OPHIURANS OF THE PHILIPPINE AND ADJACENT WATERS. 425 



are a little broader than long; in those from the Siboga collection 

 they are as long as broad, while in Lyman's type they are longer 

 than broad. The adoral plates are broader and longer, and there 

 are often two tentacle scales on the pores of the first pair. In 1904 

 I noted the presence of five lateral mouth papillae, the outermost very 

 small. In the Albatross individual this outermost mouth papilla- is 

 extremely reduced, and sometimes it is quite invisible, either be- 

 cause it is hidden under the following papilla, or because it is fused 

 with it; the second papilla is extremely broad; the three others 

 are also broad and thick, and on some sides of the mouth slits they 

 are only two in number. 



Under these conditions I believe it preferable to consider O. media 

 as an independent species. 



The Siboga specimens were collected in 1 N.-10 S. latitude and 

 123-127 E. longitude, between 918 and 1,264 meters (505 and 693 

 fathoms). 



OPHIOZONELLA MOLESTA (Koehler). 



Plate 78, figs. 3, 4 ; plate 79, figs. 5, 8, 10. 



Ophiozona molesta KCEHLEE ('04), p. 23, pi. 6, figs. 3-5. MATSUMOTO ('15), 

 p. 82; ('17), p. 294. H. L. CLARK ('15), p. 340. 



Localities. Albatross station 5114; Balayan Bay and Verde Island 

 Passage; Sombrero Island bearing N. 36 E., 13.34 kilometers (7.2 

 miles) distant (lat. 13 36' 11" N., long. 120 45' 26" E.) ; 622 

 meters (340 fathoms) ; January 20, 1908; fne. S. 



Four specimens (Cat. Nos. 40943, 40944, U.S.N.M.). 



Albatross station 5115; Balayan Bay and Verde Island Passage; 

 Sombrero Island bearing N. 49 E., 13.53 kilometers (7.3 miles) 

 distant (lat. 13 77' 11" N., long. 120 43' 40" E.) ; 622 meters (340 

 fathoms) ; January 20, 1908. 



One specimen (Cat. No. 40946, U.S.N.M.). 



Albatross station 5305; China Sea, in the vicinity of Hongkong 

 (lat. 21 54' 00" N., long. 114 46' 00" E.) ; 68 meters (37 fathoms) ; 

 October 24, 1908 ; sf t. gy. M. 



Four specimens (Cat. No. 40942, U.S.N.M.). 



Albatross station 5429; Eastern Palawan and vicinity; Fondeado 

 Island (SE.) bearing N. 18 E., 27.79 kilometers (15 miles) distant 

 (lat. 9 41' 30"N., long. 118 50' 22" E.) ; 1,401 meters (766 fathoms) ; 

 April 5, 1909 ; gn. M. 



One specimen (Cat. No. 40945, U.S.N.M.). 



Notes. I am persuaded that all these specimens belong to 0. 

 molesta, which I described in 1904 from an unique specimen collected 

 by the Siboga, although this last had only two arm spines, while three 

 is the normal number in the Albatross- specimens. But my type was 

 of very small size, as the diameter of the disk did not exceed 6 mm. 



