358 MEMOIRS OF THE CARNEGIE MUSEUM 



Cotypes, two specimens, 56-63 mm. Wismar. (C. M. Cat. No. 1035; I. U. 

 Cat. No. 11731.) 



Cotypes, two specimens, 51-64 mm. Christianburg. (C. M. Cat. No. 1036; 

 I. U. Cat, No. 11732.) 



Closely allied to P. anterior and P. abramis, but differing from both in the color 

 of the caudal peduncle and caudal. 



Head 4; depth 2.4-2.5; D. 11 ; A. usually 28 ; 19 scales 9 or 10-43 to 51 60 -7 or 8; 

 eye 2.5-3; interorbital 2.5-2.6. 



Elliptical; dorsal and ventral outlines similar, without prominent humps, the 

 profile slightly depressed over the eyes. Preventral area rounded, with small, 

 rather irregularly placed scales; postventral area narrowly rounded; predorsal 

 area narrow, with a linear median naked area. 



Occipital process equal to one-fourth of the distance from its base to the dorsal, 

 bordered by four scales on its sides; skull smooth in cross-section, very convex; 

 interorbital much broader than the eye in adult; frontal fontanel a little narrower 

 than the parietal; margin of second suborbital very convex, leaving a naked area, 

 which is widest below; maxillary equal to the eye; four or five teeth in the front 

 row of the premaxillary, the third 'withdrawn from the line of the rest; five gradu- 

 ated teeth in the second row, their denticles in shallow crescents: maxillary with 

 two or three minute teeth; dentary with four large teeth, abruptly followed by smaller 

 ones on the sides. 



Gill-rakers 8+11. 



Scales of the sides regularly imbricated; a few interpolated scales over the anal 

 muscles; anal sheath of a single row of scales along the base of the anterior rays; 

 caudal naked; a well-developed axillary scale; lateral line but little decurved. Each 

 scale of the sides with a few nearly parallel striae. 



Dorsal but little farther from snout than the ventral, nearer to snout than to 

 caudal, its margin rounded, the highest ray about 3.75 in the length, the penulti- 

 mate a little less than half as long as the highest. Anal emarginate, the second and 

 tenth reaching the base of the eighteenth when depressed; first anal ray below or 

 behind the base of the last dorsal ray. Ventrals not reaching anal, pectorals to 

 ventrals. 



Highly iridescent, blue above, greenish to silvery below; a club-shaped hori- 

 zontal humeral spot, its pointed anterior end from the upper margin of the first 

 scale of the lateral line along the row of scales above the latter to above the 



40 In those examined, one with 26, ten with 28, five with 29, three with 30. 



50 In those examined, one with 43, four with 44, two with 4.5, four with 46, four with 47, one with 51. 



