32 CALIFORNIA ACADEMY OF SCIENCES. 



Eye large, 2i in snout, 6J in head, 3 in interocular. 



Maxillary barbels reaching little beyond base of pectoral. 



Snout somewhat blunt, less decurved than in platypogon; 

 upper jaw slightly projecting; teeth villiform. 



Gill membranes forming a narrow fold across the isthmus. 



Vertical series of pores on the sides of the body. 



Distance of dorsal fin from tip of snout little more than 

 2| in the length, the spine 1| in the head. 



Adipose fin as long as the dorsal fin minus the fulcrum. 



Caudal widely forked, 3| in the length. 



Anal little longer than high, deeply emarginate. 



Metallic blue, shading into silvery below; inner surface 

 of the pectorals wholly blue-black except the posterior 

 margin which is light; ventrals lighter, similarly marked. 



Head 31; depth 5^; D. I. 7; A. 17. 



LOEICARIID.E. . 



I. Farlowella nom. gen. nov. 



Acestra Kner 1853, preoc. in Hem., Dall, 1852. 



"We have dedicated this genus to Dr. W. G. Farlow of 

 Harvard University. 



1. Farlowella gladiola (Giinther). 



2. Farlowella carinata Garman MS., sp. dov. 



Types, Nos. 7742; 7769; 7770; 7771; 7773; 9830; fifteen specimens, 

 .10-. 22 m. to base of caudal. Santarem; Tefte; Guriipa; Obidos; 

 Jutahj^; Tabatinga. 



Body little depressed, subterete; tail much depressed. 

 Snout long, greatly varying in length in specimens from 

 different localities; upper margin of gill opening equidis- 

 tant from tip of snout and somewhere between the posterior 

 end of dorsal fin and posterior margin of third scute behind 

 the dorsal fin; plates along margin of snout finely granular, 

 or swollen at center and more coarsely granular. Temporal 

 plate with coarse vermiculating ridges. Interorbital fiattish. 



