FORAMINIFERA OF THE ATLANTIC OCEAN. 



37 



It soems rather difficult to (listin<2;uish botwoon this s])ocios and tho 

 earl}' chambers of Lituotnha IHuiformis. Tliere are also two forms 

 both of which are figured by Brady in the Challenger Report. Fig- 

 ures 1 and 2 of plate 40 in that re|)()rt show specimens more or less 

 irregularly coiled in the early portion and the chambers much longer 

 than wide. Figure 3 of the same plate shows a form in which the 

 chaml)(M"s are of nearly ecpial size, about as long as wide and the whole 

 test i)lanospiral. Such specimens occurred at D23S3 in tho (ailf of 

 Mexico but were not obtained elsewhere, the others all being of tho 

 irregular form first noted. 



Trochamnt inuidcs proteus — material examined. 



Localitj'. 



20 55 48 N. 

 28 32 00 N. 

 28 43 00 N. 

 28 38 30 N 



86 27 on W.. 

 88 06 00 W.. 



87 14 SOW.. 

 87 02 00 W. 



44 23 30 N.; 61 44 15 W. 

 17 46 30 N.: 65 10 25 W. 



14 20 30 N.; 63 10 00 W. 



Depth 

 in 



fath- 

 oms. 



'F. 



399 

 1,181 



525 

 420 

 93 



1,4S2 



821 



Bot- 

 tom 

 tem- 

 pei'a- 

 ture. 



39.8 

 41.1 

 41.8 

 42.3 



Character of 

 bottom. - 



yl. oz 



br. gn. m 

 it. gy.m.. 



gn. m I Rare 



dk. Lr.m ! Rare 



Abundance. 



Rare. 

 Rare. 

 Rare. 



crs. CO. s. brk. 



sh. for. 

 CO. s. sh. for . . 



Rare. 

 Rare. 



Genus HAPLOPHRAGMOIDES Cushman, 1910. 



HaplophragmoUles Cushman, Bull. 71, U. S. Nat. Mus., pt. 1, 1910, p. 99 (Type 

 Haplophragmiian canariense (d'Orbigny)). 



Description. — Test free, planospiral, com]>osed of several coils, each 

 composed of a number of chamliers, wall arenaceous, varying much 

 in texture and in the relative amount of cement in the different species, 

 aperture at tho ventral border or on the lower portion of the aper- 

 tural face of the chamber. 



Included in this genus are tho various completely coiled, ])lano- 

 spiral, arenaceous species with simple apertures which have usually 

 been assigned to Ha plophragmiurn or Trocliammina . The typo 

 species of the former genus is an uncoiled form with multi{)le aper- 

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

 test. As here recognized, tho s};ecies of Haplophragm aides have 

 approximately an equal portion of chambers of the test visible from 

 the two sides. Included here are both the sj^ecies with an excess of 

 cement often placed in Troclmmmina and those of coarser texture, 

 which have been assigned to Ildjdapliragntiwn. 



