JORDAN, D.S. & SNYDER, J.O. 1902
Descriptions of two new species of squaloid sharks from Japan.
Proceedings of the United States National Museum, 25 (1279): 79-81
DESCRIPTIONS OF TWO NEW SPECIES OF SQUALOID
SHARKS FROM JAPAN.
BY DAVID STARR JORDAN (1) AND JOHN OTTERBEIN SNYDER,
Of the Leland Stanford Junior University.
In the present paper is given a description of two new species of
sharks from the deeper waters of the east coast of Hondo, the main
island of Japan. Both species belong- to the family of Squalidae.
I. ETMOPTERUS LUCIFER Jordan and Snyder, new species.
Head about 4 ¾ in length; depth about 7; snout about 2 3/4 in head;
eye 5 3/5 in head; 2 in snout, 2 4/11 in the width of snout, and 2 9/11 in the
space from the tip of the snout to mouth; space between spiracles 2 1/2
in the width of snout.
(1) Assisted by Henry W. Fowler
Fig. 1.—ETMOPTERUS LUCIFER, a, upper jaw; 6, lower jaw.
Body moderately elongate, rather robust, and with slender caudal
peduncle; scales rough, small, forming longitudinal striae above,
abruptly and sharply separated on the sides from the lower surface,
which is evenly rough with tine shagreen.
Head large, thick, rather short; snout rather short, thick, more
convex below than above, and also with many pores; eyes moderate,
lateral, and with anterior margin midway between the tip of the snout
and the spiracle; skin about the eyes more or less loose and free, and
the upper eyelid overlapping and forming a pit in front; nostrils very
large and lateral; mouth opening below the posterior portion of the
eye and broad; lips rather thin; teeth .small, compressed, and each of
those in the upper jaw with two sharp basal cups; spiracles large,
nearer the eye than the first gill opening, and the space between
1 1/7 in the snout. Gill-opening in front of the base of the pectoral,
and rather short. Dorsal fins each with a spine, the base of the first a
little before the tip of the pectoral, short, sharp pointed and projecting
a little above the skin; the second dorsal spine not as high as the
fin, but much larger and longer than the first, with the greater portion
exposed, and nearly a third greater than the snout; ventrals moderate
and entirely in front of the second dorsal; caudal elongate and the
lower lobe little produced.
Color in spirits dark grayish brown, and the lower margin of the
caudal, together with the marginal portions of all the other fins, very
pale brown. The pale areas on the sides of the belly cover a glandular
substance said to be luminous in life.
This description from .specimens from Misaki, measuring 12 inches,
from the collection of Capt. Alan Owston, No. 6863, Stanford Univer-
sity Zoological Museum. Some thirty others of the .same species were
obtained off Misaki on long lines handled by Mr. Kumakichi Aoki,
assistant to Professor Mitsukuri.