Parr III. Sxct.ii§1.] JURASSIC. 175 
and that of the older systems. The ancient trilobites and eury- 
pterids, as remarked by Phillips, are here replaced by tribes of long- 
tailed ten-footed lobsters and prawns, and of representatives of 
our modern crabs. 
Here and there, particularly in the Jurassic series of England and 
Switzerland, thin bands occur containing the remains of terrestrial 
insects. The neuropterous forms predominate, including remains 




Fic. 368.—L14s BracuHiopops. 
a, Lepte#na Moorei (Dav.)(nat. size and enlarged); b, Spiriferina Walcottii (Sby.). 
of dragon-flies and may-flies. There are also cockroaches and grass- 
hoppers. The elytra and other remains of numerous beetles have 
been obtained belonging to still familiar types (Curculionide, 
Elateridz, Melolonthidz). ‘The wing of a butterfly (Palzontina 
oolitica) obtained from the Stonesfield Slate is interesting as being 
the oldest known butterfly. Its nearest living allies are essentially 
tropical American forms.’ Some of the more important genera of 

Fic. 369.—Ooxiric BRACHIOPODS. 
‘a, Rhynchonella spinosa (Schloth.) ($) Lower Oolite; b, Terebratula Phillipsii (Mor.) 
(3), Lower Oolite; ce, Rhynchonella pinguis (Roem. ?), Middle Oolite, 
fishes are Acrodus, Aichmodus, Dapedius, Hybodus, Lepidotus, Lepto- 
lepis, Pholidophorus, Pyenodus, Saurichthys, Semionotus, Strephodus, 
Ischyodus.” 
The most impressive feature in the life of the Jurassic period is 
1 A. G. Butler, Geol. Mag. x. (1873), p. 2; i. 2nd ser. (1874), p. 446. 
? For a list of Liassic fishes, see memoir by H. E. Sauvage, Ann. Sciences Géol, vi. 
(1875). 
