G. OC. Crick—Actinocamaz from the English Chalk. 891 
specimen bears some resemblance to that author’s figures 3a, 6, but 
it is less inflated posteriorly and tapers less rapidly anteriorly than 
(Ze ar 
Fic. 1.—ActinocaMax BuiacKMoREI, n.sp. 
Upper Chalk (Senonian, base of zone of Actinocamax quadratus), West Harnham, 
Salisbury. (Dr. H. P. Blackmore coll.) 
A.—Ventral aspect. 
B.—Right lateral aspect, showing the flatness of the dorsal surface and the slight 
inflation of the ventral surface. 
C.—Dorsal aspect, showing the dorso-lateral grooves. 
D.—Sectional view of alveolar end: d, dorsal; v, ventral. 
E.—Transverse section at the most inflated part of the guard: d, dorsal; v, ventral. 
All the figures are of about the natural size. 
depressus [= A. Grossouwvrei] and A. depressus, var. fusiformis [= A. Toucasi]) 
associated together in the Cretaceous rocks in the north of Germany (Professor Dr. A. 
Andreae, ‘‘ Kin neuer Actinocamax aus der Quadratenkreide von Braunschweig’? : 
Mittheil. aus dem Roemer-Museum Hildesheim, No. 2, Dec., 1885). 
