THE FAMILY ASTEOEHIZID.E • 127 



Genus BJtizamviiiia, Beady. 



Unattached masses of fine flexible, simple or 

 branching, chitino-arenaceous tubes ; more or less 

 rough externall}'. GauU. Becei/f. 



Example. — B. algcpformis, Brad}-, ' Quart. Journ. 

 Micr. Sci.' vol. xix. N.S. 1879, p. 39, pi. iv. figs. 16, 17. 



This form is seen under a variety of aspects, 

 according to the nature of the sea bottom. Some- 

 times it is merely a branched flexible tube, roughened 

 externally by adherent mud or fine sand, at others 

 thickly encrusted with minute objects, as other 

 Foraminifera, which the organism has selected froin 

 the surrounding ooze. It is a deep-water species. 

 Becent. (Plate 6, figs. J, K.) 



Genus Sage?iina, Chapman. 



Test a branching, reticulated, adherent, sandy 

 tube, spread over the surface of shells or stones ; 

 apertures terminal. 



The name Sagenella^ given by H. B. Brady for 

 this generic type, had been alread}' used for a genus 

 of the polyzoa b}- James Hall. The above definition 

 of the genus naturall}' still holds good for these 

 types. Becent. 



Example. — ScKjenina firjiuh.'^cens, Brady sp., 

 'Quart. Journ. Micr. Sci.' vol. xix. N.S. 1879, p. 41, 

 pi. V. fig. 1. 



This peculiar branching form is especially re- 

 stricted, in its distribution, to the shallow water of 

 coral regions in the S. Pacific. Its ramifying test is 



