WOTUiS. TESTACEA 45. Pecten. 161 



little truncate, within white with a plain margin : beak nearly 

 central,, incurved. 



285. A. Note. Rhombic, reticulate, notched at top: beak 

 near one end, incurved, very remote, separated by a 

 deepigropvcv 



Donov. t. 153. Montague tab 4./. 3. 



Shell about half an inch broad, rufous brown, much gaping at 

 . the beaks and margin, a little truncate at both ends, within- 

 wbitish, crenate on the outer margin. 



286. A. mtiuta. Oblong, produced at one end into an an. 

 gular truncate indented beak, rounded at the other. 



Donov. t. 78. A. caudata. Walk. min. sh.f. 8j. A* Modiolus. 



Shell 4 lines long, hardly half an inch broad, white or yellow- 

 ish, finely striate transversely, with 3 4 strong execntric ridges, 

 closed : beak small, turning a little towards the angular side.. 



281. A. Nucleus. Subtriangular, produced at one end, 

 concentrically wrinkled and crossed with minute 

 obsolete striae, white, within silvery. 



Donovan t. 63. Linn. Trans. 6. t. 18./". 3-6. 



Shelly lines long, a' little more broad, covered with a glofsy 

 olive skin : beak oblique, under which js a heart-shaped depnefsi- 

 on : hinge angular, with regular pectinate teeth each side : margin 

 crenulate within. 



45. PECTEN. Scallop. 

 28S. P. majimus. Ears of equal size : shell with about 

 14 rounded ribs which are longitudinally grooved. 



Bf.' Zool. t. 59./. 61 . Donov. t. 49. - Ca Cost. t. 9./. 3. - 



Shell 5 inches long, 6 broad ; the upper-valve Hat, transversely 

 striate between the ribs, rufous ; lower-valve very concave* yel- 

 lowish-white; within whitish, rufous round the margin: ears 

 large, rectangular, with cMteufsate striae. 



289. P. Jac6b(tuii. Ears equal : shell with about 17 

 angular ri&s^which are longitudinally grooved. 



Br. Zool. t. 60. /. cV*iO • Donov. tab. 137. 



Shell 4 inches long,'!, broad ; the upper valve a little convex, 

 rufous; the lower white; transversely striate, within white, a 

 little tinged at the margin; ears rectangular, with decussate 

 striae. : 



290. P. opercularis. Ears nearly equal: shell with 

 about 20 rounded ribs finely striate longitudinally 

 and transversely* 



Br. Zool.-t. 60./. 63. Donov. t. 12. P. subrufus. 



Shell nearly orbicular, about 2 inches and a half wide, gene- 

 rally beautifully variegated white red purple or brown, the 

 upper-valve rather convex : ears rather unequal, with decussate 

 : striae, ciliate. 



291. P. lineatus. Ears a little unequal : shell with about 

 ' 18 narrow rough ribs, white with a purple Jine 



down each of the ribs on the upper-valve. 



Donov. t. 116. Da Costa tab. \o.f. 8. 

 • Shell about an inch and a half long, hardly as much broad, 

 ... white with 'a purple line down each of the ribs of the upper- 

 valve, lower-valve pure white, transversely striate : ears not 

 quite equal, striate. 



292. P. Pusio. Ears nearly equal : shell equi valve, 

 • • mostly distorted, with about 40 linear ribs, 



Br. Zool. tab* 61, /. 65, Donovan tab, 34. 



