24 BULLETIN 104, UN^ITED STATES NATIONAL MUSEUM. 



REOPHAX HISPIDULUS, new species. 



Plate 5, fig. 7. 



Description. — Test elongate, com{)ose(l of pyriform, flask-shaped 

 chambers, widest at the broadly rounded, somewhat truncate base> 

 apertiiral end extended, gradually taoering to a slender cylindrical 

 neck; wall composed of line amorphous material with a large 

 amount of fine sponge sj^icule^, for the most part irregularly arranged, 

 but toward the base of the chamber extending directly backward, 

 especially about the periphery; aperture a small circular opening at 

 the end of a long slender cylindrical neck; color light gray. 



Length 3 mm. or more. 



Distributioii.—Type specimen (U.S.N.M. No. 10670) from D2677 

 off the southeastern Atlantic coast of the United States, latitude, 32° 

 39' N.; longitude 76° 50' 30" W., in 478 fathoms, (873 meters) bot- 

 tom temperature 39.3° F. (3.9°C.) 



This seetos ^o be distinct from other spicular forms of the genus. 

 The fine amorphous material with the fine spicules is not unlike the 

 texture of CritJiionina insum Goes, var. Jiispida Flint. 



REOPHAX CYLINDRICUS H. B. Brady. 



Plate 5, fig. 8. 



Reophax cylindricus H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 299, pi. 32, figs. 7-9.— Egger, Abh. Bay. Akad. Wiss. Miinchen, vol. 18, 

 1893, p. 257, pi. 4, fig. 37 (?).— Flint, Rep. U. S. Nat. Mus., 1S97 (1899), p. 

 274, pi. 18, fig. 6.— CusiiMAN, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 91, 

 figs. 129-131. 



Description. — Test elongate, subcylindrical, slightly tapering, the 

 last-formed chamber being of the greatest width, initial end broadly 

 rounded, apertural end tapering with a very short truncate neck and 

 rounded aperture; wall of fine sand grains of uniform size, neatly and 

 firmly cemented, the outer wall smooth; color a yellowish or reddish 

 brown slightly banded, chambers hardly distinguishable from the 

 exterior except by difi'erences in color or by slight constrictions, in 

 section separated by very thick transverse walls. 



Length up to 5 mm. 



Distribution. — The type specimens of this species were from a 

 station of the Valorous southwest of Greenland, latitude 59° 10' N.; 

 longitude 50"^ 25' W., in 1,750 fathoms (3,200 meters). Flint had a 

 single, specimen from Albatross station D2508 in 1,781 fathoms (3,274 

 meters) off the northeastern coast of the LTnited States. I have 

 specimens, very typical in character from five stations nearby as 

 noted in the list. It never seems to be common but holds its char- 

 acters most fixedly. 



The one Pacific record has a question mark in the Challenger work 

 and but a fragment was recorded in the Southern Ocean. Egger's 



