FOKAMIXIFERA OF THE ATLANTIC OCEAN. 



69' 



Haplopkragmium lituolinoideum — material examined. 



Genus LITUOLA Lamarck, 1804. 



Lituola Lam.^rck, Ann. ^^UR., vol. 5, 1804, p. 243 (Type, L. nautiloidea Lamarck). 



Descnpiion. — Test crozier-sliaped, the early portion })lanospiral, 

 the later portion uncoiled and straight, test arenaceous, the chambers 

 labyrinthic with radial vertical partitions and secondary septae; 

 aperture typically of several pores. 



The original material w\as Cretaceous but the following species 

 seems to belong here unless an examination of the t}'pe species of the 

 genus may show other characters. 



It has the uncoiled test with the typical labyrmthic divisions, thus 

 meeting the requirement of the characters of the grams. 



LITUOLA MEXICANA, new species. 



Plate 14, figs. 1-4. 



Description. — Test of medium size, conical, the early portion close 

 coiled, planospiral, consisting of one or more coils and making up a 

 very small ])art of the entire test; remahider of the test uncoiled, 

 straight, linear, the chambers gradually increasing in size, the last- 

 formed one behig the largest; chambers numerous, inflated, sutures 

 distinctl}' depressed, interior labyrintliic, with radial partitions divid- 

 ing the chamber and in addition various irregular secondary j)arti- 

 tions; wall finely arenaceous with much cement; aperture uncertain, 

 with a deep reentrant circular mouth; color yellowish brown. 



Length, 3.5 mm. 



Distnbution. — Ty\)e: specimen (U.S.N.M. No. 10698) from Albatross 

 station D2399 in the Gulf of Mexico in 196 fathoms (358 meters), 

 bottom temperature 51.6° F. (10.9° C.) and not found elsewhere in tho 

 material examined. 



