430 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Iatifrons, a specimen about 8 inches long, and 2 examples (No. 08409, 12 inches long, and No. 05574, 
9.5 inches long) obtained by us at Honolulu. 
Tetrodon laerymatus Cuvier in Quoy & Guimard, Voy. Frame, 204, 1824, Sandwich Islands. 
? Arotliron ophryas Cope, Fishes Lesser Antilles, in Trans. Amer. Philos. Soc., XIV, 1871, 470, Navigator Islands. 
’ Tetrodon meleagria, Smith & Swain, Proc. F. S. Nat. Mus., V, 1882, 141 (Johnston Island); probably not of Laeepede. 
? Oroides ophryaa, Fowler, Proc. Ac. Nat. Sci. Phila. 1900, 528, pi. xx, tig. 2; after Cope's type. 
Oroides Iatifrons Jenkins, Hull. U. S. Fish Comm., XIX, 1899 (June 8,1901), 398, fig. 10, Honolulu. (Type, No. 49690, F. S. X. M. 
Coll. Dr. Jenkins.) 
Family LXXIX. CANTHIGASTERIDiE.- -The Sharp-nosed Puffers. 
This family includes small puffers, similar in external appearance to the Tetraodontkhe, but with the 
snout sharp and the back more or less compressed or ridge-like. The skeletal characters by which 
the group is defined are thus given by Doctor Gill: Medifrontals separated from the supraoecipita] 
by the intervention of the sphenotics, which are connected and laterally expanded, but short; the 
prosethmoid prominent above, enlarged and narrowed forward. Vertebrae about 8 -f 10. Plead 
compressed, with a projecting, attenuated snout; dorsal and anal short, few-rayed. Nostrils wanting 
or little developed. Tropical seas; small species; none of them reaching a length of more than 6 
inches. 
Genus 196. CANTHIGASTER Swainson. 
Body short, deep and compressed, the back more or less sharply ridged; nostrils very small and 
inconspicuous, apparently sometimes imperforate. 
Ca.ntUigast.er Swainson, Class. Fishes, etc., II, 19-i, 1839 (diagnosis only; no type mentioned). 
Psilonotus Swainson, 1. <•., II, 328, 1839 ( rostratus ): substitute for Canthigaster; not Psilonotm , a. genus of Hymenoptera of 
prior date. 
Prilonotus (Kaup MS.) Richardson. Voy. Herald. 162, 1854 ( rostratus ); a misprint. 
Tropidichthys Bleeker, Nat. Tyds. Nederl. Ind., VI, 1854, 500 ( valentini ). 
Anosmius Peters, Wiegmann’s Archiv 1855, 274 ( Ueniatus ). 
Rhynchotus (Bibron MS.) Hollard, Etudes Gymnodontes in Ann. Sci. Nat. 4th ser. Zool., VIII, 1857, 320 ( personi ). 
Eumycterias Jenkins, Bull. F. S. Fish Comm., XIX, 1899 (June 8 , 1901), 399 ( bitnniatus ). 
a. Body almost everywhere covered with small prickles; body not barred. 
h. Snout, with small prickles. 
c. Body with white spots; caudal peduncle without spinules; interorbital equal to eye, slightly concave; dorsal rays 9. 
jactator , p. 430 
cr. Body with white and black spots; caudal peduncle with spinules; interorbital flat, wider than eye; dorsal rays 11. 
oahuensis, p. 432 
bb. Snout, without prickles; body and head, except snout, with prickles; dorsal rays 10; body with broad dark bars. 
cinctus, p. 433 
aa. Body mostly smooth. 
d. Dorsal rays more than 10; body with dark spots. 
e. Snout long, 1.5 in head; dorsal rays 11 . psegma, p. 433 
ee. Snout about 2.5 in head; dorsal rays 13 . janthinus, p. 434 
dd. Dorsal rays 10. 
/. Body with dark spots; small prickles on sides, caudal peduncle, belly, dorsal fin, and a patch on lower part 
of cheek . epilamprus, p. 434 
ff. Body with two dark lines; a few minute spines on lower surface of body, otherwise smooth, .bitxniatus, p. 435 
352. Canthigaster jactator (Jenkins). Fig. 187. 
Head 2.66 in length of body; depth of body from back to lower edge of base of pectoral 3..83 in 
length. Eye equal to interorbital space, 2 in snout; I). 9; A. 10; P. 16; C. 7. Profile rising from tip 
of snout to middle of back where the median dorsal crest forms a prominent point; dorsal profile of 
head concave from tip of snout to eyes, straight, from eyes to dorsal prominence. Interorbital space 
very slightly concave; profile descending to a straight line from apex of hack to dorsal tin, from dorsal 
fin to caudal fin descending with gentle concavity; caudal peduncle deep anteriorly, depth just hack 
of dorsal and anal fins equal to snout; much less deep posteriorly, depth just before bases of caudal 
rays 2.33 in head; ventral parts of body much dilated, depth below pectoral 1.25 in depth above pec¬ 
toral; dorsal and anal fins very short, dorsal above anal; rays equal, about 3 in head; caudal slightly 
