61 
KELLIA dubia. 
TAB. DCXXXVII. — -Jig. 4. 
Spec. Char. Transversely elongate-oval with 
rather straight sides, slightly convex, smooth, 
tender ; anterior side the smaller ; one erect 
somewhat compressed tooth in the right valve, 
and one obtuse lateral tooth and one minute 
central tooth in the other valve, 
Syn. Kellia dubia, Wood, loc. cit. 247. Morris, 
Catcd. 89. 
Externally smooth, with the exception of fine lines of 
growth ; internally fine radiating lines are seen in some spe- 
cimens. The muscular impressions are generally obscure, 
but one specimen shows the posterior one as subovate, the 
other more elongated, and the impression of the mantle 
without a sinus. This is the largest species of Kellia we 
know ; it is subject to some variation in shape, as shown in 
figures B. and 7 . We cannot agree with Mr. Wood in 
referring this to Psammotea dubia of Deshayes, because 
that is a gaping shell, and has a very different hinge. It 
is more like Erycina anodon of Philippi, vol. i. 13. t. 1 . f. 20, 
but that is said to have a small, very obtuse sinus in the 
pallial impression, and is smaller, with the umbo differently 
placed. 
Both the red and coralline Crag of Sutton afford this 
shell. 
