107. COTTID^ UEANIDEA. 
697 
Note. — As here midcrstood, a wide-spread and abundant species, varying in dil- 
fercnt regions, as is tlie case with most nou-inigratory s]i^cios. Tn this as in others 
of similar range, the inhabitants of each stream may show local peculiarities. A 
number of these forms have received from Dr. Girard specillc names, which are 
accompanied by detailed descriptions. Large collections of these lishes show that 
numerous similar “species” .still exist unde.scribed, as it is a rare thing to find a speci- 
men which exactly agrees in all respects with any of the species in Dr. Girard’s 
“Monograph of tbe Fresh-Water Cottoids.” The following forms, of all of which the 
writers have specimens, may possibly be recognized as “varieties,” but of iheir com- 
plete iutergradatiou we have no doubt : 
Var. richardsoni (Ag.) is rather slender, with the vent rather more posterior than 
usual, placed midway between the snout and the tip of the caudal; in the others it is 
nearly midway between the snout and the middle of the caudal. Wisconsin to Lake 
Superior. 
{Coitus richardsoni Agassiz, Lake Superior, 1850, 300: Coitus r'lchardsoni Girard, 
Monograph Fresh-Water Cottoids N. A. 39: Coitus richardsoni Gunther, ii, 158 ) 
Var. bairdi (Girard) is small and slender, with the spinous dorsal very low, and the 
palatine teeth less developed than in the other forms. Cayuga Lake, N. Y., to Ohio. 
{Coitus bairdii Girard, Proc. Amer. Assoc. Adv. Sci. ii, 1850, 410, and Mon. Cott. 44.) 
Var. zvilsoni (Grd.) is rather stouter, with stronger palatine teeth, and with some of 
the uijpermost of the pectoral rays bifurcate, these being entire in the others. Ohio 
Valley, Pennsylvania, and Indiana. 
{Coitus icilsoni Grd. 1. c. 4:1.) 
Var. alvordi Grd. is short and chubby, with the first dorsal rather high, and joined 
by membrane to the second more than in other forms. Common in Wisconsin and 
Michigan. 
{Cottas alvordi Grd. 1. c. 46.) 
Var. ??icridiOHaZi8 (Grd.) is rather robinst, with the dorsal fins scarcely connected, 
and the mouth rather larger, the maxillary extending to opposite posterior border of 
eye; the preopercular .s))ine is sharp and directed well ui)wmrd. Penn.sylvauia to 
North Candiua, along the Alleghanies; abundant. 
{Cottas meridionalis Girard, Proc. Amer. Assoc. Adv. Sci. ii, 1850, 410, and 1. c. 47.) 
Var. zophera (.Jor. ) is slender and very dark in color, and more conspicuously varie- 
gated ; the first dorsal high; the palatine teeth well developed. Alabama River. 
{Fotamocottus zopherus Jordan, Ann. Lyc. Nat. Hist. N. Y. 1876, 320.) 
Var. Carolina; (Gill) is a very large form, rather robust, reaching a length of nearly 
six inches, without axillary prickles, and with the palatine teeth well developed. 
The lateral line, as in the other forms, is sometimes continuous and sometimes inter- 
rupted. It abounds in the limestone region from Indiana to Tennessee, and is fre- 
quently found in caves. 
{Potamocottns carolinw GiW, Proc. Best. Soc. Nat. Hist. 1861, 40: Potamocottus Carolina} 
Gill, Simps. Eept. Ichth. Utah, 1877, 403.) 
1061 . U. Cope. 
Body slender, entirely smooth. Head not broad; maxillary reaching 
pupil. Lateral line deflexed below dorsal. Eye large, 5 in head; isth- 
mus as wide as distance from pnpil to snont; itreopercnlar spine stroug. 
Pectoral longer than head, reaching past front of anal, longer than 
usual in TJ . richardsoni. Head 3; depth G^. D. VII-17; A. 12; P.15, 
