220 CRETACEOUS LAMELLIBRANCHIA. 



small secondary ribs at the summits of the primary ribs. I have not sufficient 

 material to enable me to decide whether or not V. trilinearis should be regarded as 

 distinct from V. Studeri. 



Type. — In the Woodwardian Museum. 



Distribution. — Cambridge Green sand (derived from the Gault). 



Velopecten pectinatus (Seeley), 1861. Plate XLII, fig. G. 



1861. Hinnites pectinatus, H. G. Seeley. Ann. Mag. Nat. Hist., ser. 3, vol. vii, 



p. 119. 



Remarks. — This form agrees with V. trilinearis in having very strong primary 

 ribs, but seems to differ in that those ribs are more numerous and consequently 

 closer together ; the secondary ribs at the summits of the primaries also appear to 

 be better marked, and are crossed by distinct concentric ridges. 



Type.— In the Woodwardian Museum. 



Distribution. — Cambridge Greensand (derived from the Gault). 



Velopecten, sp. Plate XLII, figs. 7, 8. 



A few specimens from one of the nodule beds of the Gault of Folkestone 

 agree with V. trilinearis (Seeley) in having relatively few main ribs on the left 

 valve, and in the presence of secondary ribs at their summits, but the shell 

 appears to be proportionately higher and shorter. 



Genus — Hinnites, Defrance, 1821. 



('Diet. Sci. nat.,' vol. xxi, p. 169.) 



Hinnites Favkintjs, Pictet and Rouoc, 185-3. Text-figs. 6, 7. 



1845. Hinnites Leymerii, E. Forbes (non Deshayes). Quart. Journ. Geol. Soc, 



vol. i, p. 250. 



1853. Favrintts, F. J. Pictet and W. Boux. Moll. Foss. Gres verts de 



Geneve, pp. 503, 547, pi. xliii, 

 fig. 2, pi. xliv. 



1854. — Leymerii, /. Morris. Cat. Brit. Foss., ed. 2, p. 169. 



1858. Favrinus, F. J. Pictet and E. Benevier. Foss. Terr. Aptien (Mater. 



Pal. Suisse, ser. 1), p. 135. 

 L865. — II. Coquand. Mon. Aptien de l'Espagne, p. 155. 



