670 The American Naturalist. [July, 
ee. Preocular without spine, skull smooth, without spines. 
Peritoneum usually white 
SrEBAsTOsOMUS Gill. 
flavidus, serranoides, melanops, *ciliatus. 
aa. Parietals separated by the supra-occipital. 
f. Cranium with parietal ridges only. Lower jaw much project- 
ing, entering the profile; a prominent symphyseal knob 
directed forward. Head broad, convex. Interobital con- 
vex, nearly smooth. 
SEBASTODES Gill. 
paucispinis, goodei. 
* Species marked with an asterisk have not been examined in refer- 
ence to the characters utilized. 
ff. Cranium with many ridges, all ending in spines. 
g. Postocular and tympanic spines both present. Interopercle 
and subopercle without spines. Lower pectoral rays nor- 
mal. 
h. Coronal spines; nuchal vm a spine below, another in 
front of eye. matzubarae with this species we 
are not acquainted. 
hh. No coronal spines SEBAsTOMUS Gill. 
miniatus, pinniger, levis, aereus*, constellatus, umbrosus*, rosaceus, 
rhodochloris*, gilli*, rupestris*, eos, chlorostietus*, ruber* ru 
gg. Postocular spine wanting. 
i. Coronal spines none. 
Preropopus E. & B. 
Species with normal pectoral rays, (living off the bottom) 
saxicola*, proriger[*, brevispinis*, elongatus, sinensis. 
Species with lower pectoral rays thick (living on the bottom) 
zacentrus*, maliger, caurinus, vexillaris, rastrelliger, nebulo- 
sus, carnatus, chrysomelas. 
ii. Coronal spines present. 
AvcTOsPINA E. & B.? 
aurora*, auriculatus. 
+ The specimen described by E. & E., Proc. Cal. Acad. Sci. (2) III, 
15, 1890, is a species distinct from proriger. 
The inter-relationship of these genera is complex. It may be repre- 
sented by the following diagram where the genera with the united 
parietals are followed by an asterisk. 
YType P. maliger (J. & G). 
2Type 4. auriculatus (Girard). 
