ro.l324. ELASMOBRANCHIATE FISHES— JORDAN AND FOWLER. 611 



Galeorhiniis Blainville, Bull. Sci. Philom., 1816, p. 1"21 {galeus). 

 Oaleiis CvviER, Regne Animal, Isted., 1817, p. 127 (r/aleus). 

 Eugakus Gihh, Proc. Ac. Nat. Sci. Phila., 1864, p. 148 (galem). 



I First dorsal opposite the space between the pectorals and ventrals; 

 mouth crescent-shaped, with the teeth alike In l)oth jaws, ohli((ue, 

 notched, and .serrated; spii-acles present, small; nictitatino- nuMn})rane 

 [present; no pit at the base of the caudal; caudal tin with a single 

 notch. Tropical seas. 

 [yaXeos^ a kind of shark, like a weasel.) 



10. GALEUS JAPONICUS (Miiller and Henle). 



1 YERAKUFUKA.« 



Galeus japonicus Muller and Henle, Plagiostomen, 1838, p. 58, pi. xxii; Naga- 

 saki. — DuMERiL, Elasmobranches, I, 1870, p. 391 (after Muller and Henle). — 

 GuNTHER, Cat. Fish, VIII, 1870, p. 380 (after Miiller and Henle).— Nystrom, 

 Kong, Svensk, Vet. Ak., 1887, p. 50; Nagasaki. 



' Head Ci in head; depth 9^; width of head If in its length; inter- 

 iorbital space 2i; snout 2f ; pectoral li; width of mouth 2f ; e^^e 2i in 

 interorbital space. 



'; Body elongate, back elevated in front, sides compressed. Head 

 greatly depressed, elongate, convex above, flattened beneath; snout 

 ipointed in profile; when viewed from al)ove, roundly pointed, flattened; 

 :oyes elongate, lateral; nictitating mom])rane large, well de\eloped; 

 mouth crescent shaped, though rather bluntl}' obtuse at symphysis of 

 [mandible; corners of mouth each with a well-developed labial fold; 

 teeth very ol)lique, without serrations on their edges, and with .several 

 jshort cusps behind; nostrils laterally inferior, moderately large, nearer 

 [mouth than tip of snout; interorbital spac(; liroad, slightly elevated 

 and flattened in middle. Spiracle a small slit a short distance behind 

 eye. Gill openings 5, in front of the base of pectoral above. 

 I Surface of body. finely roughened. 



Dorsals similar, far apart, ongin of first much nearer tip of snout 

 than origin of second; origin of .second dor.sal nuich in advance of anal, 

 nearer first dorsal than tip of snout, and midway between origin of 

 ventral and origin of lower caudal lol)e; anal small, its origin nearer 

 .caudal than ventrals; pectorals large, with emarginate edges, reaching 

 [beyond origin of dorsal; ventrals behind first dorsal, their origin 

 nearer that of anal than origin of pectoral; caudal much larger than 

 head, with a notch near tip so that terminal portion is one and two- 

 ithirds the lower lobe. Caudal peduncle long, much deeper than broad, 

 flattened above and below, without any pit. 



Color in alcohol light gray-brown, below lighter or whitish. 



Length 26i inches. 



oYeraku, the antefeudal period; foika, shark. Yeraku is the name of the period 

 in Japanese history preceding the feudal period, or Tokugawa. It closed about 1600. 



