JURASSIC PERIOD. 



441 



Fig. 797 represents the animal of an allied genus, called Acantho- 

 teuthis. There were also species of the Sepia or Cuttle-fish family, 

 and Calamaries or Squids ; and the ink-bags of these species are some- 

 times found fossil (Fig. 796), and also the smaller ones of Belemnites. 

 Buckland states that he had drawings of the remains of extinct spe- 

 cies of Sepia made with their own ink. 



The sub-kingdom of Articulates was represented by various Worms, 

 Crustaceans, Spiders, and Insects ; and, of the last, all the principal 

 tribes appear to have been represented, even to the highest, the Hy- 

 menopters. Figs. 799, 800 are Crustaceans of the Oolyte, from So- 

 lenhofen ; 798, 801, remains of Insects ; 798, a Dragon-fly, or Libel- 



Figs. 798-802. 



Articulates. — Fig. 798, Libellula; 799, Eryon arctifermis ; SCO, Archaeomscus Brodiei ; 801 

 elytron or wing-case of Buprestis ; 802, Palpipes priscus. 



Ma (Xeuropter) ; 801, the wing-case of a Beetle (Coleopter), from 

 Stonesfield. Fig. 802 is -one of the Spiders. The oldest known (in 

 1873) British Crab, a long-legged Triangular Crab {Palceinachus lon- 

 gipes Woodward), comes from the Lower Oolyte. 



The sub-kingdom of Vertebrates included species of Birds, as well 

 as Fishes, Reptiles, and Mammals. 



Fishes. — The Fishes were almost solely Ganoids and Selachians ; 

 but none of the former have vertebrated tails, this Paleozoic feature 

 having disappeared. 



