107 



that their absence in the adult eye of Rhineura is also due to ontogenic 

 degeneration. 



14. The irregularity in the structure and existence of the lens and the 

 great reduction of the vitreous body offer evidence in favor of the idea of 

 the ontogenically and phylogenically earlier disappearance of the onto- 

 genically and phylogenically newer structures. 



15. Horizontal nuclei found between the pigment epithelium and 

 the outer limiting membrane are probably derived from the proximal layer 

 of the optic cup. 



16. The different layers of the retina have reached a degree of differen- 

 tiation out of proportion to the great reduction of the dioptric apparatus 

 and general structure of the eye. 



Zoological Miscellany. 



C. H. ElGENMANN. 



1. Portions of a mastodon were found on a sand-bar in the Ohio River, 

 near Rockport, Ind. They have been presented to Indiana University by 

 Karl Cramex". 



2. The bones of Megalouyx jeft'ersoni, from the Owen collection, have 

 been mounted in their relative positions and are now on exhibition in 

 Owen Hall. 



3. The Museum of the Indiana University finds itself in possession 

 of a collection of birds, made by President Roosevelt at St. Regis Bay and 

 at Oyster Bay, between 1872 and 3877. Most of the specimens bear the 

 original labels written by Mr. Roosevelt, which are examples of explicitness 

 and fulness in labeling. The earliest specimen was collected February 

 12, 1872, and bears the serial number 4 of his collection. Mr. Roosevelt 

 published a small paper upon the birds of the Adirondaclis and another on 

 those of Long Island, based in part on these specimens. The trustees of 

 the University have ordered a dust-proof case to be made, in which they 

 are to be preserved for the future. 



There are forty-six birds in all, forty-two species, fifteen less than the 

 number sent here by the National Museum. 

 The labels read as follows: 



