348 PROCEEDINGS OF THE ACADEMY OF [1899. 



SERRANID^. 



49. Acanthistius pictus (Tschudi). 



Plectropoma pictum Tschudi. Fauna Peruana, .5, 1844 [Peru] ; Kner, 

 Neue Fische aus Museum Godeft'roy, 2 (Sitzb. Ak. "Wieu. Ivi, i, 

 1867, 710) [Iquique]. 



Alphcstes pictus Jordan and Swain, Proc. U. S. Nat. Mu3., 1834, 395. 



Acanthistius inctus Boulenger, Fishes of Brit. Masenni, i, 140, 1895 

 [Chile] ; Steindachner, Fauna Chilen.sis, 282, 1898 [Iquique]. 



A Chilean species, rare aloug the Peruviau coast. 



50. Mycteroperca xenarcha Jordan. 



Mycteropercct xenarclia Jordan, Proc. Acad. Phil., 1837. 337 [Gala- 

 pagos islands] . 

 EpinepJielus xenarchus Boulenger, Cat. Brit. Mus., i, 2G6, 1895. 



Galapagos island, to Payta, Peru. 



51. Paralabrax humeralis (CavierandValeucienues). 



Serranus humeralis Cuv. and Val., Hist. Nat. Poiss., ii, 246, 1828 



[Chile] ; Gav. Hist. Chile, Zool., ii, 149, 1847 ; Kner. Neue 



Fische aus Mus. Godef., 4, (Sitzb. Ak. Wiss. Iviii, i, 1863) [Peru]: 



Boulenger, Cat. Brit. Mus., i, 278, 1895. 

 Serranus semifasciatus Gay, Hist. Chile Zool., ii, 151 (plate I bis. fig. 



2), 1847 [Juan Fernandez] (copied by Jordan and Eigenmanu, 



390, vide infra) . 

 Pcrcichthys godeffroyi Gunther, Jour. Mus. Godeffr., i, H. 2, 97, 1873 



[Iquique]. 

 Paralabrax humeralis Jordan and Eigenmann, Bull. U. S. Fish 



Comm., viii, 389, 1890. 



Local name, Cahrilla. 



The collection contains four specimens of this species. There is 

 evidently some variation in coloration between representatives from 

 different localities, though there is no reason for confounding hume- 

 ralis with the very distinct though closely allied form P. albomacu- 

 latus from the Galapagos Island. ^^ 



Compared with specimens from the type locality, aside from the 

 very striking and constant difference in color markings, alhomacu- 

 latm differs from the present species in having a consideral)ly nar- 

 rower interorbital width, narrower pectoral, smaller eye, and lunate 

 (sometimes almost truncate) instead of forked caudal. 



The specimens described by Kner {I. c. ) from Peru, as Serranus 

 humeralis (var. ?) doubtless belong to an unnamed sisecies. 



Head 2h, depth 4|-, eye of . Gill rakers 10 + 21. Lateral line 

 (pores) 62-67. Color somewhat obscured by alcohol, very dark 

 above; broad bands along sides. Opercle dark with lighter spots. 

 Ventrals and middle rays of caudal dai'k. Soft dorsal mottled. 



'6 Boulenger, Cat. Brit. Mus., i, 278. 



