eigenmann: fresh water fishes. 287 



types of Pevcichthys vinciguerrc^ Perugia and also a specimen of nearly 

 the same size of P. Icevis — tritcha. The species is very closely allied if 

 not identical with triicha. The characters on which Perugia laid stress as 

 distinguishing this species are not present in the type sent me. Other 

 characters which readily distinguish this specimen are different according 

 to Perugia, in other specimens of viiicigneyrcc. The only characters dis- 

 tinguishing the type of viucigneyrce sent from the specimen of trucha of 

 nearly equal size are the following : 



a. Head and sides plain in color ; depth 4| in length to caudal ; lat. 1. 70 (about) ; highest 

 dorsal spine more than half length of head. vinciguerrce. 



aa. Sides of head, above line back from angle of mouth, and sides of body spotted ; depth 4 in the 

 length ; lat. 1. 65 ; highest dorsal spine less than half length of head. trucha. 



The extent of the maxillary made use of by Perugia is not diagnostic. 

 Taking the distance from tip of snout to end of maxillary with dividers 

 and comparing it with distance of tip of snout from eye, it is found that in 

 the three specimens of trucha collected by Hatcher and the trucha and 

 vinciguerrcE collected by the Italian expedition : 



1. Hatcher specimen ; maxillary reaches middle of eye. 



2. Hatcher specimen ; maxillary reaches to anterior margin of pupil. 



3. Hatcher specimen ; maxillary reaches to anterior margin of pupil. 



4. P. Icevis collected by Italian expedition ; maxillary reaches posterior 

 margin of pupil. 



5. P. vincignerrcB ; maxillary reaches to middle of pupil. 



The number of spines on the lower limb of the left preopercle of the 

 five specimens are respectively 8, 11, 8, 11, 11. 



The scales in the lateral line are 61, 65, 59, 65, 70. 



The greatest depth of body in the length to base of caudal is respec- 

 tively 4, 4, 4, 4, 4f, the specimen of vinciguerrce being distinctly more 

 slender than the others. I am inclined to think that the depth "3^ " of 

 Perugia must be a misprint for 4)^ . 



In a specimen collected by Hatcher with a length of 210 mm. the 

 highest dorsal spine is equal to half the length of the head ; in a specimen 

 160 mm. long it is equal to the head less the opercle. 



Elongate slender, deepest in space between base of ventrals and first 

 dorsal spine ; maxillary reaching to below middle of pupil, 3 in the head ; 

 teeth as in trucha ; squamation of head similar to that of trucha but the 

 occipital crest and parietals striate and naked (in this specimen only?); 



