192 REVIEWS. 



The structure of the hair shows, both, that of wool (at the base) 

 and hairs (in the expansion). This form is not peculiar to the 

 Monotreinata. That of the Gopher, a small animal in the Missi- 

 sippi Valley, U.S.A., being nearly similar but finer. 



E. Hunter. 



Like the beaver and other fur-bearing creatures, the Ornitho- 

 rhyncus has two kinds of hair : one fine, apparently for warmth ; 

 the other coarser and longer. In the specimen may be seen how 

 in this curious animal the fine hair sometimes terminates in the 

 coarse. As in burrowing creatures, the hair has narrow parts, 

 which act as joints, and enables the animal to go backwards in his 

 hole without the hair changing its direction in the skin. 



T. Inman. 



1Rcvicw)9. 



A Synopsis of the Bacteria and Yeast Fungi and allied 

 species (Schizomycetes and Saccharomycetes). By W. B. Groves, 

 B. A., with 87 Illustrations. {London: Chaito and Windiis, 1884.) 



This work treats of the subject in hand in a very thorough and 

 exhaustive manner. 



The first chapter, occupying 56 pages, is devoted to various 

 genera, included in the group Schizomycetes^ viz. — Micrococcus, 

 Ascococcus, Cohnia, Bacterium, Bacillus, &c., of which altogether 

 79 species are enumerated, described, and illustrated by 57 figures. 



Chapter II. treats of the Saccharomycetes or the Yeast Fungi. 

 This group is composed exclusively of the genus Saccharomyces, 

 and has 12 species. 



We have next a chapter on Classification, followed by a des- 

 cription of the Protean or Little-known species, in which are 

 found several of the lesser-known Bacteria, Bacilli, and several 

 others. In all, 133 species of these minute fungi are described, 

 many of them being carefully illustrated. There are three Ap- 

 pendices, viz. — On the unit of Microscopical Measurement, on the 

 staining of " Bacillus Tuberculosus," and on diseases produced by 

 the Schizomycetes, of which we are sorry to find a tolerably long 

 list is possible to be given. 



