168 EOCENE MOLLUSCA. 
8. CrassaTELLa PuMILIO, S. Wood. Pl. XXIV, fig. 1. 
Spee. Char. C. Testa minutissimd, rotundato-trigonuld ; subinequilaterali ; umbonibus 
acutis, prominentibus ; lunuld minima, depressd, ovatd ; cardine brevi, in valvuld dextraé 
bidentato, in alterd unidentato ; dentibus lateralibus, elongatis ; marginibus integris. 
Shell very small, roundedly triangular, slightly inequilateral ; beaks sharp and rather 
prominent ; lunule small, ovate, and depressed ; hinge short, with two cardinal teeth in 
the left valve and one in the right ; lateral teeth narrow, elongated; margin smooth. 
Diameter, ='gth of an inch. 
Locality. Wigheliff, Barton (Edwards). 
Two small specimens exhibiting the interiors of the opposing valves are among the 
shells kindly sent to me for examination and description by Mr. Edwards, and the card to 
which they are attached has on it the name of Goodallia trigona, but I think the arrange- 
ment of the dental furniture corresponds better with the genus in which I have here tem- 
porarily placed them. The connector appears to have been cartilaginous or internal. The 
specific name of érigona is preoccupied in this genus, and the above one which I have 
proposed is more expressive of its diminutive character. It may possibly be the young 
state of Cr. Bartonensis or some other triangularly formed species, and its present name 
is merely provisional. 
9. CrassaTELLa stnvosa (?), Lamarck. Pl. XXIII, figs. 3 and 9. 
CRASSATELLA stNuosa (?), Desh. Coq. Foss. des Env. de Par., vol. i, p. 39, pl. v, 
figs. 8, 9, 10, 1824. 
Spee. Char. Cr. “ Testa ovato-inflaté anticé (?) angulatd, sinuatd, sulcis numerosis 
wregularibus, levibus ; margine crenato ; lunuld profundd ovata.” —Deshayes. 
Shell ovately triangular, thick, strong, equilateral ; pedi-lateral margin rounded, the 
opposite side angulated, truncated, subsinuated ; pedal region covered with depressed and 
rather irregular ridges, the other half of the shell nearly smooth, with an obtuse diagonal 
ridge on the siphonal side, beyond or above which the shell is flattish, with rough lines of 
growth ; hinge thick and broad; margins crenulated. 
Length, 1+ ch; height, 143;ths inch. 
Localities. Barton and Bracklesham (Zdwards). 
France: Chaumont, Calc. gross. (Deshayes). 
There are two specimens in Mr. Edwards’s cabinet which appear to correspond with 
the French shell, but to which I have put a mark of doubt, one from each of the above- 
named localities. The shell in France is, I believe, not rare, and is subject to consider- 
