82 FORAMINIFERA 



sand grains with a large proportion of calcareous cement ; aper- 

 tures at either end just above the plane of attachment, small, 

 circular, protuberant or irregular from the line of the base. 

 Reecnt. Widely distributed, usually in cold water. 



Genus VERRUCINA Goes, 1896 

 Plate 5, figures 13, 14 



Genoholotype, Veri'ucivo, rudis Goes 

 Verrucina Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 25. 



Test attached, irregular, ovoid, interior somewhat labyrinthic ; 

 wall coarsely arenaceous ; aperture usually double, in a depressed 

 area in the middle of the dorsal side. 



Recent. Pacific ocean off coast of Mexico in 772 fathoms, 

 attached to Rhabdammina. 



FAMILY 5. HYPERAMMINIDAE 



Test free or attached, consisting of a globular proloculym and 

 a more or less elongate but not close coiled, sometimes branching, 

 portion, not divided into chambers ; wall of various agglutinated 

 materials with a basal layer of chitin. 



KEY TO THE GENERA 



I. Test free, unbranched. 



A. Elongated chamber cylindrical. 



1. Test chitinous, with a few sand grains NnbecularieUa. 



2. Test arenaceous. 



a. Test single, elongated chambers usually straight. 



Hyperarti'mina. 



b. Tests in masses, elongated chamber twisted.. .Norma nin a. 



B. Elongated chamber tapering. 



1. Coarsely arenaceous with little cement Jaculella. 



2. Very finely arenaceous with much cement Hippocrepina. 



II. Test usually attached, branching. 



A. Test dichotomously branching. 



1. Wholly attached Sagenina. 



2. Attached by proloculum only Psammatodendron. 



B. Test irregularly branching, largely raised from surface. 



1. Test cylindrical, tubes with irregular spicules Saccorhiza. 



2. Test mostly arenaceous, without spicules... Dendrophrya. 



3. Test fusiform or tapering, with many spicules, especially at 



outer end Haliphysema. 



