Analyses of Boohs. 
426 
ljuly, 
laureline, the oranges and tropaeolines, rose Bengale, saffrosine, 
&c. On the other hand, certain dye-wares — which were spoken 
of at length in the first edition — have passed to such an extent 
out of use that they now need and receive but scant mention. 
The principal omission which we deteCt is croceine scarlet, a 
colour which is now coming rapidly to the front, both in wool 
and cotton dyeing. Bisulphide of carbon has by some oversight 
been twice mentioned. As a whole, however, this manual carries 
out in a most satisfactory manner what it undertakes to do. The 
descriptions of the various dye-wares, &c., are singularly clear 
and concise, and there is throughout the work a complete absence 
of that “tall talk” and assumption of omniscience which too 
often render technological manuals at once unintelligible and re- 
pulsive to the busy practical man. The former edition was 
deservedly a favourite among those best able to judge, and we 
consider that the work in its present revised form will receive 
still wider approbation. There is an exceedingly copious index, 
and the getting up of the book reflects great credit on the 
publishers. 
Records of the Geological Survey of India. Vol. XV., Part 2. 
1882. 
In an examination of certain Siwalik and Narbada fossils, Mr. 
R. Lydekker, F.Z.S., concludes that Falconer’s subgenera 
Hexaprotodon and Tetraprotodon must be abolished, as their 
distinctive characters are found in the same species. It seems, 
further, almost certain that it is the second pair of incisors 
which is suppressed in the African hippopotamus. This circum- 
stance may prove of some importance in determining the homo- 
logies of the incisors in other Ungulates — e.g., Rhinoceros— in 
which the whole of the typical series is not developed. 
A molar tooth of Mastodon sivalensis, from the Punjab, is 
described as presenting a peculiarity in the arrangement of the 
enamel not heretofore recognised in the teeth of the Proboscidia . 
The enamel is thrown into a number' of folds, placed at regular 
intervals from each other, which penetrate into the dentine of 
the cones and converge towards their centres. The horizontal 
section of one of these cones displays a structure, as regards 
the depth of the folds of the enamel, intermediate between that 
of the teeth of Ichthyosaurus and Labyrinthodon. 
Mr. Lydekker gives also a catalogue of Captain Searle’s col- 
lection of fossils from Perim Island, — not, we presume, the 
Perim in the Red Sea. 
Some ophidian vertebrae from the Siwaliks seem to be identical 
with those of the still living species, Python molurus. 
