IPS EELE Withers—Pollicipes levis, Sby. el 
Left tergum (Fig. 2; B.M., I. 13521) sub-rhomboidal, slightly 
convex; a rounded ridge, steep on the carinal side, divides the valve 
into two unequal portions ; the carinal portion is somewhat depressed 
and in its widest portion is about two-thirds the width of the occludent 
portion; the occludent portion is again divided almost equally by an 
obscure ridge from the apex to the scutal margin, which is immediately 
followed by a wide groove, almost parallel to the occludent margin. 
The well-marked grooves, of which there are seven on the portion 
preserved, are straight on the carinal portion, and on the occludent 
portion are straight until they reach the inner edge of the wide groove, 
and thence are recurved until they reach the occludent margin, where 
they are more sharply curved towards the apex. 
Fie. Pa) 
la. Pollicipes imbricatus, Withers, sp. nov. External view of right scutum. 
Albian, Upper Greensand: Blackdown, Devonshire. B.M., I. 13519. 
1. Id. Inner surface of same. 
2. Id. External view of left tergum. B.M., I. 13621. 
3a, Id. External view of carina. B.M., I. 5392. 
36. Id. Side view of same. 
3c, Id. Transverse section of same at one-third from base. ll figures x 4 diam. 
Length 9 mm., greatest breadth 6 mm., length of occludent margin 
5°5mm., length of scutal margin 6°5 mm. 
Carina (Figs. 3a—c; B.M., I. 5392) almost straight, with thin walls, 
widening gradually from the apex, subcarinated, triangular in 
transverse section, about twice as wide as high; apex probably 
pointed; basal margin angular (about 92°). The only ornamentation 
DECADE VY.—VOL. VII.—NO. XI. 32 
