Jordan and ILvermann. Pishes of North America. 663 



974. RIVULUS MARMORATUS, Poey. 



Differs from Rivulus cylindraceus in having the dorsal farther back, the 

 distance of its insertion from the tip of caudal being equal to its distance 

 from edge of opercle ; the anal appearing more advanced. Body dashed 

 with light and dark spots; a black caudal* ocellus. Cuba. (Poey.) 

 (marmorattis, marbled.) 

 RU'ulus inai-morat'us, POEY, Auales de Hist. Nat. Espana, ix, 248, 1880, Cuba. 



303. LUCANIA, Girard. 



Lucania, GIRARD, Proc. Ac. Nat. Sci. Phila., 1859, 118, (venusta); not Lucanus, a genus of beetles. 



Body oblong, compressed; lower jaw prominent, the cleft of the mouth 

 short and very oblique. Mouth moderate, the snout not produced ; each 

 jaw with a single series of conical teeth. Scales very large. Gill open- 

 ings not restricted. Dorsal and anal rays in moderate number, the dorsal 

 above or slightly in advance of the anal ; anal fin not modified in the 

 males ; oviparous. Very small fishes of the coastwise swamps of the 

 United States, all of them very prettily colored. (A coined name, with- 

 out meaning.) 



n. Body comparatively elongate, the depth 4% to 5 in length, the form approaching that of 

 Bfndw. 



b. Body without black longitudinal band in either sex, the female with a caudal ocellus 



as in Eivulus; an ocellus above front of anal; cleft of mouth very short and nearly 



vertical; dorsal rays 7; anal 8; depth 5 in length. OMMATA, 975. 



lb. Body in both sexes with a black longitudinal band from eye to the black caudal spot; 



male with the basal half of dorsal and anal black, the fins with red in life. Depth 



4% in length. D. 9; A. 9; scales 30-7. GOODEI, 97G. 



aa. Body comparatively short and deep, the depth 3% to 3% in length, the form approaching 



that of Cyprinodon; body in both sexes without black longitudinal band or black ocelli; 



the fins in male with orange, the dorsal in male with a large black spot at base in 



front. 



c. Body more oblong, the depth 3% to 3% in length. D. 11 or 12; A. 9 or 10; scales 26-8. 



VENUSTA, 977. 



cc. Body deep, the depth 3% in length. D. 10; A. 10; scales 26-8. PARVA, 978. 



975. LUCANIA OMMATA (Jordan). 



Head 3J ; depth 5 ; eye 2|. D. 6 or 7 ; A. 9 or 10 ; scales 26 to 28-9. 

 Body fusiform, slender, somewhat compressed. Premaxillary very pro- 

 tractile ; teeth small, pointed, in one row, the tips not colored. Mouth 

 very small, its cleft almost vertical ; ventral surface of lower jaw directed 

 forward so that the fish seems truncated. Eye large, twice length of 

 snout, equal to the flat interorbital space. Gill membranes narrowly 

 connected, free from isthmus. Scales large. Anal inserted slightly in 

 advance of dorsal, not modified in the male; insertion of dorsal mid- 

 way between edge of opercle and base of caudal ; pectorals and veutrals 

 small. Intestine not longer than body. Straw color, a dark vertebral line ; 

 male with 5 or 6 dark bars and no caudal ocellus; female with a jet-black 

 spot as large as pupil on side just in front of origin of anal ; a larger ocel- 

 lated spot at upper part of base of caudalj a dark band of minute points 



* Misprinted "pectoral" in Poey 's description. 



