DESCRIPTIVE CATALOGUE OF RECENT FORAMINIFERA. 259 



Family II. ASTRORHIZIDJE. 



Walls thick, composed of sand or mud, slightly cemented. . Subfamily ASTRORHIZIN.E. 

 Fusiform, branching, or flattened with angular or radiate margin; aperture at 



the end of each ray or branch Genus Aatrorhiza. 



More or less flask shaped or subcylindrical; aperture single, terminal: 



Genus Pelosina. 



Subglobular, very irregular externally; apertures numerous, in horn-like pro- 

 tuberances Genus Storthosphcera. 



Columnar, branching, or irregularly outspread; adherent; apertures terminal: 



Genus Dendrophrya. 

 A rounded mass of radiating, branching tubes arranged in more or less distinct 



layers Genus Syrinf/ammina. 



Walls thick, composed of felted sponge spicules and fine sand, uncemented: 



Subfamily PILULININTE. 



Spherical ; aperture a long, curved slit Genus Pilulina. 



Subspherical, labyrinthic or cavernous, or having a central undivided cavity with 



subcavernous walls ; no general aperture Genus Crithionina. 



Oval or subcylindrical; aperture typically a rounded orifice at one end: 



Genus Techiiitella. 



Cylindrical, long, slightly tapering, open at both ends Genus Bathysiphon. 



Walls thin, composed of sand grains firmly cemented; test nearly spherical: 



Subfamily SACCAMMININ^E. 



A single globular chamber, without general aperture Genus Psammospluvra. 



A number of adherent globular chambers, without general aperture: 



Genus Sorosphwra. 

 One or several globular, pyriform or fusiform chambers, with or without tubular 



connection ; apertures distinct Genus Saccammina. 



Walls composed of firmly cemented sand grains, often mixed with sponge spicules; 

 test tubular, sometimes imperfectly segmented. .Subfamily RIIABDAMMININ^E. 



Elongate, tapering, simple; aperture at the broad end Genus Jaculella. 



Elongate, cylindrical, simple or branched; aperture at one end, the other end 



rounded, sometimes inflated Genus Jlyperammina. 



Fusiform or cylindrical, largely composed of sponge spicules; aperture at each 



end Genus Harsipella. 



Rectilinear, radiate or branching, with or without a central chamber; apertures 



at the open ends of the tubes Genus Rhabdammina. 



Very variable, usually consisting of irregular inflated sacs, single or united; 



apertures multiple, tubulated Genus Aschcmonella. 



Tubular, slender, flexible, simple or branched, chitino-arenaceous, in nouadher- 



ent masses Genus llhizammina. 



Tubular, branching, reticulated, adherent to the surface of shells or stones; 



apertures terminal Genus Sayenella. 



Subcylindrical, adherent at one end, rounded at the other, constructed of loose 



sand grains ; imperfectly septate Genus BotelUna. 



Columnar, straight or crooked, adherent by an expanded base, enlarging or 



branching toward the apex; aperture terminal Genus Naliphysema. 



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Family III. LITUOLIDTE. 



Test composed of coarse sand grains, rough externally Subfamily LITUOLESLE. 



Not labyrinthic. 

 Test free. 



Chambers one, or several united in a straight, curved, or irregular line, 



never spiral Genus Lleophax. 



Chambers numerous, partly or entirely spiral... Genus Haplophraymwm. 



