780 STRATIGRAPHICAL GEOLOGY. [Boos VI. 

strong avian affinities that their separate bones cannot be dis- | 
tinguished from those of birds. Professor Marsh, who has brought 

















Fic. 375.—Jurassic BELEMNITES. 
a, Belemnites paxillosus (Schloth.) (Lias, 3); b, B. irregularis (Schloth.) (Lias, nat. 
size); ¢, B. hastatus (Blainy.) (Middle Oolite, 4). 
these interesting forms to light, regards them as having been in 
some cases probably arboreal in habit, with possibly at first no more 

Y 
a, b, Wings of Neuropterous insects (Corydalis) (nat. size and mag.); ce, Carabus 
clongatus (nat. size and mag. Brodie, Foss, Insects, pl. ii. and v.). 
essential difference from the birds of their time than the absence of 
feathers. 
1 Amer. Journ. Sci, xxii. (1880), p. 340. See also Carl Vogt, Rev. Scientif. Sept. 
1879; Sceley, Geol. Mag. 1881, 800, 454. 
