154 THE PLAGIOSTOMIA. 



symphysis, lower shorter. Teeth sub-triangular, alike in the two jaws, oblique, 

 inclined outward, in §§^-5 rows, smooth-edged except between the notch, on 

 the outer edges, and the base where there are denticles; median smaller, notched 

 on both sides. A couple of rows at each side of the median row are little larger. 

 Eyes moderate, with a nictitating membrane, pupil vertical. Spiracle small, 

 behind the middle of the eye. Pectorals larger than the dorsals, two thirds as 

 wide as long, applied to the side subtending half or more of the dorsal. Origin 

 of first dorsal behind the end of the pectoral base, fin much nearer to the pectorals 

 than to the ventrals. Second dorsal small, origin little in advance of that of the 

 anal. Anal little smaller than second dorsal, base extending slightly farther 

 back. Ventral origins nearly in the middle of the total lengt h. Caudal less than 

 one fourth of the total length, distance from the produced lower lobe to the notch 

 behind the subcaudal short. 



Back brown, olive to ashy or rusty: lower surfaces, hind margins of pectorals 

 and hind ends of dorsals white, end of tail and upper border of dorsal darker. 



A specimen from the Mediterranean measures in total length 23i from snout 

 to abdominal pores 12, to hindmost gill opening 5, to mouth if and in length 

 of caudal fins 05 inches; one from San Diego, Cal., is in total length 25, from 

 snout to pores 12|, to hindmost gill opening 6, to mouth 2g, and in length of 

 caudal fins 6| inches. The slight differences in proportions appear to be quite 

 within the range of individual variations. 



•EUGALEUS JAPANICUS. 



Galeusjapanicus Muller & Hesi.e, 1841 , Plagios., p. 5S, pi. 22; Dumeril, 1865, Elasm., p. 391 ; Gunth., 

 1870, Cat,, fishes Brit, mus., 8, p. 380; Nystrom, 1887, K. Svensk. vet. akad. handl., 50; Jord. & 

 Fowler, 1903, Proc. U. S. nat. mus., 26, p. 611; Pietschmann, 1908, Sitzb. Akad. wiss. Wien, 

 117, p. 51. 



As compared with the preceding, E. galeus, the snout of this species is shorter, 

 the anterior nasal valve is broader and more rounded, the mouth is shorter, the 

 pectorals are longer and more pointed, the dorsal is farther hack and about as 

 near to the ventrals as to the pectorals, the second dorsal is larger and extends 

 farther forward from the anal, the ventrals are farther in advance of the middle 

 of the total length, the anal is much smaller in comparison with the second dorsal 

 and is farther backward, the caudal is smaller, has a sharper subcaudal lobe and 

 a longer distance from the lobe to the subcaudal notch. The teeth have two 

 strong denticles between the notch on the outer edge and the base. 



Japan. 



