222 



CRETACEOUS LAMELLIBRANCHTA. 



narrower and the intervening grooves broader. The scale-like projections are 

 sometimes greatly developed. 



Measurements : 

















(i) 



(2) 



(3) 



(4) 



(5) 



(6) 



Length . 



139 



. 130 



. 130 



. 118 



. 118 , 



113 mm, 



Height . 



152 . 



13-5 , 



, 131 . 



123 . 



122 



120 „ 



(1—6) Perna-bed, Atherfield. 



Affinities. — This species is related to Hinnites Benevieri (Coquand), 1 but is dis- 

 tinguished by the ribs being less frequently bifurcated and more nearly straight. 

 H. Leymerii, Deshayes, 2 differs from H. Favrinus by the great inequality of the 

 ribs — a few being large with smaller ribs in the interspaces. 



Philippi 3 has discussed the affinities of the group to which the above-mentioned 



Fig. 7. — Hinnites Favrinus, Pict. and Koux. Museum of Practical Geology, No. 8444. Lower Greensand 

 (Perna-bed), Atherfield. Left valve, x ■§. 



species belong, and is inclined to regard it as genetically independent of the 

 Tertiary species of Hinnites. This view seems to be based chiefly on negative 

 evidence, viz. the absence, so far as at present known, of Hinnites from the Upper 



1 Pictet and Campiche, ' Foss. Terr. Cre't. Ste. Croix' (1870), p. 227, pi. clxxvi. 

 - Pictet and Campiche, ibid., p. 224, pis. clxxiv, clxxv. Deshayes, ' Mem. Soc. geol. France,' 

 vol. v (1842), p. 27, pi. xiv, fig. 1. 



8 'Zeitschr. d. deutsch. Geol. Gesellsch.,' vol. 1 (1898), p. 601. 



