198 



CALIFOKNIA ACADEMY OF SCIENCES 



In nine siiecimens from Mazatlan (including the type of /'. sinaloa;), the gill- 

 rakers on horizontal limb of arch are constantly thirteen or fourteen in number, and 

 the fin rays as follows: 



Dorsal.. 



Anal ... 



76 



61 



The longest gill-raker in P. ivoolmanni is two-fifths to one-third as long as the 

 diameter of the eye; on the vertical limb of the arch 4 or 5 are usually present, 1 or 

 2 of which may be immovable and rudimentary. 



In the northern portion of its range, P. woobnanni is accompanied by the closely 

 related P. cestuarius, which differs in its more elongate form, the longer, more numerous 

 gill-rakers, the more numerous fin-rays, and the lighter, more nearly uniform coloration; 

 a row of distinct small white spots follows the contour of the body, near the base of 

 the vertical fins. P. magdalence Abbott (Jordan & Evermann, 1898, p. 2871), is a 

 synonym of P. cestuarius. We have comj^ared the types of the two species. 



Measurements in Hundredths of Length without Caudal. 



Locality 



Total length in mm 



Length to base of caudal in mm 



Head (without opercular membrane)... 



Snout (to upper eye) 



Maxillary 



Upper eye 



Interorbital width (total) 



Greatest depth 



Depth of caudal peduncle 



Longest gill-raker 



Length of caudal 



Length of ventral 



Length of pectoral 



Longest dorsal ray 



Longest anal ray 



Chord of arch of lateral line 



