250 APPENDIX. 



that of Mya. The liver is, as usual, green. In other respects 

 there was nothing peculiar in the aspect of this animal. I found 

 no actual byssus at the heel of the groove." 



Vol. i. p. 190. Sph^nia Binghami. 



An examination of a larger number of individuals enables us 

 to correct our description of the hinge in the right valve. In 

 front of the oblique and subtrigonal cartilage-pit (erroneously 

 called tooth-receptacle in the body of our work), which slopes 

 inward beneath the general level of the margin, is a more or less 

 manifest low-seated denticle, which sometimes is even elevated as 

 a curved conic tooth, or pressed down and arching towards the 

 umbo, but rarely, if ever, projects perceptibly above the edge. 



Vol. i. p. 204. POROMTA GRANULATA. 



Living specimens of this interesting bivalve were taken by 

 Mr. M' Andrew, in August, 1851, near Kyleakin, in Skye. Our 

 friend has kindly forwarded a note of the appearance of the 

 animal and a slight sketch, which we have had engraved. " The 

 animal," he writes, " is very beautiful, of a kind of cream-colour, 

 and expands in the siphonal region like a flower, the petals of 

 which are represented by a fringe of eighteen or twenty tentacles 

 surrounding the bases of the two siphons, and, generally, but not 

 always reflected upon the shell. The siphons are short ; the 

 an teal one largest. The foot is long, narrow, and slender, and 

 very transparent. The mantle is open in front." Our conjec- 

 ture of the close affinity of this genus to Necera is evidently 

 correct. 



The examination of a second less inequilateral specimen of this 

 rare shell induces us to surmise its identity with the Embla 

 Korenii of Loven (Ind. Moll. Scand. p. 46). His very elaborate 

 details taken avowedly, like our own account, from a single 

 individual, differ somewhat from our description, yet are not 

 absolutely opposed to it ; more stress, however, is laid on cha- 

 racters, which we have failed to detect as positively developed. 

 The original, and then unique (as native) example entrusted 

 to our care for description being very fragile, we ventured not to 



