256 Mr. 0. T. Regan on new or little-known 



its origin midway between nostril and base of caudal. 

 A. 1G— 17, commencing a little behind the end of dorsal. 

 Pectoral less than ^ the length of head. Scales deciduous. 

 A well-defined silvery lateral band as broad as the eye. 



Total length 75 mm. 



Three specimens from Las Pefias, Jalisco, Mexico, collected 

 by Dr. Buller. 



Allied to E. perfasciatus, Poey, but with longer head, 

 smaller eye, and shorter pectoral. 



Pseudoxiphoplwrus pauciradiatus, sp. n. 



Xiphophorus bimaculatus (part.), Ileck. Sitzb. Ak. Wien, 1848, p. 297, 



pi. ix. fig. 2. 

 Pseudoxiphoj)horus bimaculatus (part.), AVoolm. Bull. U.S. Fish. Comm. 



xiv. 1894, p. 65; Jord. & Everm. Fish. N. Am. p. 678 (1896). 



Depth of body 3^-4 times in the total length, length of 

 head 3f-4£ times. Snout not longer than eye, the diameter 

 of which is 3^-4 times in the length of head, and 2-2^ times 

 in the interorbital width. 29-30 scales in a longitudinal 

 series. D. 11-13, its origin nearer to base of caudal than to 

 tip of snout, the length of its base about 4 times in the total 

 length. A. 9-10, commencing in advance of the dorsal in 

 the male, and slightly behind the dorsal in the female. 

 Pectoral §— § the length of head. Brownish, each scale with 

 a darker intramarginal crescent; a black spot on the shoulder 

 and another on the upper part of the base of caudal ; dorsal 

 with 2 series of small blackish spots. 



Total length 76 mm. 



Eight specimens from Orizaba, Mexico, collected by Mr. A. 

 J. Wool man. 



Two species have been confounded under the name of 

 P. bimaculatus, and it seems probable that the specimens 

 described and figured by Heller as females belong to the one 

 described above. P. bimaculatus (of which P. reticulatus, 

 Trosch., is a synonym) must be restricted to the species of 

 which Heckel described and figured a male specimen and 

 which has been redescribed by Steindachner. It differs 

 from P. pauciradiatus in having a longer head and longer 

 snout, and in the dorsal fin with 14-16 rays commencing 

 midway between tip of snout and base of caudal, its base about 

 % of the total length. 



Zoogoneticus maculatus, sp. n. 



Depth of body 3£-3f times in the total length, length of 

 head 3 times. Snout as long as eye, the diameter of which 



