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Show 70 DR. J. MURIE ON THE WALRUS. [Jan. 23, them,-viz. that the posterior half of the body is more or less of a reddish or pinkish hue, the remaining segment being pale-coloured. I myself incline to the opinion that this coloration m ay not be of a specific kind, but due in some measure to the intensely congested condition of the stomach and sanguineous nature of the food. The accompanying figures I have had drawn under m y supervision ; and Dr. Baird is pleased to consider them a faithful delineation. Ascaris bicolor, Baird. A. Three female specimens, of about the natural size; that to the left shows the manner in which occasionally the caudal end is found coiled up. B. Portion near the middle of the body, enlarged so as to display the transverse striations and how some of them interdigitate. C. Magnified view of the head and labia. There still remain two points worthy of consideration-viz. the cause of death, and whence the Entozoa were derived. 1. Death seems to have resulted from the ulceration of the stomach. It is not clear, though, why the animal should have succumbed so suddenly. Literally speaking, these ulcerations were so extensive that it is curious the animal should have survived so long. The chronic stage of the ulceration alone accounted for this. This instance is one exemplifying pure chronic gastritis, due, no doubt, to the presence in such numbers of the Entozoa. 2. It has been said by some parties that the Entozoa were possibly derived from food given to the Walrus after its arrival at the Gardens; but there are many reasons against this being a likelv circumstance. In the first place, the fact of the Entozoa bein°- a new species peculiar to the Walrus militates against the above assertion. |