138 rORAMlNlFERA OF THE CRAG. 



II. ARENACEA. 



Oeneral Gharadevs. — Shells made of sand-grains and other materials, 

 agglutinated together by ferruginous, calcareous, chitinoiis, or siliceous cement; 

 some, such as Textilaria and Bulimina, are hyaline, and others porcellaneous or 

 chitinous, in an early stage. Many are sandy isomorphs of porcellaneous and 

 hyaline types. 



Family 1.— LITUOLID^. 



General Characters. — Of the Lituolidse there are few representatives among the 

 Foraminifera collected from the Crag. In this family the test is arenaceous, 

 usually regular in contour. The septation of the jJolythalamous forms is often 

 imperfect ; chambers often labyrinthic 



Sub-family 1. — LiTUOLiNiE. 



General Characters. — Test made of coarse sand-grains ; rough externally, 

 often labyrinthic internally. 



Genus 1. — Haplophragmium, Beuss, 1860. 



Brady, Beyort ' Challenger,'' pp. 65 and 300. 



General Characters. — Test free ; made of coarse sand-grains ; partly or entirely 

 spiral ; nautiloid or crozier-shaped ; chambers simple. 



1. Haplophragmium glomeratum {Brady). Plate V, fig. 12. 



LiTUOLA GLOMERATA, Brady, 1878. Ann. Mag. N. H., ser. 5, vol. i, p. 433, pi. xx, 



fig. 1. 

 HAFLOPHRAGMirM GLOMERATUM, Wright, 1881. Proc. Belfast Nat. H. Club, 



Append., pi. viii, fig. 1. 

 — — Brady, 18S2. Denks. k. Akad. "Wien, vol. xliii, 



p. 100. 



