Jordan and Evermann. — Fishes of North America. 1099 



second dorsal and anal conspicuously cross-barred ; head blackish, with 

 darker stripes radiating from eye ; males further marked with conspicu- 

 ous dark cross bars. Minnesota to northern Indiana and northern Mis- 

 souri, in cold weedy streams, (liveolatus, with small lines.) 

 Cidonolus Uneolalm, AoASsiz, Amer. Journ. Sci. and Arts, 1854, 3u5, small creeks near Quincy, 



Illinois. 

 Etheostmna lineolalvm, Jordan & Gilbert, Synopsis, 513, 1883. 

 Catonolus lineulalum, Vaillant, Recherches, 118, 1873. 



476. ALVARIUS, Girard. 



i4Zran'!(S,«GlEARD, Proc. Ac. Nat. Sci. Phila., 1859, 101, {lateralis). 



This genus is based on a single species, which has not been recognized 

 since it was originally described. It is apparently closely allied to 

 Etheostoma, differing in the small number of its fin rays, in which regard 

 it approaches Microperca. Tlie species is imperfectly described and its 

 affinities cau only be guessed at, (A coined name without meaning.) 



1491. ALVARIUS LATERALIS, Girard. 



'' A representative of the Etheostomoid family was procured by the 

 United States and Mexican Boundary Commission at the mouth of tiie 

 Rio Grande del Norte (Rio Bravo). It constitutes a new generic pety 

 allied to Catonotits, and to which we have applied the name of Alvarius, 

 with the following characters: Head elongated and tapering. Mouth 

 terminal, large, not protractile ; lower jaw longer than the upper. Teeth 

 very minute. Opercular apparatiis, cheeks, and throat scaly. First dorsal 

 nearly equal in height to the second, from which it is quite distinct. 

 Anal fin much smaller than the second dorsal ; caudal fin truncated ; 5 

 soft rays to the ventrals. Ventral scales uniform." Body slender, elon- 

 gate. Head subconical and tapering forward. Eye equal to snout, 4 in 

 head. Maxillary reaching pupil. First dorsal about equal to second and 

 separated from it. Anal smaller than second dorsal, the last rays of the 

 2 fins opposite each other. Scales very small. Lateral line median. 

 Brownish, back spotted; sides with a narrow blackish streak, which 

 extends around the snout ; first dorsal with a black spot on its upper pos- 

 terior edge; caudal transversely barred. D. VI, 10; A. 8. Length If 

 inches. Rio Grande. (Girard.) The types are now lost and the species 

 has not been rediscovered, (lateralis, pertaining to the side.) 



Ah-ariiis lateriilis, Girard, Proc. Ac. Nat. Sci. Phila., 1859, 101, mouth of Rio Grande, (Coll. 



Hex. Bound. Surv.); Vaillant, Recherches, 141, 1873. 

 Pcpcilichthys lateralis Jordan & Gilbert, Synopsis, 522, 1883. 

 Etheostoma laterale, Boulenger, Cat., i, 87. 



477. PSYCHROMASTER, Jordan & Evermann, new genus, (tuscumhia). 



This genus is allied to Etheostoma, from which it differs in its robust 

 form, its single anal spine, and especially in the squamation of the head, 

 which is scaled to the snout. One species. ()/)v;i:f;o<,", coldwater ; /taarl/p, 

 searcher. ) 



