ASTARTE. 105 



Affinities. — A. sinuata is distinguished from other Cretaceous species of Astarte 

 by the furrow passing from the umbo to the posterior margin. Conrad 1 thought 

 that this species might belong to his genus Lirodiscus. I am unable to express an 

 opinion on this matter, since I have seen only three examples, none of which shows 

 the hinge, nor is it seen in the figures given by previous writers. 



Type. — From the Aptian of Marolles (Aube). 



Distribution. — Lower Greensand (Crackers) of Atherfield. Recorded by Pictet 

 and llenevier from the Lower Greensand of Peasmarsh. 



Astakte upwaeensis, sp. nov. Plate XIV, figs. 10ft-r, 11a, b, 12. 



1883. Astarte, sp. nov., W. Keeping. Foss., etc., Neoc. Upware aud Brickhill, 



p. 122, pi. vi, fig. 9. 



Description. — Shell ovate, a little higher than long, moderately and evenly 

 inflated, moderately (or sometimes only slightly) inequilateral. Dorsal half narrow- 

 ing gradually to the umbo ; ventral half larger and with evenly-rounded margin. 

 Antero-dorsal border slightly concave; postero-dorsal border long and convex. 

 Umbones curving forward. Lunule large, ovate, depressed, with a sharp border. 

 Escutcheon lanceolate, with a sharp edge. 



Ornamentation consists of many flattened, inconspicuous, concentric ribs 

 separated by linear grooves. 



Measurements : 



(1) (2) (3) (4) (5) 



Length 24 . 21 19 . 14 . 13 mm. 



Height . 25 . 21-5 21 . 15 14 „ 



(1-5) Lower Greensand, Upware, 



Affinities. — This species presents some resemblance to A. valangiensis, Pictet 

 and Campiche, 2 but its dorsal half is not so narrow aud pointed, and the antero- 

 dorsal margin is less concave. It is also similar to A. Bhodani, Pictet and 

 Campiche, 3 from the Gault of Cosne, but the umbones are less prominent. 



Astarte u/pwarensis is distinguished from J. circularis, Gueranger, 1 by its ovate 

 outline and greater height. 



Type. — Of the specimens of this species which were figured by W. Keeping as 



1 ' Amer. Journ. Conch.,' vol. v (1869), p. 46. 



2 'Terr. Cret. Ste. Croix' (Mater. Pal. Suisse, ser. 4, 1S66), p. 303, pi. exxiii, figs. 3, 4. 



3 De Loriol, < Gault de Cosne ' (1882), p. 94, pi. xii, figs. 1-7. 



1 ' Album Paleont. de la Sarthe ' (1867), p. 12, pi. xv, fig. 12, pi. xvi, figs. 7, 8. 



14 



