Jordan and Everina?in. — Fishes of North America. 215 



Grande ; abundant. (iTv/nKoTToc, bishop or pope, a remote allusion to Cap- 

 tain, afterwards General, John Poi^e, in charge of the party by which the 

 species was collected.) 



Dimida ephcopa, GiRARD, Proc. Ac. Nat. Sci. Phila., 1850, 177, headwaters of Pecos River, 



and Comanche Spring, tributary to Rio Grande. (Typo, No. 45. Cull. Capt. Pope.) 

 Diomla texeiisis, GiR.\Rii, Proc. Ac. Nat. Sci. Phila., 185B, 177, Nueces River, Texas. (Type, 



No. 44. Coll. Clark.) 

 y Dioutla ar(ienlosa\ Girahp, Proc. Ac. Nat. Sci. Pliila., 1S5G, 178, San Felipe Creek and Devil 



River, tributaries of the Rio Grande, in Texas. (Type, No. 32. Coll. Clark.) 

 Uijbo(i)ial)ius flaripiiiiiis, Coi'K, Bull. U. S. Nat. Mus., xvii, 36, 1880, Johnson's Fork of Llano 



River, in Kimble County, Texas; Jordan & Gilbert, Synopsi?, 156, 1883. 

 1 HiihogiiaHiiis {Dioiiila) pniicH/er^, Garman, Bull. Mus. Conip. Zoiil., viii, 89, 1881, Parras, and 



spring near Saltillo, Coahuila, Mexico; Jordan & Gilbert, Synopsis, 884, 1883. 

 Hi/hmjiitilJius cirilis^, Coi'E, Trans. Aiuer. Philo. Soc, 1884, 1G7, Monterey, New Leon. 

 KyhognuOiiis ep'tHCopHs, Jordan & Gilbert, Synopsis, loC, 1883. 

 Dionda pumtifer and episcopa, Evermann & Kendall, Bull U. S. Fish Comm., xii, 1892, 99. 



345. HTB0GN.4THUS NUBILA (Forbes). 



Head 4^; depth 4; eye 3. D. 8; A. 9 ; scales 5-37-3; teeth 4-4, little 

 hooked. Head narrow ; mouth inferior and horizontal. Lateral line 

 anteriorly deflexed. Eye large, rather longer than muzzle. 14 scales 

 before dorsal. Color very dark; a dark lateral band from muzzle to base 

 of caudal; fins all plain. Length 2i inches. Western Hlinois, west to 

 Wyoming, and southwest to the Ozark region, abundant. Close to H. 

 ephcojxx, but differing in the more pointed snout and larger mouth, the 

 cleft 4 in.head, not 5 as in H. episcopa. (nubilus, dusky.) 



Alhjimnjis wthihin, Forbes, Bull. III. Lab. Nat. Hist., it, 56, 1878, Rock River, Ogle County, 



Illinois. (Type, No. 28410. Coll. Forbes.) 

 Cliola nnbila, Jordan & Gilbert, Synopsis, 167, 1883. 



346. HYBOGNATHUS AMARA (Girard). 



Head4; depth4; eye3i. DorsalS; A. 7; lateral line 35 to 38; teeth 4-4. 

 Body elliptical, rather chubby. Head short and blunt; front convex. 

 Suborbital bones rather narrow. Eye moderate, about as long as snout. 

 Scales moderate, 16 in front of the dorsal. Silvery ; no dark lateral band, 

 nor caudal spot. Rio Grande. Possibly the young of IT. nuchalis or some 

 similar species; perhaps identical with H, aryentosa. {amarus, bitter, the 

 type being found in brackish water. ) 



Algoma amara, Girard, Proc. Ac. Nat. Sci. Phila., 1856, 180, Lagoon near Fort Brown, 



Texas. (Type, No. 149. Coll. Clark.) 

 Algoma fluviatiUf, GiRARD, Proc. Ac. Nat. Sci. Phila., 1856, 181, near Monterey, New Leon; 



GiRAun, U. S. & Mex. Bound. Surv., Zoiil., 45, pi. xxvii, figs. 17-20, 185',i. (Coll. Conch.) 

 Hi/biMjnalhnsJfm-ialiU.'!, Jordan & Gilbert, Synopsis, 157. In Girard's figure, jhirHtlilis has snmller 



scales than amara, about 40 in lateral line, but the plates of the Mexican Boundary Survey 



are very untrustworthy. 

 Htjbogiiathus amanis, Jordan & Gilbert, Synopsis, 156, 1883. 



'One of the types of D. argenlom, recently examined, gives: Head 3|; depth S^/J; eye 873, 

 and is heavier and stouter than typical episcopa ; the dorsal is less anterior. Possibly a distinct 

 species. 



'■'Hiihognalhvspunctifer, Garman, from Laguna del Muerte, Coahuila is not evidently different. 

 Scales 5-40-3. Head 4; depth 4; the form stouter than in H. episcopa. 



^ Hyhogiiolhus cii-ilk, Cope, from Monterey, New Leon, is also not appreciably different. 

 Lateral stripe faint or obsolete; depth of body e<iual to length of head, 5ki in total with caudal; 

 cye3;.j in head; pectorals not reaching ventials. 



All these last (aiyentosa, punctifer, rii-ilis) may lielong to a distinct species, {Uiil'igiiathus argeit- 

 tosa), allied to H. episcnpa, but stouter, with smaller eye, aud the lateral baud faint or obsolete, 

 the ' 'sides silvery as if painted with iiuicksilver." 



