102 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY—II. 
28. NOTURUS LEPTACANTHOUS, Jordan. 
Weak-spined Stone Cat. 
(Figs. 64 and 65.) 
Noturus leptacanthus, JORDAN (1876), MSS.—Jorpan & COPELAND, Check List, 160 
(name only).—JORDAN (1877), Ann. Lyc. Nat. Hist. —. 
Habitat —Etowah River, Georgia. 
But a single specimen of this species is known; it is, however, totally 
distinct from all the rest; its relations are chiefly with gyrinus. 
29. NOTURUS GYRINUS, (Mitchill) Rafinesque. 
Tadpole Stone Cat. 
(Fig. 66 and 67.) 
Silurus gyrinus, MITcHILL (1818), Am. Monthly Mag. March, 322.—Dr Kay (1842), 
Fishes N. Y. 186. 
Noturus gyrinus, Rar. (1819), Journ. de Physique, 421; (1820), Ich. Oh. 68. —Grinb 
(1862), Proc. Bost. Soc. Nat. Hist. 45.—Corer (1869), Journ. Acad. Nat. Sci. 
Phila. 237.—JORDAN (1876), Man. Vert. 303.—JORDAN & COPELAND (1876), 
Check List, 160.—JORDAN (1877), Aun. Lye. Nat. Hist. —. 
Schilbeodes gyrinus, BLEEKER (1858), 1. ¢. 
Habitat.—Southern New York to Pennsylvania. 
I have examined specimens of this species from Orange, Rockland, 
and Chemung Counties, New York. It resembles the next, but is in 
every way slenderer and weaker. 
30. NOTURUS SIALIS, Jordan, sp. nov. 
Chubby Stone Cat. 
(Figs. 68 and 69.) 
Noturus flavue, JORDAN (1876), Man. Vert. 303 (in part).—NeELson (1876), Bull. Ills. 
Mus. Nat. Hist. 50.—JORDAN (1877), Proc. Acad. Nat. Sci. Phila. 46. 
Habitat.—Entire Mississippi Valley, Great Lake Region, and in Red 
River of the North. 
Comparison of eastern and western specimens referred to gyrinus show 
surprising differences of form, and as these differences appear to be con- 
stant in a great number of specimens examined from widely separated 
localities, I have decided to separate the western form as a distinct 
species. 
The eastern form, or gyrinus, has the head shorter and every way 
smaller, and the body proper more elongate, more compressed, almost 
ribbon-shaped, and the spines rather weaker. The coloration is the - 
