114 THE FOEAMINIFERA 



8uh-faniihj 1. Astkoehizin.e. 



Walls thick, composed of loose sand or mud, very 

 slightly cemented. 



Genus Astrorlii^a, Sandahl. 



Test fusiform or depressed ; in the latter case 

 either sublenticular, with angular or irregularly 

 radiate margin, or in branching masses. Apertures 

 terminal in each ray or branch. Recent. 



Example.— ^4. arenaria, Norman, ' Proc. Boy. 

 Soc' vol. XXV. 1876, p. 213; Brady, ' Kep. " Chall." ' 

 vol. ix. 1884, p. 232, pi. xix. tigs. 5-10. 



This is a deep-water form, being seldom found in 

 less than 150 fathoms, and usually nuich more. It 

 is almost essentially a North Atlantic species. 

 Norman obtained it from Norway, Goes from Spitz- 

 bergen, and Brady from the Cape of Good Hope (a 

 single example). Beceiit. (Plate 5, tig. A.) 



Genus Fel(»;uui, Bi!ai)Y. 



Test formed of mud, with a chitinous lining ; 

 more or less flask-shaped or subcylindrical. Becent. 



Example. — P. rotundata, Brady, 'Quart. Journ. 

 Micr. 8ci.' vol. xix. 1879, p. 31, pi. iii. tigs. 4 and 5. 



The walls of this species are very thick and com- 

 posed of soft mud or ooze. Its range in depth 

 appears to be from 640 to 2,050 fathoms. Becent. 

 (Plate 5, fig. B.) 



