1891.] Recent Literature. 43 
Articulata, he will be obliged to throw out the Plathelminthes and 
Nematoid forms, while, on the other hand, his group of Vertebrates 
will disappear, along with ‘‘ Vermes ’’ (= Annelids) and Arthropods, 
in the group for which others have adopted the term Metamerata. 
These are, however, but minor points. The good features of the 
book are many, and Professor Hyatt is to be congratulated in the able 
coadjutor (or coadjutrix) he has found in Miss Arms. Many of the 
223 illustrations are fresh, but there are also some of the old acquaini- 
ances. We think the book the best of its kind yet issued, but we can- 
not help wishing that we had some really first-class text-book of ento- 
mology which would attack the subject from every side. For points 
of structure the student has still to be referred to Newport’s article 
‘« Insecta” in Todd’s ‘‘ Encyclopedia of Anatomy and Physiology,” 
while for the systematic aspect there is as yet nothing to replace Ger- 
stacker’s account in Carus and Gerstiacker’s ‘‘ Handbuch der Zoologie,”’ 
or that given in Ludwig’s edition of Leunis’s ‘‘ Synopsis.’’—J. S. K. 
