ElGENMANN AND VaNCE: SpECIES OF FaRLOWELLA. 299 



I. Farlowella oxyrhyncha (Kner). 



C. M. No. 3788, seven, 150-175 inin., San Joaciuin, Sept. 5, 1909. 



Haseman. 

 C. M. No. 3789, one, 104 mm., \'illa Ha}'s, Paraguay, April 11, 1909. 



Haseman. 

 C. M. No. 3790, one, 98 mm., Sao Antonio, Rio Madeira, Nov. 3, 1909, 



Haseman. 

 C. M. No. 3791, one, 88 mm., Santarem, Dec. 15, 1909. Haseman. 

 C. M. No. 3792, one, 153 mm.. Maciel, Rio Guapore, July 30, 1909. 



Haseman. 



Length of head to end of opercle three and four-fifths to four times 

 in the length; distance between occipital and dorsal five and one-quarter 

 to five and one-half in the length; width of head three and one-half 

 to three and three-quarters in its length to end of opercle; interorbital 

 four and three-quarters to five and one-fifth times in head; eye about 

 fifteen times in the head; length of produced part of snout three to 

 three and three-tenths in the distance from its tip to the anus; usually 

 seven plates between the occipital and dorsal, rarely six (in one 

 specimen); Regan gives the number of plates as eight. 



2. Farlowella azygia Eigenmann & Vance, sp. nov. (Plate XXIX, 



figs. 1-2.) 



C. M. No. 3782, type, 79 mm., Santarem. Haseman. 



Head threeand three-fifths in the length ; width of head three and one- 

 half in its length; eye thirteen times in head; interorbital six and one- 

 half times in head; snout beyond naked area about mouth two and 

 three-fifths in the distance from its tip to the anus, two and one-half 

 times as long as the postorbital portion of the head; distance between 

 supra-occipital and dorsal seven times in the length. 



Sides of head without bristles; scutes 15-I-18, six between occipital 

 and dorsal; abdomen with a median series of plates; outer caudal lobes 

 produced, each lobe with a dark stripe; a dark streak from snout 

 along sides to posterior part of body. 



3. Farlowella smith! Fowler (Plate XXIX, figs. 3, 4). 



Farlowella smithi Fowler, Proc. Acad. Nat. Sci. Phila., LXV, 1913 (1914). 574. fig- 

 24. 



C. M. No. 3783, type, one, 64 mm. long, from Villa Bella, Brazil. 

 Haseman. 



20 MARCH 20, 191 7. 



