LOPHIIDA. — XCVI. t Wg 
Next come the Batrachians, animals bearing close relations to 
the “central stem” of the fishes, now represented by the Dipnot. 
They are decidedly fish-like in their early conditions, but this stage 
is ultimately outgrown. <“ The undivided cartilaginous coracoid of 
Polyterus (a Dipnoan) has a tubercle articulating with diverging 
rods; in the one we have the rudiment of the humerus, in the 
other the representatives of the ulna and radius, while the undif- 
ferentiated cartilage between the diverging rods is material for the 
carpal bones, and in bones radiating from that cartilage are the 
homologues of the metacarpals. The attempts of a primitive ani- 
mal of such a type to travel on land might develop the fore-limb, 
and a hind one would follow in sympathy with the other. Then we 
would have the first of the quadruped vertebrates,” the Batrachians, 
(Gill.) 
Notr.— Page 47. The Rep-Horsr or WHITE Sucker of the Chesa- 
peake region has the anterior rays of the dorsal elevated, the outline of 
the fin decidedly concave. It is perhaps a distinct species from the 
common Red-Horse of the West and South described in the text. It 
may stand as 81. Moxostoma macrolepidotum (Le Sueur), and the Western 
form, N. Y. to Dak, and Ga., as 81 (b). If. duquesnei (Le Sueur). 
