42G CRETACEOUS LAMELLIBRANCHIA. 



Astakte (Eriphyla) concinna, Soiverby, 183G. Plate XVII, fig. 7 (see p. 



116-118). 



When describing the species of A si arte the only specimen of A. concinna 

 known was the type, and I regarded it as probably only an individual variation of 

 A. striata. Dr. Kitchin 1 has since found several specimens in the Sandgate Beds 

 of a pit-sinking at Dover which agree with A. concinna, and he considers that 

 this should be regarded as a distinct species. Dr. Kitchin also obtained A. (Eriphyla) 

 striata, Sowerby, from the same place. 



CrASSATELLJTES, sp. [Omitted from Vol II, p. 130.] 



Internal casts of a short subquadrate shell, probably belonging to the genus 

 Crassatellites, occur in the Chloritic Marl of Maiden Bradley and Devizes. 



Crassatellites ? equisulcatus (Woods), 1897. Plate LXI, figs. 20, 21 . Plate LXII, 



fig. 1. 



[Omitted from Vol. II, p. 130.] 



1897. Aectica? equistjlcata, H. Woods. Quart. Journ. Geol. Soc, vol liii, 



p. 391, pi. xxviii, figs. 6 — 8. 



Description. — Shell convex, subquadrate, oblique, very inequilateral. Umbones 

 anterior, pointed, with slight forward curvature. Greatest convexity between 

 the umbones and the postero-ventral extremity; postero-dorsal part compressed. 

 Adductor impressions distinct, the posterior one deep. Shell rather thick, 

 ornamented with numerous concentric ribs, separated by narrow grooves. 



Remarks. — The systematic position of this species is uncertain ; it appears to 

 be closely allied to the form from the Chloritic Marl mentioned above. 



Type. — In the Sedgwick Museum. 



Distribution. — Chalk Rock of Cuckhamsley, Berkshire. 



Anthonya, sp. [Vol. II, p. 130.] 



A portion of a left valve of Anthonya closely resembling A. cavtiana has been 

 found in the Upper Greensand (zone of Vecten asper) of Kingskerswell, Devon 

 (Museum of Practical Geology, Jermyn Street, No. 997.) 



1 Lamplugh and Kitchin, ' Mesozoic Bocks in the Coal Explorations in Kent' (1911), p. 103. 



