G54 CONTRIDUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
aa. Scales small; lat. 1. 65 to 80; anal rays HI, 7 to III, 9; skull thick, cranial ridges 
very low or obsolete; lower jaw 
much projecting ; gill-rakers 
very long and slender; caudal 
emargiuate; jaws scaly. (Se- 
BASTOSOMUS Gill.) 
6. Peritoneum white ; cranial ridges all obsolete. 
c. Color olivaceous, nearly plain; caudal yellowish or greenish; mouth large. 
Jiavidus. 
cc. Color dusky, sides spotted with black; caudal dark; mouth smaller., welniiops. 
l)b. 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., mt/stinus. 
dd. Supraocular and occipital ridges mostly present, ending in spines; dorsal 
• fin not deei^ly emarginate ; soft 
dorsal low. 
/. Second anal spine scarcely or not longer than third; postocular spine 
wanting; color creamy olivace- 
ous entoimlus. 
ff. Second anal spine notably longer than third. 
g. Body ovate; postocular spines present; color chiefly creamy or oliva- 
ceous oralis. 
g(j. Body rather elongate ; postocular wanting ; color chiefly red.. prorif/er. 
aaa. Scales moderate; lat. 1. 45 to 60; anal rays III, 5 to HI, 7. 
h. Cranial ridges very low, the skull thick and solid; lower jaw little 
projecting; interorhital space 
convex; gill-rakers slender, 
usually long. 
i. Color olivaceous; postocular si)ine wanting; mandible with a few 
smooth scales atrovirens. 
it. Color red ; postocular spine present. 
j. Scales on mandible smooth ; color chiefly orange pmniger. 
jj. Scales on mandible very rough ; color chiefly hrick-red. .?« in ia<MS. 
hh. Cranial ridges more or less strong ; skull comparatively thin ; gill- 
rakers generally short. 
k. Postocular and tympanic spines both present ; interorhital 
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. .rnfee?'. 
II. Cranial ridges smooth; second anal spine much longer than 
third ; color ro.sy, with three or 
four round blotches of pink on 
sides of back. 
m. Dorsal spines low, the highest less than half the length 
of head. 
n. Body everywhere with small round pale spots. 
constellatus. 
