REPORT ON THE FORAMINIFERA. 
53 
fessor Blitschli . 1 In both of these something more is attempted than the mere 
subdivision of the Foraminifera into Families and Sub -families. The distinctive characters 
of the constituent genera are recorded with sufficient minuteness to be of service to the 
working naturalist, and the result is in either case a tolerably complete synopsis of the 
group. The mode of treatment adopted by the two authors is, however, strikingly 
different. The long experience of Dr. Schwager, gained chiefly by the study of fossil 
types, has prompted a somewhat artificial method of dealing with the subject ; whilst 
Prof. Biitschli, from a wide general knowledge of the Protozoa, rather than a special 
or practical acquaintance with the testaceous Rhizopoda, has arrived at conclusions at 
variance in many essential points from those entertained by any previous systematist. 
It is nevertheless always of interest to the specialist to compare his results with those 
dictated by the study of larger groups ; and for this reason, if for no other, the latter 
work has a claim on our attention. 
It would occupy too much space to reproduce either of these classifications in full, and 
summaries similar to those which have been already given will serve for purposes of 
comparison better than more extended tables. 
Schwager, 1877. 
I. Foraminifera with purely calcareous perforated tests. 
II. Foraminifera with agglutinated tests. 
III. Foraminifera with purely calcareous imperforate tests. 
IY. Foraminifera with chitinous tests. 
I. Foraminifera with purely calcareous perforate tests. 
A. Chambers disposed in a single line and on one plane. 
1. Lagenoidea. 
2. Rhabdoidea. 
3. Dentalinoidea. 
(a) Dentalinidae. 
(b) Pullenidse, 
(c) Nummulitidffi. 
4. Cristellaroidea. 
B. Chambers disposed in a single line and in a spire ( Turbinoidea , Scliultze). 
5. Polymorpiiinidea. 
6. Buliminidea. 
(a) Buliminidee. 
(b) Rotalidse. 
7. Globigerinidea. 
(a) Globigerinidee. 
(b) Planorbulinidse. 
1 InBronn’s Klassen und Ordimngen des Tlner-Reichs, 1880, vol. i. (Protozoa) p. 172 et seq. 
(ZOOL. CHALL. EXP. — PART XXII. — 1884.) Y 8 
