330 On the Blood Corpuscles of the Mamm iferous Animals. 



can and Hog Deer, but not so numerously as in this specimen 

 of blood from the Muntjac. It was obtained from a vein of 

 the ear; the animal a male, nearly full-grown, and bred in 

 the Zoological Gardens, where its parents died, and are pre- 

 served in the museum of the Society. 



2. Mexican Deer (Cervus Mexicanus}. Circular corpuscles 

 not so numerous as some very singular oblong particles, 

 similar to those seen in the blood of the Muntjac. The 

 circular corpuscles generally about l-6000th of an inch in 

 diameter; the oblong corpuscles l-3200th to l-2400th of an 

 inch in length, and 1-J 2,000th to l-8000th in breadth, at their 

 gibbous part. In this situation a few of them are as large as 

 the circular discs. The blood examined was obtained from 

 a vein of the ear of a female, apparently full-grown. The 

 observation was the same whether made on the recent or dried 

 blood. The veins in the ear of the animal are numerous and 

 very apparent. From another bleeding, a week after the first, 

 the same result obtained. 



3. Hog Deer ( Cervus porcinus, albino var.). In some blood 

 obtained from a prick of the upper lip, the corpuscles were 

 found to be similar in size and shape to those described in the 

 Muntjac and Mexican Deer, except that some of the circular 

 discs appeared a little larger, and they were generally as nu- 

 merous as the singular oblong corpuscles. For a second trial, 

 some blood was obtained from an incision of the ear, about a 

 fortnight after the first bleeding, and the former result con- 

 firmed. The animal was a male, apparently full-grown. 



In conclusion, it may be remarked that the peculiar particles 

 now described, so singularly variable and anomalous, and 

 susceptible of such remarkable mutations in their figure, af- 

 ford a very interesting subject for further inquiry, which may 

 probably illustrate the physiology of the blood corpuscles. At 

 present so little is known respecting these curious bodies, and 

 so much is to be expected from future research, that we 

 know not what degree of importance may belong to them, al- 

 though there is reason to believe that the discovery of their use 

 and method of formation would be of great value to science. 



An Appendix to the " Observations on the Blood Corpuscles of 

 certain Species of the Genus Cervus." By GEORGE GULLI- 

 VER, F.R.S. 



(Read before the Royal Society, Feb. 6, 1840.) 



Since I had the honour of transmitting my communication 

 to the Royal Society " on the Blood Corpuscles of certain 

 species of the genus Cervus" I have had an opportunity of 

 examining some blood obtained from a deer lately received 

 at the Zoological Gardens from the Persian mountains. I am 



