85. PEECID.E - PCECILICHTHYS. 515 



fl. Dorsal spines 8 or more; anal spines well developed. 



b. Humeral region with an enlarged black scale-like process. 

 t-. Cheeks and opercles naked ; nape naked ; body striped ................ virgatus. 



cc. Cheeks and nape naked ; opercles scaly .............................. mxatilis. 



ccc. Cheeks, opercles, and nape more or less scaly ............ punctulatus, arteaicc. 



bb. Humeral scale obsolete or wanting. 



d. Opercles and cheeks naked ; preopercle cremilate; anal spines very long. 



lepidus. 



dd. Opercles scaly ; preopercle strictly entire. 

 e. Lateral line nearly straight. 



/. Cheeks naked; or with only 3 or 4 small imbedded scales close behind 

 eye ............................................... cu-rnleus, spectabilis. 



ff. Cheeks evidently scaly, at least above ................ asprigenis, Jessica. 



cc. Lateral line forming a slight curve above the pectorals; dorsals sub-equal. 



Dorsal spines 9 or 10. (Boleichihys Girard. ) 

 g. Cheeks scaly ......... butlerianus, barratti, fnsiformis, erochrous, eos. 



ijrf. Cheeks naked ............................ exilis, warreni, gracilis. 



aa. Dorsal" spines 6 ; anal spines obsolete ? (All-arms') ..... . ............... . laieralis. 



a. Dorsal spines 8 or more; anal spines well developed. 



b. Humeral region with an enlarged scale-like process, which is always black. 

 c. Opercles, cheeks, and nape naked ; body striped. 



86. P. virgatus Jordan. 



Body slender, subfusilorm, compressed, the back somewhat elevated, 

 the caudal peduncle rather deep. Head long 1 , rather slender and pointed, 

 little compressed, the snout but little decurved. Mouth rather large, 

 somewhat oblique, the maxillary reaching to the pupil, the lower jaw 

 scarcely shorter than the upper ; teeth small, even, in several rows. 

 Eye rather large. Posterior border of preopercle above, obtusely cre- 

 nate. Scales rather large; lateral line distinct, on about 20 scales; 53 in 

 a lengthwise series. Head naked ; nape and breast naked. Color green- 

 ish, each scale with a small blackish spot, forming conspicuous lateral 

 stripes, as in EtJteostoma lineolatum ; back and sides with cross-blotches ; 

 humeral scale large and black ; dorsal and caudal fin faintly barred. 

 Head 3| ; depth 5. D. IX-10 ; A. II, 8. Kock Castle Kiver, Kentucky ; 

 resembles the species of Etlieostoma. 



(Jordan, Proc. U. S. Nat. Mus. ii, 236, 1879.) 



cc. Clieeks and nape naked ; opercles scaly. 



P. saxatMas Hay. 

 Body rather slender. Head pointed, the profile descending in a 

 gradual curve. Mouth large, the maxillary extending to opposite front 

 of pupil. Eye equal to snout, 4 m head. Cheeks, breast, and throat 

 naked ; opercles with a few large scales. Lateral line little arched, its 

 tubes on about 35 scales. Dorsals well separated, the second shorter 

 and higher than first. Greenish, with darker tessellations; a black 



