786 FISHES — SILURID^. 



Diagnosis. — This is the only Cat-fish in Ohio having more than thirty 

 rays in the anal fin. 



Habits. — I have seen one or two specimens taken at Cincinnati. Noth- 

 ing distinctive is known of its habits, which are probably identical 

 with those of its cogener, J. punctatus. 



13. IcHTH^LURUs KOBUSTUs Jordan. 



Ghuckle-Iieaded Cat. 



IcMhaslurus rohustm, Jobdan (1876), Bull. U. S. Nat. Mns., x, 76 ; Man. Vert., Ed. 2d, 

 1878, 328. 



Description. — Body rather stout and deep, compressed behind ; the back elevated ; head 

 rather large, one- third longer than broad ; the eye moderate, wholly in front of the mid- 

 dle of the head ; slope from snout to base of dorsal more or less concave, the dorsal re- 

 gion being elevated ; skin thick ; coloration pale, little silvery ; anal fin moderate, its 

 base 3-J to 4 in length ; its rays 27 to 30 ; head ii in length ; depth about 4 ; pectoral 

 spine little more than half the length of head ; length 1 to 2 feet. 



Habitat, Ohio Valley, Mississippi Valley, not very common. 



Diagnosis. — From I. punctatus this species may be known by the smaller 

 and more anterior eye, which is in front of the middle of the head ; 

 from I. furcatus it is separated by the shorter anal fin. 



Habits. — The few specimens known of this species are from the lower 

 Ohio, Illinois, and Mississippi Rivers. Nothing distinctive is known of 

 its habits in life. 



14. IcHTH^LURUS PUNCTATUS Jordan. 



Blue Cat; ll^hite Cat; Silver Cat; Channel Cat. 



Silurus punctatus, Eafinebque (1818), Amer. Monthly Mag. and Critical Review, Sep- 

 tember, 359. 



lotalwus punctatus, Jordan (1876), Bull. Buff. Soo. Nat. Hist., 95; Manual of Ver- 

 tebrates, 300. — JoKDAN and Copeland (1876), Check List, Bull. Buff. Soo. Nat. 

 Hist., 159.— Jokdajs (1877), Annals Lyo. Nat. Hist. N. Y.,— . — Nelson (1876), Bull. 

 Ills. Mns. Nat. Hist., 50. 



lohthcslurus punctatus, Jordan (1878), Bnll.U. S. Nat. Mns., x, 76; Man. Vert., Ed. 

 2d, 328. 



Pimelodus caudafureatus, LeSubur (1819), Memoires dn Mnseum, v, 152. 



Amiunis caudafureatus, Gtjnthbr (1864), Catalogue of Fishes, v, 102. 



Silurus maculatus, Eafinesquk (1820), Quarterly Journal of Science, Literature, and 

 Arts, London, 48 (et var. erythroptera, p. 49). 



Pimelodm (Ictalurus) maculatus, Eafinksqub (1820), lohthyologia Ohiensis, 62. 



Silurus pallidus, Eafinbsque (1820), Quart. Jonrn. Sol. Lit. and Arts, London, 49 (et var. 

 marginatua, lateralis, leucopiera). 



Pimelodus pallidus, Eafinesquk (1820), loh. Oh., 63.— Kirtlakd (1838), Eepoit Zool. 

 Ohio, 169, 194. 



