CVrRINOBONT FISHES. 1011 



$ . Depth of body 2| to 3 in the length, length of head 4. 

 Diameter of eye 4 in length of head, interoi-bital width 1|. 28 

 to 30 scales in a longitudinal series. Dorsal 15-16 ; base about 

 as long as its distance fx-om end of snout, longer than its distance 

 from caudal iin ; longest rays | or | length of head. Anal 9-10 ; 

 origin below middle of dorsal. Pectoral as long as head ; pelvics 

 reaching origin of anal. Caudal rounded or subtruncate. Least 

 depth of caudal peduncle nearly equal to length of head. A 

 small spot on each scale, most conspicuous posteriorly; dorsal 

 and caudal with series of small spots. 



c3" . Base of dorsal 1| to 1|^ its distance from end of snout and 

 about twice its distance from caudal ; longest rays longer than 

 head. Anal below anterior part of dorsal ; produced rays ^ length 

 of head ; second pelvic ray about as long. Lower angle of caudal 

 slightly produced. Spots on lower part of dorsal forming undu- 

 lating stripes ; a series of large spots, one on each interradial 

 membrane, along middle of fin. Lower margin of caudal blackish. 



Lake Peten in Guatemala. 



Three females, 100 to 110 mm., and three males, 100 to 130 mm. 

 in total length, types of the species. 



2. MOLLIENISIA LATIPINNA. 



Le Sueur, Journ. Acad. Philad. ii. 1821, p. 3, pi. iii. ; Cuv. & 

 Val. Hist. Nat. Poiss. xviii. p. 139, pi. 527; Gimth. Cat. Fish. vi. 

 p. 348 (1866) ; Garman, Mem. Mus. Comp. Zool. xix. 1895, p. 50, 

 pi. xii. ; Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 699. 



Pcecilia midtilineata Le Sueur, t. c. p. 4. 



Poecilia lineolata Girard, U.S. Mex. Bound. Surv., Fish. p. 70, 

 pi. XXXV. ligs. 9-11 (1859). 



Limia jyoscilioides Girard, t. c. p. 70, pi. xxxviii. figs. 8-11; 

 Proc. Acad. Philad. 1859, p. 115. 



Limia matamorensis Girard, Proc. Acad. Philad. 1859, p. 116. 

 5 . Depth of body 2| to 3 in the length, length of head 3^ to 4. 

 Diameter of eye 3-^ to 4 in length of head, interorbital width 1|- 

 to 2. 26 to 28 scales in a longitudinal series. Dorsal 14-16 ; in 

 adults base somewhat shorter than its distance from end of snout, 

 longer than its distance from caudal ; rays ^ length of head. 

 Anal 9-10 ; origin below middle of dorsal. Pectoral a little 

 shorter than head ; pelvics reaching vent or origin of annl. 

 Caudal rounded. Least depth of caudal peduncle about | length 

 of head. Spots on scales forming longitudinal stripes ; dorsal 

 and basal part of caudal with seiies of small spots. 



c? . Dorsal base, in adult, about 1 4 its distance from end of 

 snout or twice its distance from caudal ; rays longer than head. 

 Anal below anterior part of dorsal ; produced rays | length of 

 head, a little longer than second pelvic ray ; caudal rounded. 

 Spots on lower part of dorsal forming longitudinal stripes ; a 

 series of large spots, one on each inteiTadinl membi-ane, along 

 middle of fin ; caudal spotted superiorly; with blackish low er 

 edi>'e. 



