156 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



POLYMORPHINA EXTENSA, new name. 



Plate 41, figs. 7, 8. 



Polymorphina longicollis H. B. Brady (not Karrer), Quart. Journ. Micr. 

 Sei., vol. 21, 1881, p. 64 ; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 

 572, pi. 73, figs. 18, 19. — Egger, Abh. kon. bay. Akad. Wiss. Miinchen, 

 CI. II, vol. 18, 1893, p. 310, pi. 9, fig. 21 [?]— Chapman, Journ. 

 Linn. Soc. Zool., vol. 30, 1910, p. 414.— Cushman, Bull. 71, U. S. Nat. 

 Mus., pt. 3, 1913, p. 90, pi. 41, figs. 1-3. 



Description. — Test elongate, fusiform, outline not lobulate, initial 

 end more or less pointed, apertural end produced into an elongate 

 cylindrical neck; chambers few, slightly inflated; sutures fairly dis- 

 tinct, but not depressed, except in the case of the last-formed one; 

 wall more or less hispid, last chamber especially more inflated and 

 more spinose. 



Length up to 0.60 mm. 



Distribution. — Brady records this species from three stations in 

 the North Atlantic, 1,125, 1,476, and 2,435 fathoms (2,057, 2,699, and 

 4,454 meters), and "the best examples of the species" occurring in 

 the South Atlantic at Challenger station 338, in 1,990 fathoms (3,640 

 meters). Therefore it seems probable that his figured specimens 

 came from that station. He also gives four stations in the South 

 Pacific, 1,375, 1,825, 2,075, and 2,425 fathoms (2,515, 3,338, 3,795, 

 and 4,436 meters). Egger recorded a specimen from off Mauritius in 

 411 meters (225 fathoms). His figure is poor, and it may not be the 

 same. Chapman records it from off Funafuti, 2,195-2,715 fathoms 

 (4,010-4,965 meters). I had material from the North Pacific which 

 I referred to this species, from off the Hawaiian Islands, in 1,670 

 fathoms (3,054 meters), and between Guam and Japan, in 1884 and 

 2,167 fathoms (3,446 and 3,963 meters). All the records for this 

 species therefore are in deep water. The two Albatross stations in 

 the Atlantic at which I have had specimens of this species, are in 

 1,362 and 1,395 fathoms (2,491 and 2,552 meters), agreeing with the 

 previous findings in their general depths. These are off the north- 

 eastern coast of the United States. 



