2/6 Roosevelt Wild Life Annals 



Sthostcdion eanadensc (Smith) Sauger 



Apomotis cyanellns (Rafinesque) Green Sunfish 



Aplodinotus grunniens Rafinesque Sheepshead 



Cottns cognatus Richardson Muddler 



To be able to use the keys for identification and to comprehend descriptions 

 of species fully, some attention should be given to fish structure, such as is shown 

 by a large minnow like the Creek Chub, a sunfish — or better, a Rock Bass — and 

 a catfish. The outline sketches of each of these three types (Figs. 179, 180 and 

 181) will be helpful in learning the external characters employed in identification. 

 A glossary of technical terms follows the key, which may be used as a dictionary 

 of terms used in it. 



Explanation of Abbreviations for Figures 179, 180 and 181. 



Ad f. — Adipose Fin lop. — Interopercle 



Af. — Anal Fin LI. — Lateral Line 



A sp. — Spinous portion of Anal Fin Md. — Mandible 



As.— Soft Anal Fin Mx.— ALixiUa 



C— Chin Mxb.— Maxillary Barbel 



Cb.— Chin Barbels N.— Nostrils 



Cf. — Caudal Fin Op. — Opercle or Gill-cover 



Ch.— Cheek Pf.— Pectoral Fin 



Cp. — Caudal Peduncle P Mx. — Premaxilla 



Df. — Dorsal Fin Pop. — Pre-opercle 



Ds. — Soft Dorsal Fin Psp. — Pectoral Spine 



D sp. — Spinous Dorsal Fin V. — Vent or Anus 



Go. — Gill Opening Vf. — Ventral Fin 

 L — Isthmus 



Key to the Species of Fish Known to Occur in Oneida Lake, New York 

 (Modified from Meek and Hildebrand, 1910.) 



PAGE 



a. Gill openings 7 on each side; paired fins absent; mouth without jaws, but surrounded by a 



circular, concave buccal disk. Nostril single and median Petr omyzon mariniis 283 



aa. Gill opening single on each side; paired fins present; jaws present; nostrils four. 

 b. Ventral fins abdominal, when present. 



c. Tail heterocercal ; a gular plate on lower jaw Amia calva 293 



cc. Tail not heterocercal. No gular plate. Vertebral column ending near base of caudal 

 fin. 

 d. p(Tt'.rri! fin= cn'li v.itb n =trong spine; head with long barbels; scales absent; dorsal fins 



'ii\' ridge from skull to first dorsal fin, which can be felt under 



' .11 the sides Ictalurus punclaltts 369 



ririge from skull to dorsal interrupted; color dark or varic- 



audal fin behind. 



Iiout 24-27 rays; its ventral margin quite straight. Chin 



I. Pectoral spine with barbs Ameiunis natalis 382 



' \\<r than about 24 rays; its ventral margin rounded. Chin 



lir.ky Ameiunis nehnlostis 372 



connected with caudal fin behind. 



h. Pectoral spine nearly smooth; color dark, not variegated Schilbeodes Rvrinus 384 



" ti. Pectoral spine distinctly serrated on its posterior margin. Color variegated 



Schilbeodes miurus 385 



