FISHES OF WEST COAST OF PERU. 49 



in the regions occupied by the patches of teeth in the cotype of B. 

 jordani. 



Type of B. regillus: A few minute, very short bristles (teeth) on 

 the vomer. 



Cotypes of B. regillus: {a) Small teeth in tAvo rather indefinitely 

 outlined patches, one on each side of the vomer. (6) No teeth. 

 Vomer with enlarged, rough surfaces in the region occupied by teeth 

 in (a), {c) A few minute, scattered teeth on vomer, {d) An elon- 

 gate patch of a few small teeth on each side of the vomer. Four 

 comparatively strong teeth on anterior, central part of bone. 



(In all of these specimens the vomer has been more or less severely 

 scraped, as if an attempt to detect teeth by rubbing with a sharp 

 instrument had been made.) 



Eegarding Basilichthys affiriis, Abbott writes : " This species ap- 

 parently closely resembles the preceding. It appears to differ from 

 B. jordani in the absence of vomerine teeth, and from jordani^ regil- 

 lus^ and octavius in the much shorter head and in position of the 

 first dorsal. Steindachner's description of an example from Callao 

 and our own specimens indicate that these differences do not exist." 



71. BASILICHTHYS OCTAVIUS Abbott. 



Basilichthys octavius Abbott, Marine Fishes of Peru, Proc. Acad. Nat. Sci. 

 PMla, 1899, p. 340; Callao. 



Family MUGILIDAE. 



THE MULLETS. 



KEY TO GENERA. 



a\ Orbit with a well-developed adipose eyelid, covering part of the iris ; cilia 

 in one or few series, slender ; cleft of mouth chiefly anterior — Mvgil, p. 49. 



a\ Orbit without distinct adipose eyelid ; jaws with small labial, ciliiform, 

 pectinate, movable teeth, in two rows, often traces of a third row 

 present Neomyxtis, p. 51. 



Genus MUGIL (Artedi) Linnaeus. 



72. MUGIL CEPHALUS Linnaeus. 

 LIZA; LICIT A. 



Mugil cephalKS Linnaeus, Syst. Nat., ed. 10, 1758, p. 316. — Jordan and 

 EvEBMANN, Fish. Nortli and Mid. Araer., vol. 1, 1896, p. 811. — Stein- 

 DACHNER, Fauna Chilensis, 1898, p. 315. — Abbott, Marine Fishes of 

 Peru, Proc. Acad. Nat. Sci. Phila., 1899, p. 343.— Delfin, Cat. Peces de 

 Chile, 1901, p. 48. — Steindachnee, Plerpet.-ichthyol. Ergebnisse einer 

 Reise nach Siidamerika, Denkschr., Akad. Wiss. Wien, vol. 72, 1902, p. 

 40. — Jordan and Evermann, Fish. Hawaiian Islands, Bull. U. S. Fish. 

 Comm., vol. 23, pt. 1, 1903, p. 140, fig. 48. 



