282 Recent Literature. [ April, 
This volume will admirably supplement the series of memoirs in 
course of publication on the marine zodlogy of Alaska by Mr. 
all, who has made very extensive collections on the coast of 
aska, 
BARRANDE’S BrAcHIOPODS OF BonEmMIA.'\—This volume of ex- 
tracts from the fifth of the magnificent series of the Systéme Silu- 
rien du Centre de la Bohême, is of very general interest to palzeon- 
tological students, since it gives the results of the author’s studies 
upon an interesting series of faunz, where the succession is quite 
complete ; and although the distinguished author is quite fully 
persuaded that his facts and inductions are opposed to the theory 
of descent, others who favor the theory find these profound works 
rich in facts and inferences which go to strengthen their own 
views; so anything that comes from the paleontological work- 
shop at Prague—and least of all are they mere chips—is always 
welcomed. 
It will be seen how useful to the general student of biology 
this book will prove when we enumerate the subjects here treated: 
Variations observed among the Silurian Brachiopods of Bo- 
hemia. 
II. Vertical distribution of the aii and species of Brachio- 
pods in the Silurian basin of Bohem 
III. Specific connections catabtiched by the Brachiopods be- 
tween ihe Silurian faunz of Bohemia and the Paleozoic faunæ 
of foreign countries. 
HUXLEY ON THE CrAYFISH.2~Whether it is because we happen 
to be just now greatly interested in the crayfish and its belong- 
ings, or because this book is in itself very attractive, we confess 
ourselves very much pleased and interested in it. The method 
of teaching zoology now-a-days is to induce the student to learn 
all he can from the thorough, detailed study of one or several 
types, rather than to bewilder his brain with a ponderous. classifi- 
‘cation of the entire animal kingdom and a large but thin mass 
of superficial pseudo-knowledge of it. He is now taught to be- 
come, aé initio, an original investigator, to discover new facts for 
himself, or at least to discover what are to him new facts, and 
thus enthusiasm and real interest in the subject are bred. Just 
now a class of college students are studying with us and drawing 
the structure of the lobster, and with most excellent results in the 
way of exciting their interest and curiosity; judging by the re- 
sults this seems to us to be the very best way of i Ed natural. — 
history. This book, which is a monograph of the crayfish from 
x nie See Etudes locales. Extraits du Systéme Silurien du Centre de la Bo- 
hém l. v. Brachiopodes. 7 Planches. Par JoAcHIM BARRANDE. Prague 
et Pas, ae 8°, pp. 356. 
2 The International Scientific Series. . The Crayfish. An einer oi" to the : 
study of Zodlogy. By T. H. Huxtey. With 82 illustrations. sab DE, 
Appleton & Co., 1880. 12°, pp. 371. 
