BELEMNITID^; : BELEMNITES. 123 



4. AcTINOCAMAX SUBVENTRICOSA. 



Shell conical, concentrically rugose. Style elongate, subcylin- 

 drical, smooth, rather trigonal, compressed in front, depressed 

 and mucronate at the tip behind ; lateral grooves flattened, 

 simple, evanescent behind. 



Belemnites subventricosus Wahlenb. Act. Upsal. viii. 80. 1821 ; 



Voltz,^ Belem. 64. t. 8. f. 1. 

 B. mamillatus Nelson, Act. Holm. 1825, 340., Petref. Suec. 10. t. 2. 



f. 2.; Hissing, Lethaea Snec. 31. t. 10. f. 7. ; Roemer, Kreid. 84. 

 B. Scaniae Blainv. Belemn. 61. 1827, Diet. Sci. Nat. f. 6. ; Desk. 



E. M. ii. 124. 

 Belemnitella subventricosa D Orb. Paleont. univ. t. 31. f. 7. 12., 



Moll. Viv. et Fos. i. 454. t. 33. f. 7. 12. 



Fos. Chalk. Sweden. 



4. BELEMNITES. 



Shell conical ? . The externally deposited style with 



an entire margin to the edge of the conical cavity (which 

 covered the shelly cone). 



Belemnites Lister, 1678'; D'Orb. An. Sci. Nat. xvii. 1842, Paleont. 



Ter. Jur. 1842, Moll. Viv. et Fos. i. 459. 

 Belemnita Fleming, Brit. Anim. 1828. 

 Belemnites (pars) Ehrhart, Beh Suec. 1727 ; Lamck. Hist, (not 



Syst. 1801). 

 Nautilus Belemnita Gmelin. 

 Histolithis Montf. Conch. Syst. i. 387. t. 97. 

 Acamas Montf. Conch. Syst. i. 1808. 

 Acheloi's Montf. Conch. Syst. i. 1808. 

 Callirhoe Montf. Conch. Syst. i. 1808. 

 Celocis Montf. Conch. Syst. i. 1808. 

 Chrysaor Montf Conch. Syst. i. 1808. 

 Hibolithes Montf. Conch. Syst. i. 1808. 

 Paclites Montf. Conch. Syst. i. 1808. 

 Poradragus Montf Conch. Syst. i. 1808. 

 Thalamus Montf. Conch. Syst. i. 1808. 

 ? Platinites Rufin. 

 Actinocamax (pars) Voltz, Ann. Sci. Nat. xiii. 354. 1840, not 



Miiller ; Philips, Hartmann. 

 ? Pseudobelus Blainv. Belemn. 113. 

 Notosiphites and Gasterosiphites Duval. 

 Ocoeli, Notocoeli, and Gastrocceli D' Orb. Paleont. univ., Moll. Viv. 



et Fos. 

 Teudopsis sp. Deslongchamps, Mem. des Soc. Norm. v. 72. 183S. 



G 2 • 



