436 Storer’s Synopsis of the Fishes of North “America. 
ccecal appendages to the pylorus, and in possessing a cordiform natatory blad- 
der. From the Esoces, it is distinguished by the presence of cecal ap- 
pendages. From the Siluride, it differs in the existence of scales and ceca, 
and by the absence of cirrhi. From the Salmonide, by the existence of 
but two ccecal appendages, and by the absence of the adipose dorsal fin. 
GENUS I. AMBLYOPSIS, Dexay. 
Body with scales. Vent anterior to the base of the pectorals. Eyes not 
apparent, even upon careful dissection. Ventrals minute. A single dorsal. 
Teeth on the jaws and palatines. No scales upon head, but slightly elevated, 
transverse ridges are observed upon it. No barbels. 
1. Amblyopsis speleus, DeKay. 
Whitish. Head broad and flattened. Mouth large. Most of the fins with filamentous 
tips. 
D.7. P.12. V.5. A.8. C. 162. Length, 34 inches. 
Mammoth Cave, Kentucky, Dexay. 
Amblyopsis speleus, DeKay’s Report, p. 187. 
me ss Wyman, Silliman’s Journal, xiv. p. 94. 
FAMILY XVIII. ESOCIDZ. 
Body elongated. One dorsal, and generally opposite to the anal. Edge of 
the upper jaw either formed solely by the intermaxillaries, or if the labials 
enter at all into its composition, they are destitute of teeth. Intestinal canal 
short, without cceca. Branchial rays vary from three to eighteen. Mouth 
large, and without sharp teeth. 
GENUS I. ESOX, Cov. 
Head depressed, large, oblong, blunt ; intermaxillaries small, with small 
pointed teeth at the middle of the upper jaw, of which they form two bands. 
The maxillaries forming the sides have no teeth. The vomer, palatines, 
tongue, pharyngeals, and branchial arches, bristled with card-like teeth. Sides 
of the lower jaw with a row of long, pointed teeth. 
1. Esox estor, Lesurur. 
Back deep greenish-brown ; sides with numerous rounded and oblong pale-yellowish spots ; 
