Analyses of Books, 
[March, 
202 
seems to seek in South-eastern Europe. As an argument m 
favour of this view, he contends that the linguistic remnants 
common to all the subdivisions of the Aryan race betrays no 
acStance with the fauna and flora of Asia It may be re- 
nlied that the fauna of Asia, excluding the “ Indian region of 
Wallace, differs little from that of Europe, and that anciently 
the difference was probably less than at present. . 
The remainder of the work is devoted to a description m detai 
0f We 6 c\ 3 n 0 d U ecid a e C dl S y “commend'this treatise to all students who 
wil to acquTre a comprehensive knowledge of ethnology as now 
understood without being compelled to wade through a mass of 
learned journals and transactions. 
details is of course impossible, but we shall endeavour 
the pmc[ed"ng e from ln the theory of Knox, subsequently demon- 
strated by the researches of Waldeier, that every embryo 1S 
first bisexual, he succeeds in throwing a we ^ n ® ^ 
obscure phenomenon of parthenogenesis. He shows that, ’ 
the Anhides the ovum or female element is fecundated by 
the adtion of an embryogenous vesicule, which i is the ^homologue 
of a spermatoblast of the male sexual gla , 
fecundation there results the development of the egg p 
formation of a perfea animal. Hence, a female Aphis is histo 
logically, though not morphologically, a hermaphrodite. J“ d S‘| 
from the frequence of parthenogenesis among other J"y er ‘f ra [® 
animals a similar hermaphroditism is far from exceptional, in 
the silkworm a certain number of non-fecundated eggs undergo 
their normal development. Barthelemy records that on one oc- 
casion all the eggs laid by a virgin female proved prohfic 
Among other Lepidoptera it is certain that there is only a small 
number of males.f Among the Psychid* parthenogenesis is an 
* Lessons on the Generation of the Vertebrata. .... , . 
f We are here on debateable ground ; many authorities declare that among 
butterflies the males predominate in number. 
