436 PROCEEDINGS OF THE ACADEMY OF [May, 



Color when fresh in rum largely deep slaty-dusky or blackish, below 

 whitish. A pale or whitish streak along 1. 1. to middle of caudal base 

 bifuracating on caudal base to form a semi-ocellus at base of each 

 caudal lobe. Posteriorly on caudal base this whitish bifurcation 

 still margined dusky or blackish. Head and casque above mostly 

 tinted olivaceous-dusky. Along each side of back, from below base 

 of rayed dorsal about a dozen transverse series of very small white 

 round spots, and in each series many as 4 or 5 sometimes, but only 

 lower 2 of each at all distinct or conspicuous. Iris brownish. Lips 

 whitish. Barbels whitish basally, otherwise grayish, though maxil- 

 lary a little more brownish. Dorsal whitish, basally blackish, spine 

 pale, and rays distally dusky. Adipose fin whitish. Caudal largely 

 dusky to blackish, rays a little paler than membranes. Anal whitish, 

 anterior longer rays medianly slightly dusky. Pectoral largely 

 whitish, grayish above. Ventral whitish. 



Length Ih inches. 



Type No. 37,876, A. N. S. P. Pedernales, Venezuela. January 

 26th, 1911. F. E. Pond ami Stewardson Brown. 



Head 3| to 4; depth 4 to 5; D. i, 5; A. iii, 16 to hi, IS; snout 3§ 

 to 3+ in head; eye 3f to 44; mouth width 2^; interorbital If to 2; 

 length 7J to Sf inches. The dorsal and pectoral spines are quite 

 variable and all much shorter than in the type. Nos. 37,877 and 

 37,878, A. N. S. P., paratypes, same date as type. 



This species is related to P. guppyi Regan, but differs in the com- 

 plete dark lateral band longitudinally below the 1. 1. 



(Niger, black; linea, line; with reference to the complete black 

 infero-lateral band . ) 



LQRICARIID^. 

 Plecostomus verres (Valenciennes). 



Two from Pedernales on January 27th. 



CALLICHTHYID^E. 

 Hoplostemum littorale (Hancock). 



One adult from La Pedrita, on the Cano Uracoa, on February 16th. 



Hoplostemum thoraoatum (Valenciennes). 



One small example with the last. 



PCEOILIIDiB. 

 Anableps microlepis Mailer and Troschel. 



Three from Pedernales on January 25th. 



