68 
are not produced at the present time by Abiogenesis, they 
must have gone on reproducing under their present simple 
form, unchanged in all essential respects for countless ages. 
For the consideration of those who would hold living matter 
to be something mysterious, endowed with a force unlike that 
which we see in other things, Haeckel submits the following 
grouping: 
a. Natural world: simple combinations of the elements, 
salts, alcohol, acetic acid, which have been formed syntheti- 
cally by chemists. 
6. Supernatural world: Felspar, Fluorspar, Augite, most 
other minerals, albumens, chitin, &c.: all bodies which have 
not been artificially made yet, and which, therefore, are said 
to have arisen by “ creation,” that is, by supernatural ways 
through some external, mysterious, creative power. 
An enumeration of the Monera as they now stand finishes 
this most interesting collection of ‘ studies,”’ with which we 
will conclude our review. 
a. Gymnomonera. Protameba (5 freshwater, 2 marine 
species). Protogenes (1 species, marine). Bathybius (1 
species, marine). 
Lepomonera. Protomonas (1 freshwater, 1 marine species). 
Protomyza (1 spec. marine), Vampyrella (3 freshwater, 1 
marine species), Myxastrum (1 spec. marine). 
It is probable, the author observes, that the common 
Actinophrys sol belongs here. Of the 15 known species 
Haeckel described 11, Cienkowski 3, and Huxley 1. They 
are widely distributed, occurring in ponds at Jena, in the 
Atlantic, and off Norway. It is probable that they will prove 
to be very numerous. 
Principles and Practice of Medical Jurisprudence, by 
ALFRED SwaIneE Taytor, M.D., F.R.S. London: J.and 
A. Churchill. 
Ir any one will take the trouble to compare this work with 
those that have preceded it, he will at once perceive to how 
large an extent the study of medical jurisprudence is in- 
debted to inquiries conducted by the aid of the microscope. 
It was an early hope of those who had investigated the 
tissues of the animal body with the microscope, that one 
day its results would influence decisions in our courts of 
law, and that its power to detect the nature of blood- -pro- 
duced stains might take from the murderer his too frequent 
excuse, that the spots of blood on his garments were those of 
