182 



Field Columbian Museum — Zoology, Vol. V. 



in head; interorbital width equaling postorbital part of head, 2-| in 

 length of head; lower jaw somewhat shorter than upper; maxillary 

 extending to vertical from anterior margin of eye; origin of spinous 

 dorsal above that of anal ; anterior rays of soft dorsal and anal pro- 

 duced, longest anal rays equaling depth of body; pectorals falcate, 

 as long as head; origin of ventrals midway between posterior oper- 

 cular margin and first anal ray; caudal emarginate. 



A sharply defined silvery lateral band as broad as a scale. One 

 specimen 75 mm. in total length from Mexico (Regan). 



It is quite probable that this species is a resident of salt water. 



172. Menidia lisa sp. nov. Lisa. 



Type, No. 4633, F. C. M., 2.1 inches in length; Refugio, Vera 

 Cruz. 



Basin of the Rio Papaloapam. (Refugio; El Hule.) 



Fig. 63. Menidia lisa Meek. 



Head iyi to 4; depth 4^ to 5 ; D. iv or v-i, 8 or 9 ; A. 1, 19 to 21 ; 

 scales about 42. Body elongate, compressed, belly rounded; snout 

 pointed, margin of upper lip on level with upper edge of pupil; mouth 

 moderate, very oblique; premaxillary curved, very protractile; teeth 

 in two series in each jaw, the outer series the larger; snout very short, 

 3>2 in head; the maxillary reaching about vertical below pupil; 

 eye large, 2^ in head; origin of dorsal fin midway between base of 

 caudal and anterior margin of eye, over or slightly behind origin of 

 anal; base of anal longer than head, $\ in body; pectoral high, its 

 length 1^3 in head; ventrals 2 in head; scales thin, deciduous, cycloid 

 (oh all specimens in our collection there are scales on posterior half of 

 bodv, on belly, and a band on dorsal region; as the specimens are all 

 scaled alike it is probable a larger part of the anterior part of the body 

 is naked); caudal fin forked; caudal peduncle slender; gill rakers 

 slender, 15 on first gill arch; vertebras 17+22=39. 



Color light silvery; a narrow dark lateral stripe; spinous dorsal 

 profusely covered with black dots; iris silvery. Length about 2% 

 inches. 



