1894.] lOo [Cope; 



Scales 28 . Fin radii, D. XIV. 10 ; A. III. 8 ; two out of seven speci- 



T 

 mens with the dorsal spines XIII, and two with the soft rays of the anal 



9. Caudal fin truncate. Greatest depth entering length, minus caudal 

 fin, 2.0 times ; length of head in same three times. Diameter of eye 

 entering head three times. Pectoral fin reaching first soft ray of anal. 



Color brown, each scale with a paler centre. The spotting is similar 

 to that of the G. gymnogenys except that the dorsal region is dusky and 

 without well defined spots, the saddle shaped black spot in front of the 

 dorsal only remaining. Below the lateral line on the middle of the side 

 is a strongly defined spot, and traces of one behind the epiclavicle are also 

 visible. A dark bar below the orbit, which is absent from most of the 

 specimens, which have been somewhat bleached by alcohol. Fins 

 spotted as in G. gymnogenys. 



Total length, 95 mm.; length to base of caudal fin, 72 mm.; length to 

 base of anal, 48 mm.; length to base of ventral, 26 ram; length of head on 

 side, 24 mm. 



Seven specimens. This species is near the G. gymnogenys, but differs 

 much in the form of the head and body, and in the number of the rays of 

 the dorsal fin. 



Geophagus brachyurus sp. nov. 



Anterior border of orbit about as far from the end of the muzzle, as 

 from the convexity of the opercular border. Preorbital bone distinctly 

 longer than diameter of tegumentary orbit. Profile straiglit, slightly 

 concave at orbit. Form of body to caudal peduncle an oblong oval. 



3U 

 Cheeks with five rows of scales below orbit. Scales 2-3 . Fin radii, D, 



XIV. 9 ; A. in. 8. In two specimens the dorsal rays are XV. 9 and XIII. 

 10 ; and in the latter specimen the anal rays are III. 9 ; in a thin speci- 

 men the anal rays are III. 7. Caudal fin truncate. Greatest depth 

 entering the length, minus the caudal fin, 2.2 times; length of head enter- 

 ing the same 2.75 times. Diameter of eye entering side of head four 

 times. 



Color in alcohol brown, the dorsal and anal fins blackish. The color 

 of the spinous part of the former is varied by the presence of oblique spots 

 of a pale color, which form stripes running upwards and backwards. 

 Tliese transparent spots are wanting on the anal fin. A black spot at 

 base of first dorsal rays ; another below the lateral line below the middle 

 of the spinous dorsal and a black bar below the eye. 



Total length, 97 mm.; length to base of caudal fin, 75 mm.; length to 

 base of anal, 52 mm.i length to base of ventral, 35 mm.; length of head, 

 28 mm. 



Five specimens. This species is well distinguished from the species 

 previously described, by the smaller eye, and an abbreviation of the body 



PROC. AMER. PHILOS. SOC. XXXIII. 144. N PRINTED MARCH 5, 1894. 



