117 



marked with chocolate brown, about forty fine prickly 

 radiating riblets. 1. S. ty W. Coasts, in crevices of 

 rocks. 



P. GLABER. Pen, 4. p. 223. Mont. p. 150. and 

 Sup. p. 59. t. 28. / 6. F. p. 384. ZWf. B.p. 211, 

 OSTREA G. Turt. D. p. 132. Equivalve, yellow 

 mottled with rufous brown, with very minute transverse 

 stricE and from seven to ten obscure rounded rays, and 

 numerous grooves in the inside, f . Scotland, near 

 Dunbar. 



P. TUMIDUS. Turt. B.p. 212. t. 17. /. 3. F. p t 



384. OSTREA. T. Equivalve, inequilateral, suborbicu- 

 lar, glossy white, transparent and without striae ribs or 

 sculpture of any kind; one of the sides produced ; ears 

 nearly equal, i. Torbay. 



* * Ears unequal. 



P. L^EVIS. Pen. 4. p. 223. Mont. p. 150. and 

 Sup. p. 161. t. 4./. 4.Turt f B.p. 213. P.p. 385. 

 OSTREA L. D. p. 131. O. SIMILIS. Laskey. Wer. 

 Soc. l.t.S.f.S. Equivalve, equilateral, orbicular, 

 thin, smooth, except a few transverse wrinkles, yellowish 

 white, often marbled with brown, semitransparent ; one 

 ear large the other small. . Anglesea $ W. Coasts, 



