86 BULLETIN 104, UNITED STATES NATIONAL, MUSEUM 



various times he has passed several entire dredgings from this station through a 

 fine sieve immediately after they were taken. The shells were often seen in a 

 practically complete condition in the sieve, but invariably separated into frag- 

 ments similar to those figured, either by their own weight when deprived of the 

 supporting ooze, or as soon as an attempt was made to raise them with a brush. 

 There can be no doubt that the organism when undisturbed is capable of rami- 

 fying and spreading over the surface of the ooze and that it may attain a very 

 much greater size than any of the separate fragments recovered. The proto- 

 plasm is abundant and of a dark olive tint. 



In addition to the region of the British Isles, the species is recorded 

 by the authors from the Antarctic. 



Genus HEMIGORDIUS Schubert, 1908. 



Hemigordius Schubert (Genoholotype, Cornuspira schlumbergeri Howchin) , 

 Jahrb. k. k. Geol. Reichs., vol. 58, 1908, p. 381. — Cushman, Special PubL 

 No. 1, Cushman Lab. Foram. Res., 1928, p. 161. 



Cormispira Howchin (not Schlutze) Trans. Roy. Soc. South Australia, vol. 

 19, 1895, p. 195. 



Test in the early coils not entirely planispiral, later ones plani- 

 spiral and completely involute but test not umbonate; wall appar- 

 ently calcareous, somewhat laminated. 



Carboniferous. Australia, Japan, and America. 



This is a development from the early forms of this family in which 

 the early coils are not planispiral but become so later. The coils are 

 involute in the adult. Such forms apparently become extinct in the 



Genus VIDALINA Schlumberger, 1899 



yidaZina ScHLUMBERGER (Genoholotype, Vidalina hispanica Schlumberger), 

 Bull. Soc. G6ol. France, ser. 3, vol. 27, 1899, p. 459. — Cushman, Special 

 Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 162 



Test similar to Cornuspira, but completely involute, the umbonal 

 region thickened. 



Cretaceous. 



This large form with its involute character is in some respects a 

 parallelism with Hemigordius of the Palaeozoic, but the early devel- 

 opment is not the same nor the character of the double wall which 

 is developed in Vidalina, each coil building a floor on the preceding 

 one. This development in Vidalina is a specialized one, and the genus 

 became extinct in the Cretaceous. 



Subfamily 2. NoDOBACULARiiNAE 



Early portion as in Cornuspira, followed by chambers in a recti- 

 linear series. 



Genus NODOBACULARIA Rhumbler, 1895 



Nodobacularia Rhumbler (Genoholotype, Nubecularia tibia Jones and 

 Parker), Nachr. Ges. Wiss. Gottingen, 1895, p. 87. — Cushman, Special 

 Publ. No. 1, Cushman Lab. Foram. Res., 1928, p. 164. 



Nubecularia (part) Jones and Parker (not Defrance), Quart. Journ. Geol. 

 Soc, vol. 16, 1860, p. 455. 



