460 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
The lateral line series of scales is separated by 54 (5 or even 44) 
rows from the origin of the second dorsal fin. There are 8 to 12 
parallel spinous carinae on the scales of the body in the type and 
large paratypes, but fewer on the smaller specimens. These carinae 
are less rugose than in the preceding two species; each is armed 
with as many as 14 rather weak retrorse imbricate spinules, which 
increase somewhat in size posteriorly, so that the last one projects 
a little beyond the margin of the scale. The scales of the head are 
much smoother and more prefectly imbricate than in maculatus or 
velifer, but less so than in notatus. The highly specialized ridge 
scales of the head are so similar to those of notatus that only the 
following diagnostic characters need be described. The dorsoterminal 
plate is more prominent, its length being contained 4.2 (4.4 to 5.2) 
times in the postorbital. There are but 5 to 7 scales on the ethmoid 
portion of the infraorbital ridge. The median occipital scute is 
armed by a single strong keel in the type, while in some of the 
paratypes a smaller pair of divergent lateral carinae are added; in 
all the specimens except one paratype, an additional scute, not so 
strongly modified, is located on the mid-dorsal line at the end of the 
first third of the distance between the first scute and the origin of the 
dorsal fin. The median of the three series of scales between the 
occipital and postorbital ridges is markedly enlarged. A few small 
scales posteriorly partially replace the prickles which in (C. notatus 
largely cover the fossa within the anterolateral margins of the snout; 
this region is consequently naked to a wider extent. The carinae on 
the opercular scales are mostly subparallel. The under surface of 
the head, the gill-membranes, and the nasal fossa are completely 
scaleless. 
The fins are essentially like those of related species. The simi- 
larity apparently includes the sexual dimorphism as regards the 
length of the fins, but the data for this species are meager, as In many 
cases the fins are broken. 
Table showing length of fin-rays in the two sexes. 
Male. Female. 
Type. Paratypes. Paratypes. 
length of second dorsal spine. <5). se cecisesies seein eee cee= se | 0.94 0:,093;t0:0:096)|S2e~ 5 see 
ength) of third dorsal rayse~ .6- occa aces eaae serene = secant 1.55 1.4 NN Sore 
Lengthiof-pectoralitin: 352. S-Sece ese eee taser ease caeee 19 2,75. .b012.0 2.1 to 2.15 
Length of outer ventraliray.- o: 52.2 s0-cesscscs sce. sess a LG7 |) el. Oat) 2.0 to 2.05: 
Length of second ventral ray ......-......-.----------.------- |; 3.0 | 2.95 to 3.32 3.5 to 3.6 
Base of the first dorsal contained 1.25 (1.0 to 1.4) times in the in- 
terdorsal space, and 1.5 (1.4 to 1.8) times in the postorbital length 
of the head. The origin of the anal lies below either the middle or 
the posterior part of the interdorsal space. 
