Reviews. 99 
366.—-Snow-Plant.—Will someone give us a complete life- 
history of the “ red snow” plant, showing where and how gene- 
rated, whether the plant falls from the air ready formed, or do the 
spores only fall and then the plant grows on the snow? J. W. G: 
367.—Sun putting out the Fire.—Does the sun put out the 
fire? If so, why so? If not, why not ? CAPTAIN CUTTLE. 
368.—Spathe.—What is the definition of a spathe, and shew 
how the bract at the base of the snowdrop flower answers to this 
definition ? , BO} Bi 
369.—Fox Earth.—In many places in Derbyshire, a few inches 
below the surface, is found a fine, rich-looking soil, locally termed 
fox-earth. In it hardly anything will grow, and the farmers are 
very careful-not to turn it up in ploughing. What isit? I should 
be very pleased to send a sample to anyone interested. 
J. A. Hoce. 
370.—To increase Specific Gravity.—How much water must 
be added to commercial strong solution of ammonia, sp. g. °880, 
to give ita sp. g. of ‘891? J. A. Hoae. 
371.—Plant Constituents.—In Bentley’s ‘“ Botany,” amongst 
the inorganic constituents of plants, are given strontium, titanium, 
zinc, coesium, lead, copper, arsenic, cobalt, nickel, and barium. 
Will someone say in what plants these elements have been met 
with ? J. A. Hoce. 
Reviews. 
Forms oF ANIMAL LirE: A Manual of Comparative Ana- 
tomy, with descriptions of Selected Types. By the late George Rolleston, 
D.M., F.R.S. Second edition, revised and enlarged by W. Hatchett Jackson, 
M.A. Royal 8vo, pp. xxxilii—g37. (Oxford: Clarendon Press. London: 
Henry Frowde. 1888.) 
This edition was taken in hand by the late Prof. Rolleston in the Long 
Vacation of 1879, and was carried on by him until he left England in Dec., 
1880, by which time he had completed the descriptions of Preparations 1-—9 and 
3 new plates had been engraved under his direction. The distinctive character 
of this book, as described in the preface to the first edition, consists in its attempt- 
ing so to combine the concrete facts of Zootomy with the outlines of systematic 
Classification as to enable the student to put them for himself into their natural 
relations of foundation and superstructure. The foundation may be made 
wider, and the superstructure may have its outline not only filled up, but even 
considerably altered by subsequent and more extensive labours ; but the mutual 
relations of the one as foundation and of the other as superstructure, which this 
book particularly aims at illustrating, must always remain the same. There 
are 14 excellently engraved plates. 
