%6 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY—II. 
2. ICHTHH LURUS ROBUSTUS, Jordan, sp. nov. 
Robust Channel Cat. 
(Figs. 3 and 4.) 
Ictalurus furcatus, NELSON (1876), Bull. Ils. Mus. Nat. Hist. 50. 
Habitat.—Ohio and Mississippi Rivers. 
This is a large robust species said to be not uncommon in the Ohio 
and Mississippi Rivers, and which seems to have been thus far con- 
founded with the related I. fureatus. From that species it differs obvi- 
ously in the shorter anal fin, which has 27 to 30 rays, and forms but 
one-fourth of the length of the body, without the caudal. It is also a 
stouter fish, with a larger head and a more elevated dorsal region. 
From J. punctatus this species differs notably by the anterior position 
of the eyes and by the greater elevation of the dorsal region. Old speci- 
mens have the profile somewhat concave as in I. furcatus. 
The type is a large specimen, about 18 inches long, numbered 20056 
in the National Museum. The record of the locality is lost. Another 
specimen, figured in this paper, was sent me by Prof. 8S. A. Forbes, 
from the Ohio River at Cairo. Professor Forbes thinks it common in 
the Lower Ohio and Mississippi, but that it rarely ascends the Ilinois 
and other tributary rivers. 
3. ICHTHASLURUS PUNCTATOUS, (Raf.) Jordan. 
Blue Cat—White Cat—Silver Cat—Channel Cat. 
(Figs. 5 and 6.) 
Silurus punctatus, RaF. (1818), Amer. Monthly Mag. and Critical Review, Sept. 359. 
Ictalurus punctatus, JORDAN (1876), Bull. Buff. Soc. Nat. Hist. 95; (1876), Manual 
of Vertebrates, 300.—JoRDAN & COPELAND (1876), Check List in Bull. Buff. 
Soc. Nat. Hist. 159.—JoRrDAN (1877), Annals Lye. Nat. Hist. N. Y. —. —NELSON 
(1876), Bull. Ils. Mus. Nat. Hist. 50. 
Pimelodus caudafurcatus, Le SuEuUR (1819), Mémoires du Muséum, v, 152. 
Amiurus caudafurcatus, GUNTHER (1864), Catalogue of Fishes, v, 102. 
Silurus maculatus, Rar. (1820), Quarterly Journal of Science, Literature, and Arts, 
London, 48 (et var. erythroptera, p. 49). 
Pimelodus (Ictalurus) maculatus, Rar. (1820), Ichthyologia Ohiensis, 62. 
Silurus pallidus, Rar. (1820), Quart. Journ. Sci. Lit. Arts London, 49 (et var. margi- 
natus, lateralis, leucoptera). 
Pimelodus pallidus, Rav. (1820), Ich. Oh. 63.—KirTLAND (1838), Report Zool. Ohio, 
169, 194. : 
Silurus cerulescens, Rar. (1820), Quart. Journ. Sci. Lit. Arts London, 49 (et var. melan- 
urus). 
Pimelodus cerulescens, Ra¥. (1820), Ich. Ohiensis, 63.—KiIRTLAND (1838), Rept. 
Zool. Ohio, 169, 194; (1846), Bost. Journ. Nat. Hist. iv, 332.—Srorer (1846), 
Synopsis Fishes N. At in Mem. Nat. Acad. Sci. 405. (All these descriptions re- 
fer more or less to Amiurus nigricans). — 
