Vol. 31, pp. 37-38 May 16, 1918 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW UNSTALKED CRINOID FROM THE PHILIP- 

 PINE ISLANDS. 



BY AUSTIN H. CLARK. 



(Published with the permission of the Secretary of the Smithsonian Institution.) 



In the course of her investigations among the Philippine Is- 

 lands the Albatross dredged an interesting new species of the 

 genus Prometra, which may be known as 



Prometra longipinna, new species. 



The cirri have 14-15 segments of which the fourth and following are 

 about as long as broad; the cirrus length is about 4 mm. 



The arms are about 30 mm. long, resembling those of P. owsloni. 



Pj is 5 mm. long, stiff and spine-like, composed of 11-12 segments of 

 which the first is broader than long, the second one-third again as long 

 as broad, and the fourth and following two and one-half to three times 

 as long as broad ; the terminal three or four have prominently spinous 

 distal ends. P 2 is 5 mm. long with 11-12 segments, exactly resembling 

 P x . P 3 is 5 mm. long with 11 segments of which the outer are slightly 

 more elongate than those of the preceding pinnules, and the fourth and 

 following have everted and spinous distal ends. P 4 and the following 

 pinnules are 3.5 mm. long with 10 segments, smaller and weaker than the 

 preceding pinnules, though the component segments are of about the 

 same proportions ; the fourth and following have everted and spinous 

 distal ends. The distal pinnules are 4.5 mm. long with 14 segments of 

 which the third and following have slightly produced and finely spinous 

 distal ends. 



Type.— Cat. No. 35366 U. S. N. M., from Albatross Station 5356, North 

 Balabac Strait, Philippine Islands, in 58 fathoms. 



11— Proc. Biol. Soc. Wash., Vol. 31, 1918. (37) 



