1893.] Zoology. 669 
true-relationship. This relationship is usually borne out by a number 
of subsidiary characters. Considering the constancy of the spines, 
reinforced by subsidiary characters, we have divided the species 
usually united under the generic name Sebastodes as follows :— 
a. Parietals meeting above the supra-occipital. 
b. Jawsequal; head narrow above ; high and prominent cranial 
ridges ending in spines ; preocular, supraocular, tympanic and 
parietals present. Scales usually very strongly ctenoid ; access- 
ory scales numerous ; suborbital stay directed obliquely down- 
ward and backward; second anal spine much heavier than, 
and atleast as long as the third; body short and deep, back 
arched ; mouth very large; head heavy. All known species 
with cross bands. 
SEBAsTICHTHYS Gill, 
nigrocinctus, serriceps, rubrivinctus, diploproa.* 
bb. Lower jaw much projecting; head broad, the skull usually 
convex ; cranial ridges when present low; gill-rakers very 
long and slender; scales usually smooth, few if any accessory 
scales. Suborbital stay little if at all oblique. 
c. Parietal ridges ending in spines; preocular, supraocular and 
tympanic spines well developed. Peritoneum black. 
d. Postocular spine present. Second anal spine usually stronger 
and longer than third. Symphyseal knob strong, projecting 
forward. Dorsal low. (Peritoneum black, mandibles and 
maxillary scaled.) 
. Acutomentum' E & B. 
YType 4. ovalis (Ayres). 
melanostomus, ovalis, rufus, Falutus, Fiordi n. sp. nov.— 
S. proriger E. & G. not of J. & G. 
dd. Postocular spine not developed. 
We have not been able to examine the two species (entomelas 
and atrovirens) and cannot vouch for their position. 
cc. Parietal ridges not ending in spines. 
e. Preocular spines well developed. Supraocular and tympanic 
inter-opercle frequently ending in spines. PRIMosPINA' E. 
B. f nl 
2Type P. mystinus (J. & G). 
The only species (mystinus) is the most variable species of 
the group. 
