^torphoh)q)/ of anme Cretaceous Cirrlpcdes. 371 



lower nKu-<;ins subparallel, and the lateral and carinal mar- 

 gins almost ecjual iu length, the valve being somewhat 

 ohh)ng iu shape. 



Dintributidii. — Albian, Gault: Folkestone, Kent'; Dienville 

 (Aube)j France. 



J. de C. Sowerby (1836, pi. xi. fig. 5*) established the 

 species Pullicijjes unr/nis on two valves, which presumably 

 represent a rostrum and a carinal latus, and at the sainc 

 time (1886, pi. xi. fig. 5) gave the name PuUicipes Icevis to a 

 carina and two terga which really belong to Pollicipes unyiiis. 



Darwin (1851, p. 64, ])1. iv. fig. 1) for good reasons 

 thought it advisable to adopt the name P. uupcis in prefer- 

 ence to P.lavis, and he figured a number of detached valves, 

 mostly fi'agmentary, said by him to belong to a single indi- 

 vidual. They comprised " a carina and pair of terga, 

 much mutilated, a rostrum, sub-rostrum, a pair of upper 

 latera, a pair of latera of the lower whorl from the carinal 

 end of the capitulum, aud two other latera of this same 

 whorl from one side of the rostral end of the capitulum.'" 

 From Darwin's statement as to the incompleteness of the 

 terga and carina, as well as from the present state of 

 the specimens, which are in the Geological Survey Museum, 

 registered 31378, it is quite evident that other specimens 

 must liave been used in the drawing of the figures. The 

 carina could not have been drawn from the present fragment, 

 for a part is present which is broken ofi^ in Darwin's figure, 

 and the terga, which Darwin himself said were much muti- 

 lated, must have been very much restored. The upper latus 

 is drawn much too symmetrically. None of the figures of 

 the lower latera are very accurate, and the subrostrum has 

 apparently been lost, since it is not with the other valves. 



^^'ith regard to the lower latera, Darwin further said 

 (1851, p. 66) : ^' these consist of two small [attached] valves 

 (/, A), namely (judf^ing from the position in which, over- 

 lapping each other, they were embedded), the first and 

 second, or more probably the second and third right-hand 

 rostral latera of the lower whorl ; and a pair {k, i) (right- 

 hand and left-hand) of latera, of about twice the size of tiic 

 two anterior ones, which must have come from the carinal 

 half of the whorl, but the exact position of which I cannot 

 tell.'' 



Concerning the number of valves, Darwin said (1851, 

 p. 67) : " "With respect to the number of valves in tlie whole 

 capitulum, it is almost useless to speculate : we have two 

 scuta, two terga, two upper latera, two rostra, and we may, 

 p('rha[)s, infer two carinne, making ten valves, we know of 



