300 Annals of the Carnegie Museum. 



One small specimen probably belonging here. D. I, 5; A. I, 5; 



P. I, 5; V. I, 4- 



Head three and one-fifth in length; width of head three and one-half 

 in its length; eye twelve times in head; interorbital six in head; 

 snout beyond naked area about mouth two and seven-tenths in the 

 distance from its tip to the anus, two and one-quarter times as long 

 as the postorbital part of the head; distance between supra-occipital 

 and dorsal six and four-fifth times in the length. 



Sides of head without bristles; snout swollen and rounded at end. 

 Scutes 15 + 18, seven between supra-occipital and dorsal; abdomen 

 with a median series of plates. 



4. Farlowella kneri (Steindachner). 



C. M. No. 3786, one, 130 mm., Caceres, May 23, 1909. Piaseman. 

 C. M. No. 3787, two, 106-120 mm., Rio Jaura, June 3, 1909. Hase- 



man. 



Length of head to end of opercle from four to four and two-fifth 

 times in the head; distance from occipital to dorsal five and onfe-fifth to 

 five and one-third times in the length ; width of head three and one-third 

 times in its length, interorbital four and a half times; diameter of eye 

 ten to thirteen times in head; length of produced part of snout three 

 and three-quarters in the distance from its tip to the anus; seven or 

 eight plates between the occipital and the dorsal; upper caudal lobe 

 black, a narrow oblique black bar across the lower lobe beyond the 

 tip of the middle rays. 



5. Farlowella jauruensis Eigenmann & Vance, sp. nor. (Plate XXX, 



fig- 3-) 

 C. M. No. 3780, Type, 133 mm., Jaura, June 2, 1909. Haseman. 



Head four times in the length ; width of head two and three-fifths in its 

 length; eye eleven times in the head ; interorbital five times in head; 

 snout beyond naked area about mouth four and one-fifth in the dis- 

 tance from its tip to the anus, one and one-half times as long as the 

 postorbital portion of the head; distance between supraocci[)ital and 

 dorsal five and one-half in the length; anterior margin of orbit raised, 

 snout slightly enlarged and rounded at end; anterior part of head 

 depressed laterally; sides of head with a few minute bristles; scutes 

 15 + 19, six between the occipital and dorsal; abdomen with a median 

 series of plates; outer caudal rays greatly produced, each lobe with a 



