358 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Coloratiou in life: light brownish, with some greenish shading on sides 

 and bluish-green on caudal peduncle; fins all bright blue; snout and 

 forehead bluish ; orbits surrounded by radiating dots and dashes of 

 ^eeu. In spirits: a yellowish area below and in front of eye; upper 

 edge of dorsal and lower edges of caudal, anal, and ventrals yellowish, 

 as is the lower side of the head. 



Head, 3 in length ; depth, 2^. D. IX, 10 ; A. II, ; Lat. 1. 21. 



This species is very common in the rocks about Mazatlau, where it is 

 called Lor a or PerricOj both words meaning parrot. It is seldom caught 

 and is not eaten, One si)ecimen, 23 inches in length, was procured, and 

 is the type of the species. 



*22. Pomacanthus crescentalis, sp. nov. (28139.) 



Subgenus Fomacanthodes G-ill; allied to Pomacanthus zonipeetus (G-ill) 

 d-thr. 



Body broadly ovate, with short and slender caudal peduncle. Head 

 ■deeper than long, the profile very steep and uneven; a bulge above 

 the occiput, another above the eye, and another at the premaxillaries, 

 the interspaces between these concave. Ej'e broader than preorbital, 

 -3 J in head (in the largest specimen), its diameter half the width of the 

 •cheeks below it. Ej'es proportionally larger in smaller specimens. Ver- 

 tical limb of preopercle minutely serrate, the spine at the angle about 

 as long as pupil. Mouth small, with broad bands of setiform teeth as 

 in other species. Length of mandible half greater than diameter of eye. 

 Oill-rakers very short; gill-membranes narrowly joined to the isthmus. 



Dorsal spines rapidly graduated, the last (eleventh) spine two-thirds 

 to three-fourths length of head, three-fifths the height of the soft rays 

 of dorsal. Anal spines long, stronger than those of dorsal, rapidly grad- 

 uated. Soft rays of anal lower than those of dorsal, the outline of the 

 fin rounded. Soft dorsal highest towards the front, the rays more rap- 

 idly shortened posteriorly than those of anal. Caudal peduncle deeper 

 than long, the fin somewhat rounded. Pectoral fins short, reaching 

 scarcely past vent, a little shorter than head. Yentrals elongate, the 

 first ray filamentous ; the fin one-third longer than head, reaching third 

 anal spine. 



Head everywhere scaly, the scales of head, breast, and front of back, 

 very small; anteriorly reduced to shagreen-like roughness, as in Poma- 

 oatithus arcuatus. Scales of body irregular in size, very rough ; large 

 and small ones closely intermixed. 



Head 3^ in length ; depth" 1^. D. XI-23 ; A. Ill, 22 ; Lat. 1. ca. 70. 



Color brownish-black, becoming pure black on dorsal and anal fins ; 

 top of head with a median line of bright yellow which divides on the 

 snout, a branch passing down on each side of mouth, the two meeting, 

 •or nearly meeting, on the throat ; a small white spot on chin ; sides with 

 .five very distinct narrow bright yellow cross-bars, strongly convex for- 



