202 



ART, 2. — H. MATSUMOTO 



AmpJiiura enopla : Claek, Bull. U. S. Nat. 3Ius., LXXV, 1911, p. 144, 



fig. 57. 



One specimen ; Enoshima, Sagami. Numerous specimens ; 



Misaki. Numerous specimens ; Izubara, Tsushima. 



Off Osé Zaki, Suruga Gulf ; 

 45-60 fathoms (Clakk). 



The specimen from Eno- 

 shima is the largest of all, being 

 6 mm. in the disk diameter, 

 and is the only one in which 

 the primaries are invisible. The 

 others are all small, and have 

 conspicuous primaries and dis- 

 tinctly squamated interbrachial 

 ventral surfaces. The distal oral 

 papilla is not so long and spini- 

 form as in Claek's type, and 

 the oral shields are not so 

 long, but slightly longer than 

 wide. Further, in the smaller 

 specimens, they are as wide as, 

 or wider than, long. The arm 

 spines are much flattened, except 

 in the basal region of the arms, 

 and are thorny at the end, with 

 the exception of the uppermost 

 one or two. In the smaller 

 specimens, they are less flatten- 

 ed and less thorny. 



Fig. SS. Amphiura euopla. a. From above. 

 X 8. h. From below, x 8. c. Young speci- 

 men, from above, x 14. d. Side view of two 

 arm joints near disk, x 8. e. Dorsal view of 

 three arm joints near disk, x 8. /. Arm 

 spines of one side of an arm joint near disk. 

 xli. 



