ANOMIA. 



205 



A aculeata. 



Anomia aculeata, Gmeliv, Syst. 3346. — Turtox, Lin. Syst. iv. 285; Brit. Biv. 233; 

 Conch. Diet. 4. — CiiEMN. Conch, viii. 92, t. 77, lig. 702. — Montagu, Test. Brit. 

 157, t. 4, fij?. 5. — Pennant, Brit. Zool. iv. 233. — Dillwyn, Catal. 288. — Matox 

 and Rackett, Lin. Trans, viii. 103. — Wood, Index, pi. 11, tig. 7. —Gould, Inv. 

 Isted. 139, fig. 90. 



Shell small, rounded, the hinge-margin more or less truncated or 

 straight, color yellowish-white ; upper 

 valve convex, the beak obtuse and 

 marginal, the surface covered with mi- 

 nute, concave, or prickly scales, ar- 

 ranged in radiating, undulated lines ; 

 lower valve very thin, smooth, or with 



a few prickles near the margin ; aperture nearly circular ; within 

 shining; the convex valve exhibiting the exterior ribs near the 

 margin. Diameter about half an inch. 



Found amid the roots of Fuci which are thrown up attached to 

 stones, shells, &c. Eastport (Cooper) ; Halifax (Willis). 



This shell is easily distinguished from its co-species by the scaly 

 or prickly radiating lines upon its upper valve. It seems never to 

 attain a large size. 



Besides the two species before mentioned, there are probably two 

 others found in this State. But all species are so distorted as to 

 render it difficult to separate them definitely. 



Anomia electrica,* Lin. 



Distinguished by its sulphur or golden hue, defined edge, and 



Fig. 499. 



A. electrica. 



* T am indebted to Mr. Samncl Powel, of Newport, R. I., for the specimen fignrcd, 

 which was found with numerous others, living, at Stone Bridge, by T. N. Dale, Jr. The 

 species is very common at Newport. I suppose it to be the electrica. The figures are 

 the natural size. — W. G. B. 



