MALACOZOA TROPIOPODA. LAMELLIBRANCHIATA. 267 



rupted bands. Length an inch and two-twelfths, height nine 

 or ten-twelfths, thickness four or five-twelfths. 



This species differs from Venus Gallina chiefly in having 

 the valves thinner, the anterior slope shorter, the posterior 

 longer, the form more ovate, and the laminae thinner and 

 widely separated. It is perhaps only a variety of that species. 



The young are of a more roundish form, but otherwise simi- 

 lar. They have been represented in Brown's Illustrations, PI. 

 35. f. 13. by a characteristic figure, to which the name of 

 Ortygia costata is appended. 



This species is not uncommon along the coast, often cast on 

 the beach, and frequently brought up by the lines from deep 

 water off Aberdeen ; also found at Cruden, Peterhead, Gamrie, 

 Banff, and Portsoy. 



Venus laminosa. Turt Brit Biv. 148. PL 10. f. 4.—" Ortygia 

 Prideauxiana. Leach." — Ortvgia sulcata. Brown, Illustr. PI. 34. 

 f. 12. 



5. Venus fasciata. Banded Venus. 



Shell roundish-trigonal, compressed, thick, with broad, 

 flattened, smooth, concentric ridges ; the frontal line rather 

 concave, with the impression narrow-oblong, the dorsal line 

 a little convex ; the teeth thin, the margin crenulate ; the 

 colour white or reddish, with reddish-brown, crimson or pink 

 radiating bands, and smaller markings. Length and height 

 about ten-twelfths of an inch. 



Very rare, and only single valves met with, from off Aber- 

 deen. Found also at Fraserburgh, by Mr. Alexander Mur- 

 ray. In January, 1 843, a perfect specimen found at the Cove 

 by Mr. Fergusson. 



Venus fasciata. Donov. Brit. Sh. v. PI. 170. — Pectunculus fas- 

 ciatus. Da Costa. 188. PI. 13. f. 3. — Venus fasciata. Flem. Brit. 

 Anira. 447.— Venus fasciata. Tart. Brit. Biv. 146. PI. 8. f. 9.— 

 Venus fasciata. Brown, Illustr. PI. 35. f. 10. — Venus paphia. 

 Mont. Test Brit. 110. 



6. Venus ovdta. Ribbed Venus. 



Shell ovato-triangular, moderately convex, rather thin, di» 

 vergingly ribbed ; the ribs crenulated, being crossed by nu- 

 merous concentric striae ; the ligament scarcely apparent 

 externally ; the dorsal slope much longer, slightly convex, the 

 anterior convex ; the depression oblong, not distinct ; the 

 margin finely crenulated ; the colour brownish-white, of the 

 inside white. Length nine-twelfths, height seven-twelfths. 



