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.). 



Four 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. misera, 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. 



