166 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Albatross station 5371; Marinduque Island and vicinity; Tayabas 

 Light (outer) bearing N. 43° W., 11.1 kilometers (6 miles) distant 

 (lat. 13° 49' 40" N., long. 121° 40' 15" E.) ; 152 meters (83 fathoms) ; 

 February 24, 1909; gn. M. (m. b.). 



Pour specimens (Cat. Nos. 41159, 41301, U.S.N.M.). 



Albatross station 5537; between Negros and Siquijor; Apo Island 

 (C.) bearing S. 46° W., 16.12 kilometers (8.7 miles) distant (lat. 9° 

 11' 00" N., long. 123° 23' 00" E.) ; 464 meters (254 fathoms) ; August 

 19, 1909 ; gn. M. 



One specimen (Cat. No. 41303, U.S.N.M.). 



Hakodate, Japan. 



One specimen (Cat. No. 41305, U.S.N.M.). 



Nan Wan, Formosa (Taiwan). 



One specimen (Cat. No. 41304, U.S.N.M.). 



Notes. — The specimens from station 5371 are of large size; the 

 diameter of the disk reaches 7 mm., and the arms exceed 50 mm. in 

 length; the others are much smaller. 



I notice some variations in the form of the mouth shields; these 

 are triangular and rather narrow and a little longer than broad in 

 the specimen from Hakodate (pi. 70, fig. 8) and in those from station 

 5100 ; they are triangular and very much broadened, as long as broad, 

 or even a little broader than long, in the specimen from station 5537 

 (fig. 5) ; in the two from station 5371 they are lozenge-shaped (fig. 

 6). The plates of the dorsal surface of the disk are largest in the 

 specimen from station 5537, and in this a large dorsocentral with 

 five primary radials, though only slightly evident, may be made out 

 (fig. 4), while in that from Hakodate all the plates are small and 

 equal; in those from station 5371, which are larger, the primary 

 rosette is fairly distinct, and the five radials are smaller than the 

 dorsocentral (fig. 7) ; this primary rosette is also recognizable in the 

 individual from station 5100. 



It is to be noticed that the different specimens mentioned above 

 come from somewhat different depths; that from station 5371 was 

 captured at 152 meters (83 fathoms), that from station 5537 at 464 

 meters (254 fathoms), and that from station 5100 at 64 meters (35 

 fathoms) ; the depth of the habitat of the individuals from Hako- 

 date and from Formosa is not mentioned. 



The variations which I have just noted are of secondary signifi- 

 cance, and we are undoubtedly dealing with the same species, of 

 which the essential characters as a whole conform with those which 

 I have described in the type of A. miser a, which was captured by 

 the Investigator among the Andaman Islands at a depth of 485 

 meter (265 fathoms) and which was only represented by a single 

 specimen, in which the diameter of the disk did not exceed 4 mm. 



