2G6 PROCEEDINGS OF THE ACADEMY OP 



bulars in one row, with fonr canines. Two rows of premaxillaries, 

 tlie posterior wanting medially. In R. myey^sii the middle row of 

 teeth is so curved as to be continuous with the posterior series. 



Scapular and caudal spots indistinct ; general color pink. Top 

 of head, maxillary bone, and opercula crimson ; fins immaculate. 

 Total length .135 m. ; length to anal .059 ; to adipose dorsal .098; 

 to first dorsal .057. This is a larger fish with a smaller head 

 than the R. myersii. It may possibly prove to be the R. affinis, 

 Giinth., Pr. Z. S., Lond., 1868, 246, but he describes " anal rays 

 55, scales 1. 1. 80," and the dorsal fin appears to be more jDOsterior. 



ANACYRTUS SANGUINEUS, Cope, sp. nov. 



A stout species with large scales. Sc. 12-54-12 ; radii, D. 9 ; 

 A. 43; Y. 8, reaching anal ; P. 16, to middle of ventrals. Back 

 much elevated, dorsal commencing in front of anal (A. i. op- 

 posite D. 4), and nearer end of muzzle than basis of caudal by a 

 little. Caudal deeply forked. Depth 2.6 times in length (caudal), 

 and length of head 3.4 times in the same. Ej^e four times in 

 length of head in adults, equal interorbital width. Operculum 

 and orbital bones rugose. 



Premaxillary teeth in two very distinct series, a canine at the 

 inner, and one at the outer extremity of the bone. Maxillary 

 toothed to the end, which is behind the line of the posterior 

 margin of the orbit. Mandibular teeth with two (or three on one 

 side of one) canines on each side. 



Color pale, with a large black spot on the line from the front of 

 the dorsal fin ; a large black spot at base of caudal fin, from 

 which a faint line extends towards the former spot. Sides of 

 head with purple reflections. Dorsal, adipose, candal, and anal 

 fins vermilion, the anal with a black border. Total length .133 m. ; 

 to basis dorsal .0626 ; to basis ventral .045 ; to adipose .10 ; to 

 basis caudal fin .115. 



This brilliantly colored fish is nearest the A. tectifer, Cope 

 (Proc. Am. Philos. Soc, 1870, 565), and A. ];)auci7^adiatus^ Gthr. 

 (Catal. B. M. v. 346). It is less elongate than the former, and 

 has a more concave profile; the anal rays are more numerous. 

 From the latter species it is well distinguished by its well-defined 

 exterior premaxillary series of eight teeth, and the more anterior 

 position of the dorsal fin. 



Numerous specimens from the Ambyiacu. 



[January 16, 



