ON SPECIES OF GASTEROPELECUS. 9 
a brown spot on the anterior rays of the dorsal, and another 
in the brownish color of the interior or central rays of the 
pectoral. 
Gasteropelecus pectorosus sp. n. 
D. 15-16, A. 36-40, L. 1. 21 (19-22). 
The specimens to which this name is given are readily 
separated from the preceding by the difference in shape. 
In those of equal length, when compared with G. stella- 
tus, G. pectorosus is found to be one-fifth deeper from 
back of head to lower edge of sternal expansion, the an- 
terior edge of the latter approaching the vertical and be- 
ing more nearly straight. Or, if specimens of equal depth 
are compared, G. stellatus is seen to be one-third the 
longer. As far as may be determined from the descrip- 
tion of G. securis, of Filippi, its shape approaches that of 
G. pectorosus; the former is possessed of a larger num- 
ber of rays (44) in the anal fin. In the Litter the pecto- 
rals reach farther back than the base of the dorsal. Meas- 
urements from those taken at Manacaponru make the length 
of one, to base of caudal, two and one-fourth, and the depth 
one and seven-eighths inches. Of another, the length is 
one and seven-eighths inches and the depth one and one- 
fifth. Secured at Cudajas, Lago Alexo, Obidos, Taba- 
tinga and Manacapouru. 
Gasteropelecus fasciatus sp. n. 
G. strigatus St. 
D. 10, A. 25-27, L.l. 30-32. 
The outline of this fish is similar to that of G. sternicla 
but it is readily distinguished by its markings. Along 
the anal margin at the base of the fin there is a narrow 
band of dark color ; parallel to this and half way to the 
base of the pectoral there is a broader band of similar color ; 
ESSEX INST. BULLETIN, VOL. XXII 1* 
