346 MR. J. DALRYMPLE’S DESCRIPTION OF AN INFUSORY 
and the contractile vesicle or respiratory bag (C). Both it and the ovisac 
(D) appear to communicate with the valvular opening or vagina (E), but 
whether by a separate or common passage is as yet doubtful. The ovisac 
is partially contracted and thrown into folds, and attached by muscular or 
ligamentous bands to the yoke-shaped ovary (F). The stomach (G) is dis- 
placed to one side. 
Fig. 8. Represents the muscular system and what appears to be a rudimentary ner- 
vous system. 
The muscular bands which retract the body of the animalcule are seen 
rising by broad origins from the firm coronet of the animalcule, and 
pass down the interior of the body, free and unattached, to be inserted 
by digitated processes into those circular tegumentary rings which 
have been described as vessels by Ehrenberg. 
Over the stomach, which is here represented empty and somewhat flat- 
tened, muscular bands may be seen extending from the oesophagus to 
its very fundus. Two delicate muscular bands are fixed to the interior 
or bottom of the tegumentary case, and inserted into the fundus of the 
stomach, and are retractors of this organ. 
A. Shows the pink eye situated in a mass of nervous or ganglionic matter, 
from which proceeds a delicate chord, having at B two ganglionic cor- 
puscles and terminating at the two setaceous tubercles at the side of the 
animalcule at E. At C, delicate nervous chords go off* to be distributed 
to the stomach, pancreatic or salivary glands and ovaries ; and at D, 
another ganglion appears to give off fibrillee too doubtful to be here in- 
dicated. 
PLATE XXXIV. 
Fig' 1. A portion (one horn) of an ovary, magnified 700 diameters, showing the gra- 
nular stroma, and the vesicles and their included nuclei and bright nucleoli. 
Fig. 2. An ovum, as yet attached to the ovary, exhibiting the granular yelk, and the 
excentric germinal vesicle, with a bright nucleus. 
Fig. 3. The resolution of the yelk into several cells, each having a nucleus. 
Fig. 4. A further development of nucleated cells, beginning to be massed together in 
groups. 
Fig. 5. Symmetrical arrangement of the groups of cells, the uppermost group indi- 
cating the future position of the head. 
Fig 5". A condition of the ovum seen once only, in which the yelk appears divided 
into two masses, without regular nucleated cells : a few oil-globules are seen 
irregularly distributed. Whether this be a fertile ovum is doubtful, but 
further changes were not observed, the parent animalcule dying. 
