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Show 1870.] MR. GULLIVER ON THE BLOOD-CORPUSCLES. 93 Times and Gazette' from August 1862 to December 1863, and in the ' Proceedings' of this Society for February 25, 1862. In the subjoined woodcut are represented dried red blood-disks of four Mammalia, to wit:-1. Tragulus javanicus ; 2. Moschus moschiferus; 3. Cervus alces; 4. Orycteropus capensis. Figures 1 and 4 show specimens of the smallest and largest of these corpuscles yet known among Mammalia ; and figures 1, 2, and 3 some marked differences in the size of the corpuscles of Ruminantia. SOOOthB. I i i L i I ef r.jiliidi. Bed Blood-Corpuscles. Fig. 1. Tragulus javanicus. Fig. 3. Cervus alces. 2. Moschus moschiferus. 4. Orycteropus capensis. Moschus moschiferus.-Through the courtesy of Professor Flower, I have examined the blood of the female of this species that died at the Zoological Gardens on the 26th of October, 1869 ; and the result affords an interesting complement to or illustration of m y original observations on the blood-disks of Tragulidee and some other Ruminants. Their mean size in Cervus alces is Y§T5 °^ a n hich. Of the blood-disks of Moschus moschiferus, the report to him of my examination was to the effect that this species appeared to be no near relation to those three " Musk-deer " of which I had formerly examined the blood, that M. moschiferus could hardly belong to the same genus as that which includes those three species, and that there was no appreciable difference of size between the blood-disks of M. moschiferus and those of Cervus nemorivagus. From thirty-one measurements of the red blood-corpuscles of Moschus moschiferus their average diameter was found to be y ^W of an inch; and an independent measurement by Professor Flower and Mr. Moseley made them closely of the same size. The extreme sizes observed by me were -g-gVg* and 5--3VS of a n inch. And thus, with this animal, the Ibex, Brocket-deer, and Tragulus, m y observations show that we have three or four genera at present known with blood-disks smaller than those of the Goat. Though these corpuscles of Moschus moschiferus are so small as at once to declare the Ruminant order to which this animal belongs, they may be seen at a glance to be at least a third larger than those of Tragulus, and little more than half tbe size of the blood-disks of Cervus alces. And how close is the correspondence in this respect |