1492 Bulletin ^7, United States National Museum. 



with light blue ; these bands and spots singularly arranged ; 2 of these 

 bands on the head, crossing preopercle ; 2 others on preorbital ; 5 on body 

 and caudal peduncle, composed of large, more or less confluent, roundish 

 spots, the 2 below the spinous portion of the dorsal terminating above in 

 a pair of large spots; caudal with similar oceilated spots, the pale color 

 appearing as reticulations around them; 2 large ocelli on anal; a brown 

 band across the inner side of base of pectoral. Length 14 inches. Cape 

 San Lucas to the Galapagos Islands; not rare about rocky islands; an in- 

 teresting and curiously colored hsh. Here described from specimens from 

 the Revillagigedos; the young unknown, unless C. hetairriis should be the 

 young as has been supposed, {rivulattts, marked by rill-like streaks.) 



Cirrhites rivulatus, Valenciennes, Voyage Venus, Poiss., 309, pi. 3, flg. 1, 1855, Galapagos 



Islands. 

 Cirrhitichthys rivulatus, GOnther, Fish Centr. Am., 421, pi. 86, fig. 4, 1868. 



1878. CIRRHITES BETAURUS, Gill. 



Head2|; depths. D. X, 11; A. Ill, 5. Prcoperculum serrated behind. 

 Eye (in young) 3^ in head, equal to snout. Fourth dorsal spine longest 

 and equals ^ of the total length; second anal spine largest, equaling the 

 fourth dorsal one; longest soft ray 6| in total length; caudal fin slightly 

 emarginate and nearly -}, of the length; produced pectoral ray rather ex- 

 ceeding i of the length, and the ventral fin enters 5A^ times in the same. 

 Color pale yellowish on the body, blackish on the shoulders and from 

 the dorsal fin to the eyes, and with 4 complete, oblique, blackish bauds; 

 the first under the middle of the spinous dorsal, the second under the last 

 spine, the third under the middle of the softMorsal, and the fourth encir- 

 cling the caudal peduncle; head with 3 lateral bands, 1 on the ])reorbital 

 region, a second on the cheek, and third on the posterior margin of the 

 prcoperculum; operculum with a buigitudinal oblong spot; chin with 4 

 spots forming the angles of a rhomb, and there is another one behind, on 

 the branchiostegal membrane near the margin; spinous dorsal margined 

 with blackish, and the 2 bands beneath more or less ascend on it; anal 

 blackish; caudal with a blackish B-shaped mark and a band at its base 

 divided by the lateral line; pectoral dusky, with a black spot at its base 

 nearly surrounded by a clear area, and separated from a spot in front of 

 the base; ventrals blackish, with nearly transparent sides and margin. 

 Rock pools between tide maiks about Cape San Lucas and Mazatlan; 

 abundant; a very active and strikingly colored little fish. The largest 

 specimens known are 2\ inches long. The adult is unknown unless 

 Cirrhites rivulatus should prove to be such. There is no important differ- 

 ence in form or structure, but the coloration of the two is very diftevent, 

 and suggests that the two are distinct species. {(5fjTcx, the letter B ; ovpd, 

 tail.) 



Cirrhites hetarus, Gill, Proc. Ac. Nat. Sci. Phila. 1862, 259, Cape San Lucas (Coll. John 

 Xaulus) ; yoimg, of IJ inches. 



