PCECILIA.—MOLLIENISIA. 105 
Hab. Mexico, Rio San Juan at Monterey, Nuevo Leon! 4, 
Here described from several specimens, measuring up to 50 mm. in total length. 
8. Pecilia maculata. 
Platypecilus maculatus, Giinth. Cat. Fish. vi. p. 350 (1866); Garman, Mem. Mus. Comp. Zool. 
xix. 1895, p.48°; Jord. & Everm. Bull. U.S. Nat. Mus. xivii. 1896, p. 686°; Meek, Publ. 
Columbian Mus., Zool. v. 1904, p. 145, t. 9°. 
Platypecilus variatus, Meek, t. c. p. 146, t. 10’. 
Depth of body 2 to 22 in the length, length of head 34 to 33. Smnout shorter than eye, the diameter of 
which is 3 in the length of head. Interorbital width equal to the distance from middle of eye to free 
edge of operculum. 23 to 26 scales in a longitudinal series. Dorsal 9-11; origin equidistant from 
snout and anterior part of caudal; free edge of the fin somewhat convex. Anal 8-9, pointed, opposite 
the posterior half of the dorsal (2). Pectoral a little shorter than the head. Caudal rounded. Least 
depth of caudal peduncle from ? to as long as the head. Olivaceous, sometimes with black blotches ; 
often a dark spot or crescent or a pair of spots at the base of the caudal. 
Hab. Atlantic Coast Streams of Mexico: 
Rio Soto la Marina (Garza Valdez, Santa Engracia, Victoria)®; Rio Panuco 
(Forlon, Rascon, Valles) ®; Rio Papaloapam (El Hule, Obispo, Perez) *. 
Here described from eight specimens, measuring up to 60 mm. in total length, 
including the types of the species. 
14. MOLLIENISIA, Le Sueur, 1821. 
Mollienisia, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 698. 
Scarcely generically distinct from Pwcilia. Dorsal fin longer, of 12 to 16 rays, in adult males not only 
higher but considerably longer than in females. 
Hab. Carolina to Guatemala. 
1. Mollienisia latipinna. 
Mollienisia latipinna, Le Sueur, Journ. Ac. Philad. ii. 1821, p. 3, t.3°; Giinth. Cat. Fish. vi. 
p. 848 (1866) >; Garm. Mem. Mus. Comp. Zool. xix. 1895, p. 50, t. 12°; Jord. & Everm. 
Bull. U.S. Nat. Mus. xlvii. 1896, p. 699*; Meek, Publ. Columbian Mus., Zool. v. 1904, 
p- 155°. 
Pecilia multilineata, Le Sueur, t. c. p. 4, t. 1°. 
Pecilia lineolata, Girard, U.S. Mex. Bound. Surv., Fishes, p. 70, t. 35. figs. 9-11 (1859) ”. 
Limia pecilioides, Girard, t. c. p. 70, t. 38. figs. 8-11°. 
Limia formosa, Girard, Proc. Ac. Philad. 1859, p. 115". 
Limia matamorensis, Girard, t. e. p. 116". 
Mollienisia formosa, Giinth. t. c. p. 849"; Jord. & Everm. 1.jc.’; Meek, |. ¢.". 
Depth of body 23 to 3 in the length, length of head 33 to 4. 26 to 28 scales in a longitudinal series. 
Dorsal 13-16, in adult males very elevated and occupying the greater part of the length of the back. 
Anal 9-10. Caudal rounded in both sexes. ach scale on the side of the body with a dark spot, which 
may form continuous longitudinal stripes ; dorsal, in the female, with series of small dark spots, in the 
male with an oblong or oval spot on each interradial membrane, forming a series along the middle of 
BIOL. CENTR.-AMER., Pisces, July 1907. P 
