pecien, t. 15, /. 1. Both valves convex, whitish with extremely 

 close-set concentric red lines on the upper valve : rays 17, smooth. 

 I. Swollen near the beaks : ears equal. 



P. Flabellatus: Lam. 36. Rounded, with fan-like folds, 

 white, internally red : concentric striae in the interstices of the 15 

 convex ray. 3. Resembling Opercularis ; upper valve the less 

 *convex. (Ears unequal.) 



P. Dispar. Lam. 40. — Del. t. 15,/. 2. Suborbicular, whitish; 

 upper valve smoothish, a large fivelobed stelliform chesnut spot 

 at its base ; numerous small rays towards the margin. 1J-. Pecu- 

 liar from having the valves differing both in rays and colouring. The 

 lower is white with 18 equal rays ; the upper is white (reddish brown 

 within) with a large star-shaped spot with unequal pointed lobes. 

 (Ears unequal.) 



P. Quadriradiatus. Lam. 41. Ovate wedge-shaped, above 

 with longitudinal striae, whitish stained with blackish blue, with 

 4 large rays ; margins flexuous. -f. "Brought over by Peron> and 

 in allied to Pes-lulrte, but possesses two small rounded almost equal 

 auricles. 



P. Hexactes. Lam. 59. White, fanshaped, with 6 longitudi- 

 nally striated rays, the central one the broader. If. Neio Holland. 



See also P. Indicus. Desh. (Zool. Belanger Voy.) — Squamatus 

 Menhe (Synop) — Squamulosus. Desh. (Exped.Morea.) — Zelani- 

 cus Gray (Dieffen. N. Zeal.) — Jamesoni. Forbes (Wern. Mem. 8.) 

 — Convexus and Foliaceus. Quoy. (Voy. Astrolabe.) — Testve. 

 Bivon. (Phil. Moll. Sic.) — Dumasii. Payr. (Cat. Cors.) — 

 L-evis. Pen. (Br. Zool.) — Lamarckii Micans and 3iDessertii. 



