A FISH BRAIN FROM THE COAL MEASURES 139 
Mississippian....... 
Pennsylvanian...... 
Rermuians +). <his e 
PUIGASSLC Que sae ee 
@retaceouseiis.. es 
Eocene to Pliocene 
(age of mammals). 
Pleistogenes..4.. 5254 
Actinopterygians (ganoids)—Nearly complete brain, ear, 
nerves, and arteries of Rhadinichthys deani (Eastman; ’08) 
Fishes with traces of lateral line 
Actinoptervgians (ganoids) (?)—Complete brain, inner 
ear blood vessels, and nerves 
Amphibians—Lateral line canals of head and sensory 
structures of lateral line organs on side of body and 
tail; complete alimentary tract and muscle fibers (Journ. 
Morph., 1908, p. 511) 
|Reptiles—No sensory structures represented 
(Fishes—No sensory structures preserved 
Amphibians—Brain case and nerve foramina; lateral line 
grooves on skull and pineal opening (Jour. Morph.., 
08, p. 511) 
|Reptiles—Brain case, nerve foramina, dural cast of 
brain and inner ear (Case, ’97) 
(Fishes—Lateral line organs (Bull. 18, Conn: State Geol. 
Natl. Hist. Survey, 711) 
Amphibians—Cast of brain (?), lateral. line canals on 
skull (Wiedersheim, ’78; Jour. Morph., 708, p. 511) 
Reptiles—Brain of Belodon (Cope, ’88) 
Mammals—No sensory structures known 
Fishes—Lateral line organs as indicated on the body scales 
Amphibians—No sensory structures represented among 
the two or three known snecies 
Pterodactyls—Brain and ear of two species 
Reptiles RUE at casts of brain and sacral 
| intumesence 
Birds—Archaeopteryx is the only possibility 
Mammals—Nothing known 
‘Fishes—Peculiar lateral line of a selachian (Wcodward) 
Amphibians—No sensory structures represented in the 
few species known 
Dinosaurs—Complete dural casts of brain of Tyranno- 
saurus (Osborn, 712) 
Birds—Brain of toothed bird, Hesperornis (Marsh, ’80) 
Mammals—Nothing known 
(Dural casts of the brain of many orders of mammals 
described in papers listed in bibliography. The cere- 
bellum in all preponderantly large, with cerebrum 
apparently smooth, though this latter may be due to the 
fact that the dural cast does not copy the entire series 
of convolutions of the cortex. 
Dural cast of calvarium of Pithecanthropus erectus and 
more complete dural cast of Eoanthropus dawsoni. 
(The most interesting information is in regard to the 
cranial capacity of the extinct species of man Homo 
neanderthalensis (Boule. Annales de Paleontologie, 
tome 6). 
