452 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Prof. Parker lias kept before himself the wise principle that biology 
as a branch of a liberal education should familiarize the student not so 
much with the facts as with the ideas of science ; this aspect of his 
subject he has treated in a way quite novel in a text-book, but in one 
which seems to be excellent. 
Another characteristic of the book is the large space devoted to 
unicellular Animals and Plants, but the advantage of that need hardly be 
dilated on in a Microscopical Journal. Two lessons are devoted to 
Polygordius ; the selection of this worm as a type of triploblastic organi- 
zation is quite new, and events must show if it is as wise as we may hope 
it is. The distinctive characters of the higher forms of animal and 
vegetable life are dealt with much more summarily. 
Classification of Animal Kingdom.* — Prof. W. Schimkewitsch has 
proposed some changes in the classification of the Animal Kingdom. His 
scheme is as follows : — 
I. Protozoa s. Monozoa. 
H. Metazoa s. Polyzoa. 
1. Radiata 
2. Bilateria. ' 
A. Gastroneura. 
a. Accelomata 
1. Anaemaria s. Plathekninthes. 
2. Haemataria s. Nemertini. 
.'1. Nemathelminthes (Kinorhyncha, Echino- 
I rhyncha, Nematodes, Nematomorplia). 
< (Rotatoria, 
la). 
12. Trichhelminthes ^Dinophilidae). 
thonectida and 
)• 
r Inarticulata (Sipunculoidea, 
Phoronida, Bryozoa, 
Rhabdopleurida). 
y. Euccelomata .. < 
Myzostomida], Hirudinei, 
Echinoidea.) 
2. Prototracheata. 
3. Tracheata (including Arachnida). 
A. Branchiata s. Crustacea. 
B. Tetraneura s. Malacozoa. 
C. Cycloneura s. Echiuozoa. 
D. Notoneura 
The objections to some of these names are sufficiently obvious. 
Biol. Centralbl., xi. (1891) pp. 291-5. 
