FISHES OF SINALOA. 489 



largely pale blue, especially toward the tail; faint traces 

 of numerous dark cross -bands. Fins dusky olive, the 

 pectoral and first dorsal paler, base of pectoral dusky. 

 Type No. 1656 L. S. Jr. Univ. Mus. 



190. Pachynathus capistratus (Shav^). Coche. 



Common in rocky places about the islands of the Ven 

 ados, Creston and Isla Blanca; many specimens obtained. 

 This species was found by Gilbert at Mazatlan, and by 

 Steindachner at Cape San Lucas. We have thus far 

 been unable to find any distinction between the American 

 form and the common East Indian species, to which the 

 name capistratus was first given. Two markedly differ- 

 ent types of coloration were obtained, supposed by us to 

 be of the two sexes, since no other difference except 

 that of coloration is noticeable. In all specimens ob- 

 tained, however, the sexual organs were so immature 

 that the sexes could not be distinguished thereby. 



Specimens supposed to be female dull olive with darker 

 clouds; no yellow on posterior parts which are scarcely 

 paler behind; fins all plain olive blackish; streak behind 

 mouth light bluish, very faint, soon fading after death; 

 lower lip blue, then golden, then a blue ring, then yel- 

 low, then bluish; upper lip livid, bluish above. 



Others supposed to be male are in life dark olive 

 clouded with darker; posterior part of body deep yellow, 

 below median line; fins blackish; first dorsal bright olive 

 yellow on membranes; green on caudal membranes, the 

 rays black. Anal reddish. Streak behind mouth bright 

 red in one specimen, whitish in another. Upper lip livid 

 blue then orange, then golden, then livid blue or purplish, 

 then orange, then crimson, then dark. 



Still other specimens were marked with whitish shades 

 instead of red. 



2d Seb., Vol. V. ( 32 ) August 15, 1895. 



