280 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



periproctal plates, but continuing a little way on to the interambu- 

 lacra, where the green is located mainly at the upper and lower edge 

 of the areoles. The ocular plates and the ambulacra are white. A 

 very conspicuous feature of the Albatross specimen is the dark brown- 

 ish color of the tube feet, which makes them appear as very distinct 

 radiating lines, especially on the peristome and the oral side of the 

 test. In the Challenger specimen this coloration is much less con- 

 spicuous, probably faded; in one of those in the British Museum it 

 is, however, quite distinct. 



Occurrence. — The only other locality from which the species is 

 known, is lat. 12° 43' N., long. 122° 10' E., 100-115 fathoms {Chal- 

 lenger station 204), very close to the place where it was found by the 

 Albatross. 



Remarks. — It is evident that this species is very closely related to 

 assimilis from the Kei Islands. In fact, were it not that the pedi- 

 cellariae are so conspicuously different, I would consider them to be 

 one and the same species, the other differences, the less strongly spiny 

 primaries, the much more closely tuberculated interporiferous zone 

 of the ambulacra, and the color, being scarcely more than might well 

 be supposed to be within the range of variation of a single species. 

 However, judging from the material available, the differences are 

 real, and quite conspicuous; it is, therefore, at least for the present 

 necessary to regard them as distinct species. Should they ultimately 

 prove to be identical (which I do not expect they will) the name ser- 

 rata, as the first of the two, is the one to be retained. 



SCHIZOCIDARIS FASCIATA, new species 



Plate 61, fig. 3; plate 74, fig. 3; plate 78, fig. 2 



Locality. — Station 5547; near Jolo (Sulu) ; Noble Point, Tulayan 

 Island (E.) bearing S. 38° E., 9.5 miles distant (lat. 6° 09' 20" N., 

 long. 121° 13' 40" E.); 283 meters; bottom temperature 13.50° C; 

 fine sand; September 15, 1909 (1 specimen, the type, Cat. No. E. 



1387,U.S.N.M.). 



Measurements 



Description. — The test is low, flattened above and below, with the 

 sides arched; the circumference is circular. 



