l68 Journal of Comparative Neurology. 



indications have been noticed of connections with the inner 

 roots of these bodies are of such a fragmentary and otherwise 

 imperfect nature as to render their existence very doubtful. All 

 that may be safely said is that it is connected with the fibrillar 

 arch, possibly the ocellar glomerule, with the mass of associa- 

 tion fibers immediately in front, with the lower lateral regions 

 of the proto-cerebron, and with the trito-cerebral region form- 

 ing the cesophageal commissure, where its fibers may possibly 

 connect with others entering from the ventral cord, or with 

 those belonging to the ventro-cerebron. 



THE TUBERCLES OF THE CENTRAL BODY. 



Behind the lower portion of the central body and partly 

 covered by the overhanging upper portion (fig. 6, PI. XV) are 

 two small round, deeply staining masses of fibrillar substance to 

 which Viallanes (s?) applied the term of " tubercules du corps 

 central." Just what their relations are to the central body, or 

 what may be the origin of the fibrils forming them I have not 

 been able to determine definitely. But from the fact that in 

 thick unstained sections one can distinguish in the immediate 

 neighborhood behind them masses of fibrillar substance of a sim- 

 ilar globular appearance I am inclined to think them globules of 

 the same kind and having the same or similar relationships as the 

 latter. My preparations do not satisfactorily show fibers leading 

 into or going from them. But there are indications that the mass 

 of smaller glomerules is formed by terminations of the nerves 

 from the ocelli very much as the so-called olfactory glomerules 

 later to be described are produced by the terminations of the 

 fibers from the antennae, and for that reason I choose to call 

 them ocellar glomerulas. This particular region of the brain 

 along with the central body needs considerably more light than 

 I am at present able to throw upon it. 



THE FIBRILLAR ARCH. 



This peculiar structure may as well be considered here, 

 since it is connected with the central body, behind which and 

 somewhat below the level of whose upper surface it lies. It is 

 a rod-like mass of fibrillar substance that upon either side rises 



