PCECILIA.— MOLLIENISIA. 105 



Hah. Mexico, Rio San Juan at Monterey, Nuevo Leon i ^. 



Here described from several specimens, measuring up to 50 mm. in total length. 



8. Pcecilia maculata. 



Platypmcilus maculatus, Giintli. Cat. Fish. vi. p. SfiO (183G) ' ; Garman, Mem. Mus. Comp. Zool. 



xix. 1895, p. 48'' ; Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 686"; Meek, Publ. 



Columbian Mus., Zool. v. 1904, p. 145, t. 9 '. 

 Platypacilus variatus, Meek, t. c. p. 146, t. 10". 



Depth of body 2 to 2| in the length, length of head 3^ to 3f . Snout 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 0-11 ; 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 ( J ). 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. 



HaJ). 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 np 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 generican}^ distinct from Pcecilia. 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. 348 (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 \ 

 Pcecilia multilineata, Le Sueur, t. e. p. 4, t. 1 \ 



Puecilia lineolata, Girard, U.S. Mex. Bound. Surv., Fishes, p. 70, t. 35. figs. 9-11 (1859)''. 

 Linda pcecilioides, Girard, t. c. p. 70, t. 38. figs. 8-11 '. 

 Limia formosa, Girard, Proc. Ac. Philad. 1859, p. 115". 

 Limia matamorensis, Girard, t. c. p. 116'°. 

 Mollienisia formosa, Giinth. t. c. p. 349"; Jord. & Everm. 1. c"; Meek, 1. c". 



Depth of body 2| to 3 in the length, length of head 3i 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. Each 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 



