290 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



28. Percichthys altipinnis Regan. 



(Plate XXX VII, Fig. i.) 



Percichthys altipinnis Regan, Revue Suisse de Zoologie 13, 390, 1905 

 (Rio Colorado, Buenos Aires). Dorsal x-xi-i, 1 1 ; Anal iii, 8 

 or 9 ; scales 8-66 to 72-23. 

 Depth 3.5-3.66; head 3.6-3.75; eye 5-5.33 in the head, interorbital 

 4.33-4.66 in the same. Maxillary extending a little beyond the margin 

 of the eye ; preorbital finely serrate ; vertical limb of preopercle finely ser- 

 rate, the angle armed with 2 or 3 spines and with 4-7 antrorse spines on 

 the lower limb ; a strong spine at the opercle ; 3-5 spines at the clavicle 

 above the base of pectoral ; supraclavicle fine serrate ; third dorsal spine 

 longest, measuring f of the length of the head ; second anal spine longest, 

 f of the length of the head. Olivaceous. 



This species is known only from the types. It is the most northern of 

 the eastern species. 



14. PERCILIA Girard. 



Percilia Girard, Proc. Acad. Nat. Sci. Phila., VII, 1854, 197 and U. S. 

 Naval and Astron. Exped. 235 [gillissi). 



Type: Peni/ia gi/tissi G'wdLvd. 



This genus does not belong to the tropical American fauna. Nor has 

 it been taken in Patagonian waters. Its affinities are Patagonian. Its 

 southernmost recorded habitat is the Rio Itata directly opposite the source 

 of the Neuquen, the northern source of the Rio Negro. I have not seen 

 the species and have drawn on Boulenger's account of it. 



29. Percilia gillissi Girard. 



(Plate XXXVI, Fig. i). 



Percilia gillissi Girard, Proc. Acad. Nat. Sci. Phila., VII, 197, 1854 (Rio 

 de Maypo) ; Girard, U. S. Nav. and Astron. Exped. 236, pi. xxix, 

 figs. 5-9, 1856 (Rio de Maypo) ; Giinther, Cat. Fish. Brit. Mus. I, 

 255, 1859; Boulenger, Mem. Soc. Sc. Chile, IV, 15, 1894; Boulenger, 

 Cat. Fish. Brit. Mus. I, 121, 1895 (Itata); Delfin, Catalogo Feces 

 Chile 59, 1901 (Maipu and Itata; Pline). 



Perca segethi V\\\\\-^Y^, Wiegm., Arch. 1863, 211 (Santiago, Chili). 



Percilia gracilis Philippi, Mb. Akad. Wiss. Berl. 1866, 708 (Rio Reine, 



