422 BULLETIN 100, UNITED STATES NATIONAL, MUSEUM. 



Notes. — In the largest specimen, which is from station 5187, the 

 diameter of the disk is 15 mm. ; the others are a little smaller ; all 

 are therefore of a size slightly greater than that of the two type speci- 

 mens which the Siboga. collected in the Sunda Archipelago, in which 

 the diameter of the disk was 11 mm. and 8 mm., respectively. They 

 are, however, quite identical with these last. 



The dorsal surface of the body is darker than the ventral surface ; 

 it is brownish or reddish with traces of annulations on the arms; 

 the ventral surface is grayish. 



OPHIOZONELLA BISPINOSA (Kcehler). 



Ophiozona Mspinosa Kcehleb ('96), p. 319, pi. 6, figs. 32, 33; ('99), p. 34, 



pi. 2, figs. 10, 11. 

 Ophiozonella Mspinosa Matsumoto ('15), p. 82. — H. L. Clark ('15), p. 

 340.— Matsumoto ('17), p. 294. 



Localities. — Albatross station 5420; between Cebu and Bohol; Cruz 

 Point (Bohol) bearing S. 20° E., 11.1 kilometers (6 miles) distant 

 (lat. 9° 49' 35" 1ST., long. 123° 45' 00" E.) ; 232 meters (127 fathoms) ; 

 March 25, 1909. 



Seventeen specimens (Cat. Nos. 40911, 40912, U.S.N.M.). 



Albatross station 5421; between Panay and Guimaras; Luaran 

 Point Light bearing S. 27° E., 9.26 kilometers (5 miles) distant (lat. 

 10° 33' 30" N., long. 122° 26' 00" E.) ; 251 meters (137 fathoms) ; 

 March 30, 1909 ; gn. M. 



One specimen (Cat. No. 40913, U.S.N.M.). 



Notes. — These specimens agree very well with the type which I 

 described from specimens collected by the Investigator among the 

 Andaman Islands at a depth of 205 meters (112 fathoms). The 

 diameter of the disk does not exceed 10 mm. in the largest, and it is 

 usually between 7 mm. and 9 mm. 



Matsumoto has separated from the genus Ophiozona a new genus, 

 to which he has given the name of O phiozonella, which includes the 

 deep-sea forms having sometimes one and sometimes two tentacle 

 scales. Ophiozona bispinosa must be placed in this new genus with 

 O. casta, O. depressa, and O. media, as well as with the new species 

 which I describe below. 



H. L. Clark has described ('11, p. 31, fig. 6) a species very close to 

 O. bispinosa from Japan, to which he has given the name of O. 

 elevata. According to this author the new species is distinguished 

 from O. bispinosa by its thick and elevated disk, by having the arm 

 spines shorter, and by the form of the upper arm plates. I believe 

 that there may be added, as a differential character, the form of the 

 mouth shields; in my description in 1896 and in my figure ('96, p. 

 319, pi. 6, fig. 33) I showed that the mouth shields of O. bispinosa ara 

 longer than broad, while in O. elevata they are as broad as long. I 



