52 PROCEEDINGS COTTESWOLD CLUB 1907 
Distinctzon -—From C. nummata or C. permunismals, 
narrower, more elongate, and stouter. 
Localttzes :—Somerset, Radstock; Mr Tutcher and Mr 
Richardson. Normandy, British Museum, No. 34399*. 
10. CINCTA PINGUIS, sf. z., Pl. VI, figs. 19, 20. 
Description -—Subcircular, gibbous, stout, margins 
acute; anterior median portion of both valves flattened ; 
anterior margin straight. 
Distinction :—Is a shell of similar proportions to C. 
dives, but lacks the anterior bilobation. From C. conocolles 
(Rau) the broader anterior margin. 
Remarks :—When young, up to about 22 mm. in 
length, this shell would be fairly thin. The valves would 
then shew the commencement of median flattening. 
Locality :—Somerset, “Kilmersdon [Radstock] arm- 
atus”- zone, Mr Tutcher’s collection; Radstock, Mr 
Marshall’s collection—young specimens. Warwickshire, 
Fenny Compton, Slatter collection, B 15948 in British 
Museum (Nat. Hist.) 
II. CINCTA CONOCOLLIS (Raz), Pl. VI, figs. 13, 14. 
1905. Waldheimia conocollis, Rau, Brach. Mittl. ‘Lias 
Schwabens; Geol. Pal. Abh. N. F. VI, Pl. xxxiv 
(iv), figs. 12-15. 
Description :—Ovoid, stout, gibbous; margins sub- 
acute ; front narrow, straight. Apical angle about 102. 
Remarks :—The proportions of the specimen figured 
in Pl. VI, figs. 13, 14, agree very closely with the example 
depicted by Rau in his fig. 13. The only observable 
difference is that the beak is not so produced and appressed 
to the umbo. 
I would exclude from this association the example de- 
picted by Rau in his fig. 16, which is anteriorly excavate , 
and also the specimens referred to by Rau in his 
synonymy. 
