90 Mr. Grirrirx on the Development of 
The lateral excavation F is much enlarged, as is likewise the young 
ovulum g. The line Ca is pushed to one side. 
5a. Young ovulum detached from the same ovarium. 
Fig. 6. Ovulum a little more advanced, detached with the nipple-shaped pro- 
cess, the brown curved lines of which were in this instance no longer 
visible ; the process is rather papillose at its apex. 
Fig. 7. Ovarium still more advanced. The excavation has become much en- 
larged ; the ovulum g has now attained a considerable size, and has 
become nearly central. The commencement of its development up- 
wards into horn-shaped processes is visible at g a. 
Tas. XI. 
Fig. 1. Nipple-shaped process detached from an ovarium soon after impregna- 
tion. 
Its apex is of a light brown colour ; communicating with the lower 
parts of the curved lines is an obscure channel, the edges of which 
appear of a light brown. "This appearance of a channel of commu- 
nication between the apex of the nipple-shaped process, to which, 
probably, the male influence is applied, did not appear to be uni- 
versal or even general. A vesicle filled with brown grumous gra- 
nules is seen attached to the lower part of one side of the process by 
a broad base. 
Fig.2. Nipple-shaped process, with the central opake line dissected out. The 
two curved lines are very conspicuous, and of a rather deep-brown 
colour. The apex appears papillose. The broad cellular, irregular 
portion visible on one side indicates the site of attachment of an 
ovulum. 
Fig. 3. Ditto, with an ovulum more advanced, detached with the upper portion 
of the opake line or stalk. The young ovulum is now attached by 
à narrower base, and is evidently cellular. 
Fig. 4. Ovulum at about the same period of development ; the attachment is 
very narrow: at the commencement of the narrow portion, and in 
its centre, a globular vesicle is just visible; this is, I imagine, the 
