30 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



MARSIPELLA CYLINDRICA H. B. Brady. 



Marsipella cylindrica H. B. Brady, Proc. Roy. Soc. Edinburgh, vol. 11, 1882, 

 p. 714; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 265, pi. 24, figs. 20-22 — 

 Rhumbler, Arch. Protistk., vol. 3, 1903, p. 265, fig. 109 (in text). 



Description. — Test tubular, slender, of nearly uniform diameter, 

 ends of the tube open and serving as apertures, wall composed 

 almost entirely of acicular sponge spicules, sometimes entire but 



usually in fragments, laid side by side, 

 lengthwise of the test, and strongly 

 cemented. 



Length up to 7 mm.; diameter 0.12— 

 0.25 mm. 



Distribution. — As this genus has been 

 recorded but once previously from the 

 North Pacific, it is interesting to find it 

 at four stations, but in small numbers. 

 It has occurred off the Hawaiian Islands, 

 Albatross station H3009, in 603 fathoms, 

 rare. The other three stations are about 

 Japan. They are, Nero station 1225, in 

 805 fathoms, south of Yokohama; Alba- 

 tross stations D4957, in 437 fathoms, off 

 the eastern coast of Kiushu Island, and 

 D4900, in 139 fathoms, southwest of 

 Nagasaki. The Challenger obtained it 

 at station 237, in 1,875 fathoms, east of 

 Japan. 



The tubes are often tinged with a red- 

 dish-brown color as though the cement 

 might contain ferruginous material. The 

 wall is comparatively thin, but may be 

 composed of several layers of spicules. 



Genus BATHYSIPHON G. O. 

 Sars, 1871. 



Figs. 15-16.— Marsipella cylindrica. 

 x 30. 15, straight test composed 

 largely of long unbroken spicules. 

 16, rougher, doubly curved test 

 largely made up of fragmentary 

 portions of spicules. 



Bathy siphon G. O. Sars (M. Sars, in MS.) 



(type, B. filiformis G. O. Sars) Forh. 



Vid. Selsk. Christiania, 1871 (1872), p. 



251.— Norman, Rep. Brit. Ass., 1880, 



pp. 389-390.— H. B. Brady, Rep. Voy. 



Challenger, Zoology, vol. 9, 1884, p. 248.— de Folin, Act. Soc. Linn. 



Bordeaux, vol. 40, 1886, p. 273.— Rhumbler, Arch. Protistk., vol. 3, 1903, 



p. 269. 



Description. — Test free, cylindrical, sometimes tapering toward one 



end, straight or somewhat curved, often externally constricted, but 



without corresponding divisions of the tubular chamber internally, 



wall composed of sponge spicules overlaid by a varying thickness of 



