249 



M. RADIATA of Brown, Is closely allied to M. Modi- 

 olus, but is smaller, more delicate, covered with a yellow 

 epidermis]under which the white shell is, more especially 

 at the anterior end, rayed with more or less crooked, 

 crimson red wavy markings. 1. Tenby. 



M. NIGRA. Ohlong, very short, rounded and narrow 

 posteriorly, rather dilated anteriorly, margin nowhere 

 angulated, ventral edge rather incurved ; cuticle yel- 

 lowish black, sides radiated with raised striae which 

 appear granular from the very fine concentric decus- 

 sations, central area smooth ; ligament scarcely visible 

 externally. A single small specimen not one inch broad 

 was found at Scarborough by W. Bean, Esq. Foreign 

 Shells, (Newfoundland) are triple this size. 



LIMA APERTA Sow. Th. t. 22. /. 26, 7, 8, 9, 

 OSTREA HIANS Gmel. L. TENERA Turt. in Z. 

 J. 5. PECTEN FRAGILIS Mont. Sup. p. 62. Thin, 

 subcompressed, obliquely oval-elongated, smooth at the 

 sides, minutely striated in the middle, very slightly ga- 

 ping posteriorly, widely so anteriorly; anterior gape 

 margined by a strong internal rib ; anterior auricles 

 acute ; hinge area small. Rare. 



PECTEN ACULEATUS Jeffreys in Conch. Mag. 



