232 MALACOZOA. TROPIOPODA. LAMELLIBRANCHIATA. 



4. Anom'ia aculedta. Priclhj Scale-Oyster. 



Shell roundish, thin, opaque, white ; the upper valve little 

 convex, with numerous radiating lamelloso-spiuous ridges, the 

 miibo glossy, and projecting beyond the margin ; the lower 

 valve fiat, or slightly convex, frequently costate and spinous 

 like the upper, the aperture roundish. Diameter about half 

 an inch. 



Not uncommon on shells, crabs, stones, and fuci ; often in 

 deep water; found by me at Aberdeen in September, 1841; 

 at Peterhead by Mr. Alex. Miu-ray, m September, 1 842. 



Anomia aciileata. Mont Test. Brit. 157. PI. 4. f. 5. — ^Anemia 

 aculeata. Tuit- Brit. Biv. 233. — Anomia aculeata. Flem. Brit. 

 Anim. 396.— Anomia aculeata. Perm. Brit. Zool. Ed. 2. iv. 233. 



5. Anomia punctata. Pustulated Scale-Oyster. 



Shell orbicuJar, thin, transparent, white or yellow ; the upper 

 valve little convex, undidatingly rugose, with irregularly dis- 

 posed pustular prominences ; the umbo rather small, convex, 

 obtusely pointed, cm-ved, not projecting beyond the margin. 

 Diameter about half an mch. 



Found by me, m August, 1842, among shells on the beach, 

 near Don-mouth ; and subsequently in various places. 



Anomia punctata. Gmel. Svst. i. 3346. — Anomia punctata 

 Tm-t. Brit. Biv. 232. PL 18. f. 11. 



6. Anorala cyJiiidrica. Lamellate Oval Scale-Oyster. 



Shell subovate, thin, subpellucid, white ; the upper valve 

 verv convex, concentrically squamoso-rugose, the umbo convex, 

 glossy, narrowed to an obtiise decm-ved point, projecting far 

 beyond the lower valve ; which is flat, irregularly striate or 

 lamellate, with the apertm-e large, romidish. Length about a 

 fourth of an inch, breadth a third or a fourth less. 



It varies considerably m form, being oblong, ovate, or 

 roundish. 



First found by me on Sertularite on the beach near Tar- 

 bathie; afterwards on various corallines, and the roots of 

 fuci. Also at Cruden, Peterhead, and Banii. 



Anomia cvlindrica. Gmel. Syst. Nat. 3346. — Anomia cylinclrica. 

 Penn. Brit."^ Zool. iv. 233. — Anomia cymbiformis. 3Iont. Test. 

 Brit. Suppl. 64. — Anomia cvlindrica. Tm't. Brit. Biv. 232.— Ano- 

 mia cvlindi'ica. Flem. Brit. Anim. 396. 



