22 Proceedings of the Biological Society of Washington. 



The pinnules are essentially similar to those of 0. adeonce; Pi 13 mm. 

 long, rather stout, stiff, tapering evenly from the base to the tip, com- 

 posed of fifteen segments, all but the first of which are longer than broad, 

 the outer being about twice as long as broad; P2 similar to Pi, 16 mm. 

 long, but proportionately stouter and tapering more gradually, composed 

 of fifteen or sixteen segments, of which the first is broader than long, the 

 second is about as long as broad, and the following are longer than broad, 

 mostly about twice as long as broad; P 3 similar to P2 and of the same 

 length or very slightly shorter, composed of fourteen or fifteen segments; 

 P 4 similar to P 3 , 12 mm. long with fourteen segments; following pinnules 

 shorter and more flexible, with shorter segments; P B is 9 mm. long with 

 twelve segments; distal pinnules slender, 13 mm. long with twenty-two 

 segments. 



Localities. — Southwest of Sorsogon Bay, Luzon. Philippine Islands 

 9-40 fathoms; cable repair ship "Rizal" (A. S. Day) September, 1912 

 (the-type-specimen, Cat. No. 705 M. C. Z.). Port Galera, Mindoro, 

 April-June 1912; L. E. Griffin (Cat. No. 706 M. C. Z.). 



