FORAMINIFERA OF NOETH PACIFIC OCEAN. 



99 



Genus HAPLOPHRAGMOIDES, new genus. 



Description. — Test free, planospiral, composed of several coils, 

 each composed of a number of chambers, wall arenaceous, varying 

 much in texture and in the relative amount of cement in the different 

 species, aperture at the ventral border or on the lower portion of the 

 apertural face of the chamber. 



Type of the genus. — HaplopJiragmium canariense d'Orbigny. 



Included in this genus are the various completely coiled, plano- 

 spiral, arenaceous species with simple apertures which have usually 



Figs. 145-147.— Haplophbagmoides coronata. X 20 (after Brady). 145, large specimen from 

 side. 146 a, FROM side; b, APERTURAL VIEW. 147, SECTION. 



been assigned to HaplopJiragmium or Trochammina. The . type- 

 species of the former genus is an uncoiled form with multiple aper- 

 tures, and the type-species of the latter genus has a trochoid spiral 

 test. As here recognized, the species of this new genus have approxi- 

 mately an equal portion of the chambers of the test visible from the 

 two sides. I have included here both the species with an excess of 

 cement often assigned to Trochammina and those of coarser texture, 

 which have been assigned to Haplophragmium. 



HAPLOPHRAGMOIDES CORONATA (H. B. Brady). 



Trochammina coronata H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, 

 p. 58, pi. 5, fig. 15; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 340, pi. 

 40, figs. 10-12.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 281, pi. 26, fig. 3. 



Description. — Test planospiral, fairly smooth, composed of three 

 to six coils, the outer ones somewhat embracing, but all more or less 



