398 
BULLETIN 'OF THE UNITED STATES FISH COMMISSION. 
t 
Family TETRAODONTIDAE. 
Ovoides latifrons Jenkins, new species. Fig. 10. 
Length of head 2.7 in length of body, width of head 3.7. Snout (to tip of dental plates) 2 in head. 
Interorbital space flat, wide, 6.25 in length of body, equal to snout from nostril. Eye 4.33 in head. 
Nostrils a simple, bifid, nonperforate tentacle on each side. Dorsal profile evenly rounded, belly 
distensible. D. 10; A. 12; P. 19. Dorsal rays 2 in head; anal rays a little shorter than dorsal. 
Pectoral 1.33 in snout. Caudal fin rounded, equal to distance from tip of dental plates to center of 
pupil. All parts of body and posterior parts of head covered with small, simple, setse-like spines, 
mostly embedded in the skin, having only the tips projecting, most of them inclined backward. None 
on the caudal peduncle. (The specimen described has the base of the dorsal fin covered by a fold of 
the integument from the right side. This, however, occurs as a “freak” in Ovoides setosus .) 
Color in life: Light brown, covered with rather closely set white spots. Spots distributed over 
entire surface of head and body, those on the chin smaller than the others, a few on dorsal, anal, and 
caudal fins; pectorals spotted at base; nasal tentacles black; iris yellow. 
ppiill 
i m % 
TO. Ovoides latifrons Jenkins, new species. Type. 
This species is very similar to Ovoides setosus 1 of the west coast of tropical America, differing from 
it in the greater width of the interorbital space, the interorbital being 8.33 in the length of the body 
in 0. setosus and 6.25 in 0. latifrons. 
One specimen, 188 mm. long, collected by me at Honolulu. Type No. 49696, U. S. N. M. 
The following table gives comparative measurements and numbers of fin rays of the one specimen 
of Ovoides latifrons and of three specimens of 0. setosus in the Stanford University collection from the 
Revillagigedo, Cocos, and Galapagos Islands: 
Measurements.; 
Ovoides 
latifrons. 
Ovoides setosus. 
Measurements. 
Ovoides 
latifrons. 
Ovoides setosus. 
No. 1. 
No. 1. 
No. 2. 
No. 3. 
No. 1. 
No. 1. 
No. 2. 
No. 3. 
Length in millimeters 
188 
205 
142 
141 
Longest anal ray 
.16 
.14 
.18 
.19 
Length of head 
.37 
.33 
.31 
.32 
Longest pectoral ray . 
.14 
.15 
.15 
.17 
Width of head 
. 27 
.28 
.31 
.32 
Longest caudal ray. . . 
.25 
.22 
.21 
. 27 
.20 
.17 
.17 
. 19 
10 
11 
10 
.095 
. 10 
. 10 
.10 
12 
12 
12 
11 
Interorbital width . . . 
.16 
.12 
.13 
.12 
Pectoral rays 
19 
18 
17 
17 
Longest dorsal ray . . . 
. IS 
.17 
.19 
1 Tetraodon setosus Rosa Smith, Bull. Cal. Acad. Sci., n, p. 6, 1886 (Mexico). 
