692 EIGENMANN— SIXTEEN NEW PYGIDIID^. 



the distance from the first ray to the caudal 1.34 in its distance from 

 the snout. 



Middle of sides with a series of faint, large spots, similar but 

 smaller spots along the back. 



2. Hatcheria titcombi spec. nov. 



Pygidmni areolatum Everman & Kendall (non Cuv. & Val.), Proc. 



U. S. Nat. Mus., XXXI., 1906, p. 86. (Rio Comajo ; tributary 

 of Lake Traful, tributary to Rio Limay.) 

 II 1 10 I., type, 164 mm. Arroyo Comajo. J. W. Titcomb. 



This specimen is one of those mentioned by Everman and Ken- 

 dall. It differs from the areolatum as described by Cuvier and 

 Valenciennes, whose specimen came from Chile, west of the Andes. 

 The origin of the dorsal is further back, and its last ray is beyond 

 the last ray of the anal. 



Head 6.33; depth 6.5; D. 17.5 (3+14.5) ; A. 9.5 counting the 

 minute imbedded rays in each case; P. 9; front margin of the eye 

 in the middle of the head ; interocular a little over three in the 

 length of the head, eye three in the interocular. Teeth very narrow 

 chisels ; nasal barbel reaching to above first preopercular spines, 

 maxillary barbel to middle of opercular spines. Pectoral rounded, 

 its first ray not prolonged, nearly two thirds the length of the head; 

 origin of the ventrals equidistant from snout and last fifth of the 

 middle caudal rays ; first anal ray under the sixth dorsal ray, the last 

 anal ray under the fourth from the last ray of the dorsal; distance 

 between anal and caudal 4.75 in the length ; origin of dorsal equi- 

 distant from tip of caudal and middle of pectorals, its distance from 

 the caudal two in its distance from the snout. 



Sides without distinct markings ; faint traces of longitudinal 

 lines. 



3. Pygidium heterodontum spec. nov. 



13832 I., type, 83 mm., 5, Rio Mendoza, Palmira, Argentine, 900 m. 

 Purchased from Rosenberg. 



Palmira is probably the southernmost locality on the eastern 

 slope of the Andes from which species of this genus have been 

 taken. 



