NOTES ON RETICULARIAN RHIZOPODA. 31 
Nores on some of the Rericunartan Rutzopopa of the 
“ CHALLENGER ” Exprepirion. By Henry B. Brapy, 
F.R.S. 
Part III. 
1. Classification, 
2. Further Notes on New Species. 
3. Note on Biloculina Mud. 
In two previous papers (‘ Quart. Journ. Micr. Sci.,’ Jan. 
and April, 1879) I have endeavoured to indicate some of 
the more important results that have been obtained by the 
examination of the material obtained by dredge and tow-net 
during the “ Challenger ” expedition, in respect of the large 
and varied group of testaceous Rhizopoda, which it is the 
custom to speak of under the general term Foraminifera or 
Reticularia. These preliminary papers have been princi- 
pally devoted to the description of types, previously un- 
known, or at any rate little understood, presenting features 
of interest from a morphological stand-point. I propose to 
devote the present contribution chiefly to the consideration 
of questions connected with the classification of the group, 
supplementing what I have to say on this point by brief 
descriptions of a further instalment of new species, and a 
note on certain deposits, now in course of formation, in which 
the porcellanous group of Rhizopoda plays the most impor- 
tant part. 
1. Classification. 
Of the primary subdivision of the Class Ru1zopopa it is 
no part of my present purpose to speak ; I intend rather to 
confine my observations to the Order to which my attention 
has been of late more particularly directed, and the sub- 
ordinate groups into which its constituent organisms may 
best be arranged. 
The term Foraminiferes was originally employed by 
d’Orbigny in his scheme for the classification of the Mol- 
lusca, at a time when the Foraminifera, or at least a 
considerable section of them, were regarded as microscopic 
Cephalopods. In his “Tableau Méthodique,’” the Class 
* « Annales des Sciences Naturelles,’ 1826, vol. vii, p. 245. 
“ T1le Ordre.—Foraminirbres, Nob. ; Asiphonoides, de Haan. 
“* Charact. essent.—Un test polythalame totalement interne; derniére 
cloison terminale; point de siphon, mais seulement une ow plusieurs 
ouvertures donnant communication d’une loge 4 ’autre.” 
