1906.] 



NATURAL SCIENCES OF PHILADELPHIA. 



441 



Where scales fell from trunk a broad silvery band exposed, extending 

 from eye to middle of base of caudal. Humeral and caudal spots if 

 present in life now faded entirely. Iris reddish-brown. Length 2y 

 inches. Coll. of 1877. 





"X 



Fig. 38. — Tctragonopterus ovahs (Giinther). 



Plethodeotes erythrurus Cope. 



Proc. Amer. Philos. Soe. Pliila., XI, 1869-70 (August 19, 1870), p. 563, 

 figs. 6 and 6a. T}T)e, No. 8,032, A. N. S. P. Pebas, Equador. John 

 Hauxwell. 



Chalceiis erijthrurus Cope, Proc. Acad. Nat. Sci. Phila., 1871 (1872), p. 262 

 (type). 



Width of head 2^ in its length ; interorbital space 2| in head meas- 

 ured from tip of upper jaw. Body compressed, and dorsal edge 

 apparently rounded. Head compressed. Snout about as broad as 

 long, and rounded when viewed from above. Gill-opening reaching 

 tip of maxillary. Rakers 7 + 9?, little shorter than filaments, which 

 equal pupil. Each scale with about 5 strise. Tubes in lateral line 



