198 



CALIFORNIA ACADEMY OF SCIENCES 



In nine specimens from Mazatlan (including the type of P. 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. woolmanni 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. woolmanni is accompanied by the closely 

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

 gill-rakers, the more numerous iin-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. magdahnce Abbott (Jordan & Evermann, 1898, p. 2871), is a 

 synonym of P. cestuarius. We have compared 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 



Panama 



272 

 2ig 

 284- 



6^ 

 14 

 5 



45 

 12 



2 A 

 24 

 8i 



14 

 13 

 13 



270 

 219 



29i 



6+ 



14+ 



5 + 



2i 



461 

 12 + 



2| 



235 



9 



i4i 

 13 

 13 

 i5i 



Guaymas, 

 Mex. 



260 



208 



2f>\ 

 7 



15 

 5i 

 2^ 



471 



12J 



2i 

 24 



14 



I2i 



12 



15 



