128 Scientific Intelligence. 
Ill. Zoonoey. 
55. The Blood-Corpuscle considered in iis different phases of devel- 
opment inthe Animal Series ; by Tuos. Wuarton Jones, Esq., F.R.5S., 
lecturer on Anatomy, Physiology and Pathology, at the Charing Cross 
Hospital, (Roy. Soc. June, 1845.—Ann. Mag. Nat. Hist. xvi, 1845, 131.) 
—This paper is divided into three parts ; the first relating to the blood- 
corpuscles of the Vertebrata ; the second to those of the Invertebrata; 
and the last to a comparison between the two. He first describes the 
microscopic appearances of these corpuscles in different classes of ver- 
tebrate animals, beginning with the skate and the frog, and proceeding 
to birds and mammifera ; first in their early embryonic state, and next 
in the subsequent periods of their growth. He finds in oviparous ver- 
tebrata generally, four principal forms of corpuscles. These he dis- 
tinguishes as the phases, first of the granule blood-cell, which he de- 
scribes asa cell filled with granules, disclosing by the solvent action of 
dilute acetic acid on these granules a vesicular, or as the author terms 
it, a “ celleform” nucleus. These granule cells appear under two sta- 
ges of development, namely, the coarsely granulous stage and the fine- 
ly granulous stage. The second phase is that of the nucleolated blood- 
cell, oval in shape, containing a vesicular (or “ celleform”) nucleus, 
and red-colored matter. These cells likewise appear under two stages 
of development; colorless in the first and colored in the second, in 
which last stage it constitutes the red corpuscle. In the early mammif- 
erous embryo, he finds, in addition to the former, a third phase, that of 
Sree vesicular nucleus, exhibiting, like the nucleolated cell, the color- 
less and the colored stages. 
On examining the corpuscles of the lymph of vertebrate animals, the 
author finds them in all the classes to be identical in structure with their 
blood-corpuscles, and differing only in the inferior degree of coloration, 
attending their laststage. In the oviparous classes, he observes that the 
nucleolated are more numerous than the granule cells, while in the 
mammifera the latter are predominant, which is the reverse of the pro- 
portion in which they exist in the blood of these animals. He finds 
that some of the nucleolated cells of the contents of the thoracic duct 
exhibit a marked degree of coloration, and have an oval shape; thus 
offering a resemblance with the blood of the early embryonic state. 
The blood-corpuscles of all the invertebrate animals in which the 
a _ author examined them, present the same phases of granule and nucleo- 
lated cells as in the higher classes, excepting that in the last stage of the 
latter phase the coloration is very slight, but the vesicular nucleus is 
distinctly colored. As in the higher classes, corpuscles 
exist i in perent states of transition from the granular to the nucleola- 
