222 ON THE DISTRIBUTION OF FRESH-WATER FISHES 



Scales 7 — 44 — 15 ; eye larger, equal interorbital width, 4-33 in head ; 

 operculum not prolonged, flap quite short, light-edged ; caudal pe- 

 duncle and fin 3-3 in length; mucous caverns moderate; not red- 

 spotted, MICEOPS. 



««. Lateral line descending gradually to caudal peduncle. 

 /3. Five or six series of scales on the cheek. 

 y. Supraoccipital mucous cavity large ; a deep groove along 

 vertex of cranium. 

 Eye large ; scales of operculum small ; maxillary to beyond middle 

 pupil ; longest dorsal spine equal muzzle nearly to posterior edge 

 orbit. Light olive, a mere trace of opercular spot ; four dusky bars 

 from orbit backwards. ........ gillii 



r/- Supraoccipital mucous cavity small ; no groove on vertex. 

 Eye moderate, one-fourth of head ; form elongate compressed ; scales 

 of operculum large; longest dorsal spine equal muzzle and orbit ; 

 maxillary to front edge pupil ; bluish, without markings except 

 black spot on second dorsal, and same on very short opercular tlap, Ardesiacus.* 

 Eye moderate, four times in head ;-j- opercular scales large; longest 

 dorsal spine equal from end muzzle to middle pupil, end of maxil- 

 lary reaching latter point ; blue-grey, closely spotted with dark 

 brown ; second dorsal, caudal and anal marbled with same ; no 

 bands on head ; black ear-flap short, ...... nephelus.J / 



; 

 * Ijepomis ardesiacus Cope, sp. uov. • / 



This species is characterized by its compressed ovate form, small scales, long spines, and small ear-flap. 

 Scales 6 — 45 — 17, those of the pectoral region considerably larger than those of the cheek. Depth 2'33 in ' 



length, head 8'1 in same. Kye four times in head, barely equal muzzle ; I'L in interorbital width. Mucous 

 cavities small, front rather flat. Mandible longer than prema.xillary; ma.\illary extending to between lines of 

 orbit and pupil. Ventral and pectoral fins attaining anal ; third anal spine equal from end muzzle to posterior 

 margin pupil. Fourth and fifth dorsal spines longer than soft portion, ninth and tenth equal. 



Total length 3 in. 11 lin. ; from end muzzle to first dorsal ray 16'2 1. ; basis of first anal 2 in. ; depth at first 

 dorsal ]5-75 ; at fifth soft dorsal 11-75 1. Radii D. X. 11. A. III. 11. P. 13. 



Color steel-blue in spirits, withoat markings ; a small opercular black spot without pale margin, whioh is 

 prolonged in a faint brown streak to the preoperculnm. Au indistinct spot at posterior margin second dorsal. 



Habitat. — Kiskiminitas River, Western Pennsylvania ; discovered by Addison R. Guss. 

 This species resembles the Leporais longispiuis Cope. I had thought it once the Ichthelis cijanella 

 Rafinesque, Ichthyologia Oh. 28 ; but that must be a slender species, as he says " diameter one-fifth ;" " anal 

 rays 12, whereof 3 are spiny," " pectoral fins very short;" all which features are not to be seen in this species. 



t To origin opercular fiap. / 



X Lepomis nephelus Cope, sp. nov. , 



This is a symmetrical elongate species, with quite a peculiar coloration. 



Depth 2-4 in length ; head 2-82 in same ; eye equal muzzle, 4-2 in head, 1-2 in interorbital width ; mucous 

 cavities small; five rows scales on cheek ; pectoral scales larger than the latter. Scales 6 — 42 — 15. Opercular 



