Excerpt from Archiv Für Protistenkunde, 1909, Vol. 13: Mit 28 Tafeln Und 40 d104figuren The cysts are always free in the crop contents and are exactly similar to those found in the faeces. They are either oval, round or pear shaped bodies (plate I Fig. 1) measuring from p to 4 p in length and from 2 p to a in breadth. Their protoplasm stains a delicate blue with Romanowsky's stain and light pink with Giemsa's and when highly magnified is seen to consist of a delicate reticulum which in parts is finely vacuolated. The parasites are clearly outlined by a condensed layer of protoplasm, the periplast, which stains deep blue with Romanowsky's stain but pink with Giemsa's. The nucleus, nearly always at the rounder end Of the parasite, is a compact mass staining deep pink and measuring about 1 a in diameter; it may be circular or more commonly kidney-shaped with the concavity directed towards the centre of the cell. When highly magnified it is seen to contain four chromosomes, this number however is not always constant as very often only two can be distinctly seen; many of the nuclei show a central pale area, while the margin stains much darker probably owing to the chromosomes occupying the periphery. In specimens deeply stained by Giemsa's stain and subsequently decolorised the recticulated nucleus appears to be surrounded by a distinct membrane (plate I Fig. The blepharoplast, about one third the size of the nucleus, is almost always circular in shape and stains deep magenta with Romanowsky's and Giemsa's stains. It is as a rule situated about the centre of the parasite but may be displaced to either side. Owing to its small size and great avidity for the stain it is not possible in ordinary specimens to demonstrate any inner structure but in ruptured cells it is seen to contain (under a magnification of 2700 diameters) a small chromatic dot; in some Specimens it had the appearance of a small ring. There was no other structure visible in the cysts. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.