BELEMNITIDJE I CONOTEUTHIS, BELEMNOTEUTHIS. 
119 
B. Shell conical , covered with an externally deposited Coat , forming 
a more or less elongated cylindrical Style . 
a. External Coat thin . 
2. Belemnoteuthis. 
b. External Coat forming an elongate Style . 
3. Actinocamax. The conical cavity in the style with an elon- 
gated longitudinal fissure on the lower side. 
4. Belemnites. The conical 'cavity in the style with an entire 
edge and no longitudinal figure. 
A. Shell conical , thin, naked , not covered with any externally deposited 
Coat ; probably produced behind into a long , slender , dorsal plate. 
1. CONOTEUTHIS. 
Animal ? — Shell. Cone broad, rapidly enlarging, thin, 
horny, smooth, marked with very slight rather oblique concen- 
tric lines of growth, not covered with any externally deposited 
calcareous coat, with a well marked strong longitudinal keel on 
the middle of the back (probably produced into a slender elon- 
gated dorsal style). Septa transverse smooth. 
Conoteuthis D’ Orb. An. Sci. Nat. xvii. t. 12. f. 1. 5. 1842, Paleont. 
univ. t. 30., Paleont. Frang. t. 1. supp., Moll. Viv. et Eos. i. 444. 
t. 32. i Desh. in Lamck. Hist. 240. 
1. Conoteuthis Dupinianus. 
Conoteuthis Dupinianus D’ Orb. An. Sci. Nat. xvii. t. 12. f. 1. 5., 
Paleont. univ. t. 30., Moll. Viv. et Eos. i. 444. t. 32. 
Eos. Paris Basin. 
B. Shell conical , thin, covered with a more or less thick externally 
deposited Coat. 
a. Outer Coat thin , merely covering the Shell. 
2. BELEMNOTEUTHIS. 
Animal elongate, subcylindrical. Fins lateral, rounded. Arms, 
sessile and peduncled, armed with two series of hooks (and round 
cups?). — Shell internal, conical, thin, elongate, subcylindrical; 
apex conical, chambered ; septa concave, even edged. Siphon 
near the edge of the septa, the conical upper part covered ex- 
