ANATOMY AND PHYSIOLOGY, CLASSIFICATION. Prot. 11 
field is thereby opened out for the study of the physiology of these and 
other Protozoa , as well as of Rotifers, &c. 
Castellarnau (14) has collected, from various sources, the most ap¬ 
proved methods of investigating living and dead Protozoa , and gives 
directions for mounting the same. 
Pfitzner (73) describes how best to observe the karyokinetic nuclear 
division in Opalina ranarum. 
Classification. 
Lankester (59) has done on a small scale for English readers what 
Biitschli (10) is doing for those who read German, and, in the compass of 
a comparatively short article, has given a luminous account of the affini¬ 
ties, morphology, physiology, and taxonomy of the Protozoa. The follow¬ 
ing scheme of classification is adopted : — 
Sections. 
Protean a . 
Plasmodiata 
Lobosa . . 
Filosa 
PROTOZOA. 
Grade a. GYMNOMYXIA. 
( Class i. Proteomyxa. 
’ ( Ex., Vampyrella, Protomyxa , Archerina. 
( Class ii. Mycetozoa. 
’ { Ex., The Eu-Mycetozoa of Zopf. 
Class hi. Lobosa. 
Ex., Amoeba, Arcella ) Pelomyxa. 
Class iy. Labyrinthulidea. 
Ex., Labyrinthula , Chlamydomyxa. 
Class v. Heliozoa. 
Ex,, Actinophrys , PapJtidiophrys , Clathrulina. 
Class yi. Reticularia. 
Ex., Gromia, Lituola , Astrorhiza , Globigerina. 
Class vii. Radiolaria. 
Ex., Thalassicolla, Eucyrtidium, Acanthometra. 
{ 
Lipostoma 
I 
Stomatophora s 
Grade b. COPTIC AT A. 
Class i. Sporozoa. 
Ex., Gregarina , Coccidium. 
f Class ii. Flagellata. 
Ex., Monas , Salpingoeca, Euglena, Yohox. 
Class in. Dinoflagellata. 
Ex., Prorocentrum, Ceratium. 
Class iy. Rhynciioflagellata. 
Ex., Noctiluca. 
Class Y. Ciliata. 
Ex., Vortlcella, Paramecium , Slentor. 
Class iy. Acinetaria. 
Ex , Acineta, Dendrosoma , 
