PHILIPPINE MACROUROID FISHES—GILBERT AND HUBBS. 429 
ad’. No round blackish spot above and behind the pectoral fin; sec- 
ond dorsal fin as high anteriorly as the anal. 
o. Snout, 2.2 in head; orbit, 3.7; least interorbital width, 1.2 in 
orbit; interdorsal space two-thirds as long as the first dorsal 
base; body conspicuously mottled anteriorly, barred posteri- 
orly ; one species from northern Luzon and Formosa. 
cingulatus. 
o*. Snout, 2.4 in head; eye, almost 3 in head; interorbital width 
1.8 in orbit; interdorsal space one-third as long as base of 
first dorsal; body without dark markings; one Australian 
SSO CCC heir tel eke gee ee ene lal aes ea eT ee innotadbilis. 
Cc’, Spinules on scales on strongly divergent carinae, the lateral ones of 
which are often weaker than the median; anus always immediately 
before anal fin; second dorsal spine equal to, or less than, the 
postrostral length of head; body usually without definite dark mark- 
ings; an apparently natural group of species, with its center of dis- 
AD UGOnE IMs phex Mast, Imdieges = 3 ee eee OXY MACRURUS. 
a. Orbit very large, longer than the postorbital length of head; 3 to 5 
spinous ridges on scales; distance from anus to ventral greater 
than length of orbit; snout comparatively short; one Chilean 
SS TD CL a a a a a es se chilensis. 
a’. Orbit moderate, shorter than postorbital length of head; Indo- 
Asiatic species. 
b*. Snout less than twice as long as orbit in adult. 
c’. Snout without an acuminate tip; sides of snout very convex, the 
width between its anterolateral angles 0.75 or 0.8* in length 
before that point; scales on ridges of head, especially on in- 
fraorbital ridge, enlarged and strengthened much more than 
usual in this subgenus; flesh soft (platorhynchus group). 
d@d. Underside of head and lower part of nasal fossa scaled; 5 to 7 
strong spinous carinae on scales of body; scales from top of 
head usually with a single strong median keel; 4% rows of 
scales in a series between lateral line and origin of second 
dorsal; infraorbital ridge scales in a double series on Ssub- 
orbital and preopercular regions, that is, behind middle of 
eye; area between ridge and orbit covered by small scales; 
orbit 1.2 to 1.25 in postorbital length of head; least inter- 
orbital width shorter than length of orbit, 1.5 to 1.7 in post- 
orbital; preoral length of snout, 2.9 to 3.3 in head; length of 
IMAXAVAT Yew iO staal eee 2 aes eek I ys ee platorhynchus. 
d. Underside of head and nasal fossa completely naked; scales 
from top of head usually with several carinae. 
e. Four to seven strong spinous carinae on scales of body; 
4 rows of scales between lateral line and ‘origin of second 
dorsal; infraorbital ridge scales in a double series on 
preopercular, suborbital, and posterior part of preorbital 
regions, that is, behind front of eye; area between ridge 
and orbit naked; orbit, 1.15 in postorbital length of head; 
least interorbital width decidedly shorter than length of 
orbit, 1.5 to 1.6 in postorbital; preoral length of snout, 
2.9 to 3.05 in head; length of maxillary, 3.9. o 
acantholepis. 
10.85 in a young specimen of OC. acantholepis 60 mm. lceng to anus. 
