24 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 77 



are known and these are largely confined to cold waters at compara- 

 tively shallow depths. 



Genus HALIPHYSEMA Bowerbank, 1862 

 Plate 2, fig. 9 



Test attached, with an expanded basal portion, and a columnar 

 erect portion either simple or branched ; wall arenaceous, usually with 

 numerous included sponge spicules especially near the tips of the 

 arms or the apertural end of the single chambered species ; aperture at 

 the free end of the chamber or at the ends of the branches, partially 

 obscured by the irregular clustering of spicules. 



Genus SAGENINA Chapman, 1900 



Test attached, tubular, branching; wall arenaceous; apertures 

 terminal. 



Subfamily 4. AMMODISCINAE 



Test composed of a globular proloculum and long, undivided tube, 

 closely coiled, either planospirally or in changing planes or to form a 

 spiral test ; wall of fine sand with much cement, usually of a reddish 

 or yellowish brown. 



Genus AMMOLAGENA Eimer and Fickert, 1899 

 Plate 2, fig. 10 



Test firmly attached, composed of an oval proloculum flattened on 

 the under side and a second tubular chamber of variable length but 

 of nearly uniform diameter, the open end serving as the aperture ; 

 wall finely arenaceous, the cement in excess of the sandy particles. 



Genus TOLYPAMMINA Rhumbler, 1895 

 Plate 3, fig- I 

 Test typically adherent by its undersurface, but may become free ; 

 consisting of an elongate oval proloculum and a long irregular second 

 chamber, tubular, with nearly even diameter, unbranched ; composed 

 of sand grains and a large proportion of yellowish or reddish brown 

 cement. 



Genus AMMODISCUS Reuss, 1861 

 Plate 3, fig. 2 



Test free, planospiral, composed of a globular proloculum and 

 long, undivided tubular second chamber, coiled regularly in one plane ; 



