36 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Galeus Rafinesque, Caratteri Alcuni Nuovi Generi, 13,1810; in part ( galeus , etc., although that species is not explicitly 
mentioned, the first species mentioned being a species of Pristiurus, P. melasloums). 
Galeovhinus Blainville, Bull. Sci. 1'iiilom. 1816,121 ({/aleus). 
Galeus Cuvier, RCgne Animal. Ed. I, 127,1817 (galeus). 
JSugaleus Gill, Proc. Ac. Nat. Sci. Phila. 1864, 148 ((/aleus). 
2. Galeus japonicus Muller & Henle. Fig. 2. 
Spiracles small; a short, labial fold on each jaw; second dorsal fin not much smaller than the first, 
and slightly in advance of the anal; length of caudal fin rather less than distance between the 2 
dorsals (Mfiller & Henle). 
This species was not obtained by us, the only Hawaiian reference being that of Dr. Steindachner, 
based upon a single specimen more than 5 feet long, from Laysan. It is more likely to he the Japanese 
species, Galeus japonicus, than the Californian, Galeus zgoplervs. Neither of these differs much from 
the European Galeus galeus. 
Galeus japonicus Muller & Henle, Plagiostomen, 68, pi. 22, 1841, Japan; Gunther, Cat., VIII, 380, 1870 (copied); Bleeker, 
Nat. Verb. Kon. Ak. Amsterdam, XVIII, 1879, 3 (name only); Jordan A Fowler, Proc. 1'. S. Nat, Mils., XXVI, 1903, 
611 (Onomichi, Hiroshima, and Nagasaki, Japan). 
Galeus vulgaris, Steindachner, Denks, Ak. Wiss. Wien 1900, 519 (Laysan); not of Cuvier. 
Genus 4. GALEOCERDO Muller & Henle. 
Month crescent-shaped; teeth alike in both jaws, large, oblique, coarsely serrated on both margins, 
with a deep notch on outer margin; spiracles present; caudal fin with a double notch; a pit on the tail 
above and below at base of caudal fin; first dorsal opposite the space between pectorals and ventrals. 
Large sharks found in most warm seas. Only one species known from Hawaiian or American waters. 
Galeocerdo Mfiller & Henle, Plagiostomen, 59, 1S38 ( tigriuus ). 
Borcogaleus Gill, Ann. Lyc. Nat. Hist. X. Y., VII, 1861. 411 (arcttcus). 
3. Galeocerdo tigrinus Muller & Henle. Tiger Shark. 
Head 7.25 in length; depth about 10; snout 3.33 in head; interorbital space 1.33; width of mouth 
at corners about 1.6; eye 5.66 in the interorbital space; space between nostrils 2. 
Body elongate, tapering to caudal; head very much broader than deep, depressed; eyes small, 
lateral, nearer snout than gill-opening; snout broad, short, rounded; mouth very broad, rounded; 
teeth numerous, rather large, compressed, with several basal cusps, and with edges more or less ser¬ 
rated ; a labial fold at corners of mouth; nostrils large, inferior, about midway between tip of snout and 
eye; interorbital space very broad, flat; spiracles very small, behind eye; gill-openings large, poste¬ 
riorly above base of pectoral. Body very finely roughened. First dorsal beginning about first fourth 
of interspace between origin of pectoral and that of ventral; second dorsal small, a little nearer origin 
of first dorsal than tip of caudal; anal small, beginning behind origin of second dorsal; pectoral rather 
long; ventrals very much nearer anal than pectorals; caudal very long, lower lobe produced; caudal 
pfeduncle rather short. 
Color brown above, whitish or pale below, upper surface with blackish markings, mostly in the 
form of dark crossbars. 
This shark is known from the East Indies northward to Japan, whence Gunther recorded a small 
example. Jordan and Snyder also record it from Japan, having examined the dried skin of a young 
