30 CRETACEOUS LAMELLIBRANCHIA. 



Measurements : 



Length . . . . .14 mm. 



Height . . . . . 13 „ 



Remarks. — This species is imperfectly known at present. The only specimens 

 I have seen are in the Museum of the Geological Society, and in Mr. Meyer's 

 Collection. With regard to the type specimen, Sowerby remarks, " The furrows 

 are produced by a Terebratula \? Rhynchonella] to which this specimen was 

 attached, and to which it consequently bears a great resemblance." 



Types. — The type, from the Lower G-reensand of Shanklin, is in the Museum 

 of the Geological Society (No. 2032). 



Distribution. — Lower Greensand of Redbill (Reigate) and Atberfield ; Ferru- 

 ginous Sands (upper beds) of Shanklin. 



2. Gault and Tipper Greensand Species. 

 Anomia, sp.; cf. pseudoradiata, d'Orbigny. Plate V, figs. 11 a, b. 



Remarks. — This form appears to differ from A. pseudoradiata, d'Orbigny, 

 only in having finer and less distinct ribs ; the difference may perhaps be due to 

 the mode of preservation. At present I have seen only two specimens. 



Distribution. — Gault of Black Ven (Museum of Practical Geology, No. 6440) 

 and Folkestone. 



Anomia, spp. 



In the Museum of Practical Geology, Jermyn Street, there are several speci- 

 mens from the Upper Greensand of Devizes and Warminster ; some appear to be 

 closely related to A. laevigata, Sowerby, others to A. pseudoradiata, d'Orbigny, 

 but they are not sufficiently well preserved to allow of exact determination. 



3. Chalk Species. 

 Anomia ? teansversa, Seeley, 1861. Plate V, figs. 12 a, b. 



1861. Anomia? transversa, H. Q. Seeley. Aun. Mag. Nat. Hist., ser. 3, 



vol. vii, p. 123, pi. vi, fig. 8. 



Description. — " Shell ovate, elongated, inflated. Umbo large, prominent, 

 inclining to the posterior end rather than central" (Seeley). 



