Jordan and Evermann. Fishes of North America. 1855 



a. Base of pectoral broad, the fin fan-shaped. 



b. Snout naked above as is the interorbital space. 



c. Eleventh dorsal spine nearly as long as twelfth ; maxillary 2 in head; inter- 

 orbital space 10 in head; eye 3 in head (young specimen). Uniform 

 rosy, intermingled with pearly white. MACROLEPIS, 2248. 



cc. Eleventh dorsal spine as long as twelfth. 



d. Eye 5 in head; maxillary reaching f across eye; head 4 in total 

 length; spinous dorsal low; pectoral pointed; supraorbital ten- 

 tacle 5 in total length ; carmine red, without marblings. 



CASTOR, 2249. 



dd. Eye 4 in head; maxillary reaching anterior third of orbit ; spinous 

 dorsal high ; pectoral rounded ; carmine red, with vertical rosy 

 bands. POLLUX, 2250. 



bb. Snout fully scaled above ; iuterorbital space with few scales, top of head other- 

 wise entirely scaly. RATHBUNI, 2251. 

 act. Base of pectoral narrow. 



e. Head without filaments ; nape and top of snout scaly ; ventrals reaching vent. 



Pectoral rays 16. LONGISPINIS, 2252. 



ee. Head with simple slender filaments ; top of head, including interorbital spfxe 



and top of snout, entirely scaled; ventrals not reaching vent. Pectoral 



rays 18. SIERRA, 2253. 



2248. PONTIMJS MACROLEPIS, Goode and Bean. 



Head about 2; depth about 3 ; depth of caudal peduncle equal to snout. 

 D. XII, 10 ; A. Ill, 5 ; P, 17. Width of head about 2 in its length. Scales 

 6-22 (tubes)-lO. Interorbital space deeply concave, 2 in snout, 10 in head. 

 Eye about 3 in head (in a young individual). Post orbital part of head 

 2 in distance from tip of snout to origin of spinous dorsal. Maxilla 

 reaching beyond middle of eye, 2 in head ; mandible reaching to posterior 

 border of eye, about 2 in head, equal to length of ventral fin. Teeth in 

 villiform bands on jaws, vomer, and palatine; a naked space at symphy- 

 sis of intermaxillaries, into which fits a projecting spur at tip of mandi- 

 bles; mandible with slight symphyseal knob and 3 large pores along 

 middle of its surface. Nasal, preocular, supraocular, postocular, tym- 

 panic, parietal, and nuchal spines present; a paroccipital spine and 2 

 numerals; 2 stout, flat spines on opercle, 4 on preopercle, uppermost 

 largest, and with supplementary spine at its base, third larger than sec- 

 ond or fourth. Suborbital carina consisting of 3 spines; 2 on preorbital, 

 both bending backward. Four rudiments and 2 developed gill rakers 

 above angle, 9 developed rakers on anterior limb of arch, developed 

 rakers with small knob at tip. Preocular filament very short ; supraocular 

 filament about 3 in eye. Anterior nostril tubular, with thin narrow flap ; 

 distance between anterior nostril and eye equals interorbital width; pos- 

 terior nostril not tubular. Scales larger than in Pontinm lonyispinis or 

 castor. Iuterorbital space and top of snout scaleless; head otherwise 

 entirely scaly. Distance of dorsal from tip of snout twice the maxilla; 

 first spine f of second ; third longest, about 2| in head ; penultimate spine 

 about 5, and last spine 4 in head; first and last spines equal; longest ray 

 about 3 in head; caudal almost truncated, middle rays about 2 in head; 

 anal origin under second dorsal spine, length of base 4 in head ; first spine 

 about 2| in second ; second 2g in head; third shorter than second, about 



