194 CRETACEOUS LAMELTJRRANCHTA. 



Venus flamiii, Sowerby, by several authors; ' and so far a.s I can jiulgo from the 

 few figures which liave been puljlislied, tliey seem to differ but little from 

 Sowerby's species. The example from Aachen figured by Goldfuss agrees closely 

 with specimens from Blackdown except that the bniiilc projects more at the 

 margin. Holzaj^fel has compared Aachen with Blackdown specimens, and 

 confirms Goldfnss's identification. The example figured liy d'Oibigny" differs 

 in having a large and deep escutcheon. 



Specimens from the Ti-ichinopoli Group (near the base of the Ariyalur Gi'oup) 

 were identified by Stoliczka'^ with Vmvs flavva. 



The absence of a channel under the anterior right cardinal, and lh(> occurrence 

 of fine i-adial ornamentation connect this species with Gallista. The pallial sinus, 

 however, resembles that of Pifuria. The anterior lateral tooth in the left valve is 

 much less prominent, and the corresponding pit in the right valve much smaller 

 and shallower than in either CaUisfa or Pitaria. This species is the type of the 

 section or sub-genus CaUutwa, Jukes-Browne.* 



Remarks. — This is a common fossil at Blackdown. The variations seen 

 consist in the proportion of height to length, the more or less triangular or oval 

 outline, and the more or less produced anterior part of the shell. 



Tyj)e. — From Blackdown ; in the British Museum. 



Bit^frUndinn. — Upper Greensand (zone of SchloonhacJiin rostrafn) of Blackdown 

 and Haldon. Recorded by Jukes-Browne from the Upptn- Greensand of Devizes, 

 the Isle of AViffht, etc. 



o 



Family— CATIDUDJE, Lamard-. 



Genus — Protocardia, E. Beyrirh, 1845. 

 (' Menke's Zeitschr. f. Malakozool.,' p. 17.) 



PijoTOCATMMA ANfiMOA, sp. nov. Plate XXX, figs. 7 n,h; Plate XXXT, fig. 1. 



Descripfiini. — Shell large, convex, with flattened sides, sulxpiadrate, luoderately 



1 Goldfuss, ' Petref. Germ.,' vol. ii (1840), p. 2:i8, pi. cxlviii, fig. 4 ; Miiller, ' Petref. der Aiuheii. 

 Kreidef.,' (1847), pt. 1, p. 25; Dresclier, 'Zeitschr. d. deutsch. geol. Gesellsch.,' vol. xv (186-3). p. 

 344; Brauns, ' Zoitsclir. f. d. tjesammt. Naturwiss.,' vol. xlvi (1876), p. 308; II. SchWidor. 'Zeitschr. 

 d. deutsch. geol. Gcsdlsch.,' vol. xxiv (1882), p. 27.T ; Holzapfel, 'Die MoUusk. Aachen. Kreide' 

 (' Palseoutograpbica,' vol. xxxv, 1889), p. 171, ]il. xiii, figs. 16 — 18; Vogel, ' Holland isch. Kreide' 

 (1895), p. 42. 



2 D'Orbiguy subsequontlv separated the Senouiau form under I lie name Venn)) suhpIaiKi. ' I'ludr. 

 de Pal.,' vol. ii (1860), p. 237. See also V. Renavxiava, d'Orbigny, ibid., p. 194. 



•■* Stoliczka, 'Palseont. Indica, Cret. Fauna S. Indi;!,' v<.l iii (1870), ]>p. 151, ICO, li;9, pi. vii. figs. 

 1—4. 



^ Proc. Malacol. Soc, vol. viii (1908), p. 156. 



