BLUE CAT. 787 



Silurus ceruletcena, KAriNBsquK (1820), Qaart. Jonrn. Soi. Lit. and Arts, London, 49 (et 

 var. melanurus), 



Pimelodug ceruleecens, Eafinbeque (1820), loh. Ohieneis, 63. — Kirtland (1838), Kept. 

 Zool. Ohio, 169, 194 ; (1846) Boat. Jonrn. Nat. Hist., iv, 332.— Stoker (184S), Sy- 

 nopsis Fishes N. A. in Mem. Nat. Acad. Sci., 405. (All these descriptions refer more 

 or less to Aminrus nigricana.) 



lotalurus coBruleaoens, Gill (1862), Proc. Bost. Soo. Nat. Hist., 43. — Copb (1865), Proo. Aead. 

 Nat. Sci. Phila., 85 ; (1870) Proo. Am. Philos. Soo., 489.— Jordan (1874), Ind. Qeol. 

 Survey, 222.— Gill (1876), loh., Capt. Simpson's Exped., 417. 



lehthalurus cceruleseme, Cope (1869), Jonrn. Acad. Nat. Sci., 237. 



Silurus argeatinus, Rafinesque (1820), Qaart. Jonrn. Soi. Lit. and Arte, London, 50. 



Pimelodus argyrua, Rafinesque (1820), Ichthyologia Ohiensis, 64. 



Pimelodusfuroifer, Cvv. and Val. (1840), xv, 139.—" Hyrtl (1859),Denksohr. Akad. Wias. 

 Wien, 16". — "Knbr, Sitzgsber. Akad. Wiss. Wien, xxvi, 421." 



letalurus furcifer, Gill (1862), Proc. Bost. Soc. Nat. Hist., 43.— Jordan (1876), Manual 

 Vert., 300. 



Pimolodus gracilis, HouGH (1852), Fifth Ann. Rept, Reg, Univ., Condition State Cabinet 

 Nat. Hist., Albany, 26. 



Syneohoglanis gracilis, Gill (1859), Trans, Lyo. Kat. Hist., 3 (reprint). 



Ictalarm gracilis Gill (1862), Proo. Bost, Soo. Nat. Hist., 43.— Cope (1865), Proo. Acad. 

 Nat. Soi , Phila., 85.— Jordan (1876), Man. Vert., 300.— Jordan and Coekland 

 (1876), Check List, 159. 



Pimelopus vulpes, Girard (1858), Proo. Acad. Nat. Sci., Phila,, 170 ; (1859) U. 8. and Mex. 

 Bound. Surv., 33. 



Ictalurui vulpes, Gill (1862), Proo. Bost. Soc. Nat. Hist, 43.— Jordan and Copbland 

 (1876), Check List, 159. 



PimeUdus olivaceus, Girard (1858), Pae. R. E. Survey, x, 211. 



lotalurus olivaceus, Gill (1862), ).. c, 43; (1876) Rept. Ichtby. Capt. Simpson's Exp., 417. 

 —Jordan (1876), Man. Vevt., 300.— Jordan and Copeland (1876), Check List, 159. 



Synechoglanis headlei. Gill (1859), Trans. Lyo. Nat. Hist. N. Y., 2 (reprint). 



lotalurus headlei. Gill (1862), Proc. Bost. Soc. Nat. Hist., 43.— Jordan and Copeland 

 (1876), Check List, 159. 



Pimelodus houghii, Girard (1859), Proc. Acad. Nat. Sci. Phila., 159. 



Pmelodus megalops, GraiRD (1859), 1. d., 161 (said to have the eye very large, its dia- 

 meter one-third the length of the side of the head). 



lotalurus megalops, Jordan and Copeland (1876), Bull. Buff. Soc. Nat. Hist., 159. 



Pimelodus gnmosus, Girard (1859), Proo. Aoad. Nat. Sci. Phila., 161. 



Pimelodus hammonclii, Abbott (1860), Proc. Acad. Nat. Bci. Phila., 568. 



Pimelodus notatus^ Abbott (1869), Proc. Aoad. Nat. Sci. Phila., 569. 



lotalurus aimpso-m, Gill (1862), Proc. Bost. Soc. Nat. Hist., 43; (1876) loh. Capt. Simp- 

 son's Exp., 47. 

 Description,— BoAy slender, little elevated, the dorsal region not mnoh elevated, and 



the profile from snout to dorsal little concave ; head rather small, conical, with small 



mouth ; eye larger, placed medially, the middle of the head falling in front of its pos- 



torioi r/iargin ; skin thin ; pectoral spines long, If in head ; coloration olivaceous, sil- 

 very, the adult bluish, the young yellowish, with darker blotches, made of dark 



points, which disappear with age ; head 4 ; depth 5 in length ; anal base about 4 times 



itt length, of 25 to 29 rays. Length 1 to 2i feet. 



