90 Mr. Griffith on the Development of 



The lateral excavation /" is much enlarged, as is likewise the young 

 ovulum g. The line C a is pushed to one side. 



5 a. 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. 



Tab. 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. Tlie 

 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 

 a 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 



