654 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



aa. Scales small; lat. 1. 65 to 80; aual rays III, 7 to III, 9; skull thick, cranial ridges 



very low or obsolete ; lower jaw 

 much projecting ; gill-rakers 

 very long and slender; caudal 

 emarginate; jaws scaly. (Se- 



BASTOSOMUS Gill.) 



h. Peritoneum white ; cranial ridges all obsolete, 

 c. Color olivaceous, nearly plain; caudal yellowish or greenish; mouth large. 



flavidus. 

 CO. Color dusky, sides spotted with black; caudal dark; mouth smaller.. »ieZrtnop«. 

 1)1). Peritoneum black. 



d. Supraocular and occipital ridges obsolete, without spines; colors dusky, the 



fins blackish, 

 e. Preocular ridges obsolete, the frontal region between them not specially 



convex ciliatus. 



ec. Preocular ridges present, usually ending in spines, the frontal region be- 

 tween them bulging., mystinus.' 

 dd. Supraocular and occipital ridges mostly present, ending in spines; dorsal 

 ^ fin not deej)ly emarginate; soft 



dorsal low. 

 /. Second anal spine scarcely or not longer than third; postocular spine 



wanting; color creamy olivace- 

 ous entomilas. 



ff. Second anal spine notably longer than third. 



Q. Body ovate; postocular spines x>resent; color chiefly creamy or oliva- 

 ceous oralis. 



gg. Body rather elongate ; postocular wanting ; color chiefly red. .p-on^/w. 

 aaa. Scales moderate ; lat. 1. 45 to 60 ; anal rays III, 5 to III, 7. 



h. Cranial ridges very low, the skull thick and solid; lower jaw little 



projecting; interorbital space 

 convex; gill-rakers slender, 

 usually long, 

 i. Color olivaceous ; postocular spine wanting ; mandible with a few 



smooth scales atrovirens. 



ii. Color red ; postocular spine present. 



j. Scales on mandible smooth ; color chiefly orange pinniger. 



jj. Scales on mandible very rough ; color chiefly brick-red . . miniatus. 

 hh. Cranial ridges more or less strong-; skull comparatively thin ; gill- 

 rakers generally short. 

 k. Postocular and tympanic spines both present ; interorbital 



space concave. (Sebastomus 

 Gill.) 



I. Cranial ridges broken and armed with accessory spines (in 



the adult, nearly smooth in 

 young); second anal spine 

 scarcely longer than third ; 

 color red, nearly plain. .n<6fj-. 



II. Cranial ridges smooth; second aual spine much longer than 



third ; color rosy, with three or 

 four round blotches of pink on 

 sides of back. 

 TO. Dorsal spines low, the highest less than half the length 

 of head. 

 n. Body everywhere with small round pale spots. 



constellatm. 



