BIVALVIA. 159 
Although I have not been able to see a specimen of that species to compare with it, yet, 
as I now think that the shell figured in the ‘Crag Moll.’ is not Binghamt, I have assigned 
it (still with doubt) to the species mentioned by Dr. Carpenter, and on his authority. 
T have seen no further specimens of the shell. 
Spuenia Binenamt, Turton. Supplement, Tab. X, fig. 13. 
Localities. Cor. Crag, Sutton. Red Crag, Sutton. 
The specimen figured in this Supplement was given to me by Mr. Charlesworth, who 
found it in a fragment of indurated mud from the phosphatic nodule bed at Waldring- 
field, and this, I have no doubt, is identical with the recent shell Sphenia Bingham. 
I have retained the above generic name as I think the shell is distinct from J/ya or 
Corbula. The left valve has a projection on which is placed the cartilaginous connector ; 
this extends along and under the dorsal margin on the siphonal side, and the right valve 
has a depression for its reception. ‘The interior of the shell is marked with a shallow 
sinus. This shell has been so fully described as a species by the British Conchologists 
that it is not necessary to repeat the description here. 
Genus—LyYONSIA. 
Tab. X, fig. 17, of Supplement represents the hinge portion of a bivalve from the 
Coralline Crag of Sutton, which I believe belonged to a species of Lyonsia. ‘This frag- 
ment shows the depressed and elongated pit beneath the dorsal margin in which, when 
alive, was placed the internal connector. ‘his pit is peculiar in its form, but I cannot 
find that it has ever been represented ; although Lyonsia Norvegica has been figured about 
twenty times and described under eight generic and nine different specific names, the 
hinge has been mentioned only so far as that it possessed a movable and calcareous 
ossicle. My fragment is very thin, fragile, and iridescent. 
CoRBULA ContTRACTA? Say. Supplement, Tab. X, fig. 11 a—c. 
CoRBULA conTRacTA, Say. Journ. Acad. Nat. Sci., ii, 312. 
— — Gould. Inv. Massach., p. 43, fig. 37. 
—_ _ Id. 2nd edit., p. 60, fig. 377. 
Localities. Fluvio-marine Crag, Bramerton. Chuillesford bed, Ditchingham and 
Haston Bavent. Middle Glacial, Hopton. 
