Dr. Burnett on the Development of Viviparous Aphides. 69 
Another point is, these viviparous individuals have no proper 
ovaries and oviducts. Distinct organs of this kind I have never 
been able to make out. The germs are situated in moniliform 
rows, like the successive joints of confervoid plants, and are not 
| 
enclosed in a special tube. These rows of germs commence, 
eit no alternative but to regard them as buds, true gemme, 
Which sprout from the inner surface of the Aphis, exactly like 
lyp. “ons 
Before proceeding to a discussion of the relations of this im- 
portant conclusion to which we have just arrived, it may be well 
to refer to the views of others upon the exact signification of 
these singular reproductive phenomena. 
Those old entomologists, such as Bonnet, Réaumur, Degeer, 
¢., who were the first to observe, besides verifying beyond all 
doubt, these peculiar phenomena, all believed that each brood 
Constitutes a separate generation, and that the reproduction takes 
place by true ova, as in the common generative act of other in- 
cts. This wide deviation from the ordinary course of nature 
aS It seemed to them, they attempted to explain and reconcile by 
Various theories. Thus, Réaumurf affirmed that these viviparous 
individuals were androgynous; and, in later times, Leon Dufour,$ 
vho knew too well the anatomical structures of insects to be- 
lieve with Réaumur that they could be hermaphrodites, referred 
these phenomena to spontaneous or equivocal generation. 
Which are found in the true ovi betw: 
, arous A es, buds and ova. 
t I would insist upon this pie and ioaokiaas distinction between gon 
pon e, and there is no passage 
Réaumur, loc. cit. Mém! en 
