18 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Albatross station 5617; Dodinga Bay, Gillolo Island, Moluccas; 

 Ternate Island (SE.) bearing S. 45° W., 12.97 kilometers (7 miles) 

 distant (lat. 0° 49' 30" N., long. 127° 25' 30" E.) ; 239 meters (131 

 fathoms) ; November 27, 1909. 



One specimen (Cat. No. E.166, U.S.N.M.). 



Albatross station 5629; Patiente Strait and southward; Doworra 

 Island (S.) bearing S. 62° W., 11.12 kilometers (6 miles) distant 

 (lat. 0° 50' 00" S., long. 128° 12' 00" E.) 375 meters (205 fathoms) ; 

 December 2, 1909; co. S. 



One specimen (Cat. No. E.164, U.S.N.M.). 



Notes. — In the specimens from station 5135 the diameter of the 

 disk is 15 mm. and the arms are from 65 mm. to 70 mm. in length; 

 in that from station 5172, which I figure, the disk is slightly smaller, 

 its diameter A T arying between 13 mm. and 14 mm., and the arms are 

 almost of the same length as in the preceding, from 60 mm. to 70 mm. 

 long. The arms are moderately rigid; they are 3 mm. broad at the 

 base and taper rapidly. The diameter of the disk of the specimen 

 from station 5629 is 15 mm.; the others are smaller. 



The disk is pentagonal, with the sides more or less concave. The 

 dorsal surface is covered with an integument which is entirely naked, 

 but beneath which, at the bases of the arms, may be distinguished the 

 radial shields, which are not much elongated, though moderately 

 broad — scarcely twice as long as broad ; these shields are covered ex- 

 teriorly by few imbricated plates which are a continuation of other 

 thicker plates which form a border about the periphery of the disk 

 in the interbrachial spaces. Usually there may be distinguished in 

 the center of each of these spaces a larger oval plate, from either side 

 of which extends a series of smaller narrow and imbricated plates. 

 In general this peripheral border of plates is very evident, but some- 

 times it is not visible in alcoholic specimens, appearing only after 

 they have been dried (pi. 2, fig. 18). 



The ventral face of the disk is covered by a smooth integument. 

 The genital slits, which are broad and elongated, reach almost to the 

 edge of the disk; they are bordered bjr large plates similarly elon- 

 gated. 



The outlines of the mouth plates can be readily made out in dried 

 individuals. The mouth shields are large and rather broad, triangu- 

 lar, with the sides and angles rounded, and a little broader than long. 

 The adoral plates, which are large and elongated, usually reach the 

 median interradial line where they are in contact, while at the same 

 time they are more or less narrowed inwardly; outwardly, on the 

 other hand, they are broadened and give off a rather narrow process 

 which separates the mouth shield from the first side arm plate. The 

 oral plates are triangular and high. The lateral mouth papillae are 



