12 



BULLETIN 104^ UNITED STATES NATIONAL MUSEUM. 



diameter, contracted; wall thick, composed of line sand grains, loosely 

 cemented and friable at the surface, more firmly cemented on the 

 interior, occasionally with a larger pebble at one side or irregularly 

 placed or with other foreign bodies: apertures formed by the open 

 ends of the tubular chambers, often more or less closed by fine sand 

 grains. 



Length, up to 10 mm. 



Distribution. — In general this is a species of cold waters. It is 

 known from the coast of Norway (M. and G. O. Sars), Kars Fjord, 

 180 fathoms (Norman); Faroe Channel, 530-650 fathoms (Carpen- 

 ter, Brady), off the Cape of Good Hope (Challenger, Brady); Arctic 

 Sea, off Spitzbergen (Goes), Arctic Ocean (Eaaer), from three Alba- 

 tross stations D2570 off Georges Bank, D2586 off Long Island, and 

 2723 off Chesapeake Bay, 328-1,813 fathoms (Flint), North Pacific 

 (Cushman), and from the Antarctic, 1,775-2,500 fathoms (Pearcey). 



In the Atlantic material I have had the species has occurred at 

 about 20 stations, aU northward from Cape Hatteras and ranging 

 northward nearly to the Grand Banks. The depths range from 384 

 to 2,045 fathoms and the bottom temperatures from 36.8° to 41° F. 



Astrorhiza crassatiaa —material examined. 



.\STRORHIZA GRANULOSA (H. B. Brady.) 



Plate 5, fig. 4. 



Marsipella (jvanulosa H. B. Buady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 36, 

 pi. 3, figs. 8, 9.— BuTSCHLi, in Bronn's Klasson und Ordnungen des Thier- 

 reichs, vol. 1, 1S80, p. 194, pi. 5, fig. 9. 



Astrorhiza granulosa 11. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 48; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 234, pi. 20, figs. 14-23.— 

 Xext.mayr. Stamine Thierreichs. vol. 1, 1889, p. 173. fig. l7d.—GoES, Bull. 



