26 SMITHSONIAN MISCELLANEOUS COLLECTIONS N'OL. 



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Subfamily 2. REOPHACINAE 



Test composed of agglutinated material, sand grains, sponge 

 spicules, tests of other foraminifera, etc., with a varying amount of 

 cement ; chambers in a linear series ; aperture usually single and at the 

 distal end of the chamber but occasionally at the side, rarely multiple 

 or cribrate. 



Genus REOPHAX Montfort, 1808 



Plate 3, fig. 4 



Test free, composed of chambers in a linear series, usually joined 

 end to end in a straight or slightly curved line, ranging from closely 

 overlapping chambers to remotely separated ones v\^ith stoloniferous 

 connections between ; chambers few or numerous ; wall of sand grains, 

 mica scales, sponge spicules, chitinous or of tests of other foraminif- 

 era; chambers undivided, aperture simple, terminal, at the distal end 

 of the last-formed chamber. 



Genus HORMOSINA H. B. Brady, 1879 



Plate 3, fig. 5 



Test free, composed of a linear series of subglobular, fusiform, or 

 pyriform chambers joined end to end in a single moniliform series, 

 straight, somewhat curved or irregular ; walls usually thin, finely 

 arenaceous with an excess of cement ; chambers undivided ; aperture 

 a single circular opening usually at the dorsal end of the last-formed 

 chamber, often with a neck, but occasionally at the side of the 

 chamber ; color yellowish or reddish brown. 



Genus HAPLOSTICHE Reuss, 1861 

 Plate 3, fig. 6 



Test free, cylindrical or tapering, composed of a linear series of 

 chambers, interior labyrinthic ; walls thick, coarsely arenaceous, but 

 usually fairly smooth on the exterior ; aperture terminal in the middle 

 of the distal portion of the last-formed chamber, in the earlier cham- 

 bers usually simple, in the adult made up of several pores or in large 

 specimens often dendritic, occasionally with a short neck. 



Subfamily 3. TROCHAMMININAE 



Test composed of several chambers, either in a planospiral coil, 

 trochoid, or otherwise arranged; wall composed of sand grains of 

 varying degrees of coarseness cemented with a calcareous or fer- 

 ruginous cement, free or attached. 



