38 
yAniLOIDEA. 
Horizon. Etage E, bande e 2 ( = Salopian). 
Locality. 'Wiskocilka, Eohemia. 
Well represented in the Collection. 
Orthoceras arcticmn, sp. nov. 
1878. Cyrtoceras, sp., Etheridge^, Quart. Joum. Geol. Soc. vol. xxxiv. 
p. 608. 
Eig. 3. 
Orthoceras arctimrn, sp. nor. — a, figure of the type specimen, with the septate 
portion shghtly restored, one half the natural size ; h, section showing 
siphuncle, one half the natural size ; c, fragment of the test, natural size ; 
d, markings on the internal cast of the shell, probably produced by the 
mantle of the animal, enlarged to about twice the natural size. — N.B. The 
Etrise on the upper part of fig. 3 a (the body-chamber) are made a little too 
thick. 
^ “Palaeontology of the Coasts of the Arctic Lands visited by the late 
British Expedition (‘ Alert ’ and ‘ Discovery ’), under Captain Sir George 
^’ares, B.N., K.C.B., F.E.S” 
