218 Henry LesLre ÖsBorn, 
cells, the larger ones are furnished with ciliary organs like those 
of the recurrent vessel and its branches. 
The capillaries terminate in minute organs occupying the same 
position as the “flame-cells” found in so many of the trematodes, 
but not entirely agreeing with them in structure. They cannot be 
seen at all in sections and only with great difficulty in living com- 
pressed animals. They are in form a rather sharply tapering funnel 
as shown in Fig. 29, measuring 0.007 mm across the base and 
0.01 mm in height. The organ is clothed within with very minute 
separately acting cilia, very unlike the long ciliary organs occupying 
the central cavity in true flame cells. The latter if present would 
surely be visible since it would be more conspicuous than the cilia 
on the sides. The base of the funnel-organ seemed to be open, a 
nucleated cell with branches reaching out into the parenchyma could 
not be found. STAFFORD found similar funnels in Aspidogaster with 
cilia on their sides and no central ciliary organ. He recognized 
nuclei “at the bases outside of the funnels”, and believed that the 
funnels were closed, but could not recognize the flame cell. In 
Amphistomum clavatum (Looss, 1892) similar funnels are found with 
minute cilia clothing the sides of the funnel and no central ciliary 
organ. It would then seem possible that im addition to the true 
flame cell there exists in some trematodes a second kind of terminal 
structure the “funnel-organ” clothed with cilia on the surface instead 
of having the central flame producing ciliary organ, and possibly 
not closed at the base. The capillaries next the funnel organs are 
not ciliated. 
h) The nervous system and sense organs. 
My knowledge of the central nervous system is very incomplete. 
There is a transverse commissure crossing dorsally the anterior end 
of the pharynx. The lateral nerve runs from this posteriorly and 
can be recognized in sections running well back toward the hind 
end of the body. An anterior lateral nerve runs forward to the 
mouth funnel. 
The eyes when present are very noticible as a pair of black 
spots one on each side of the pharynx. Eyes are very uncommon 
in adult digenetic trematodes, but not so rare in the monogenetic 
ones. I am not at all certain that they are functional in Cotylaspis, 
they seem not to have been present in the specimens of C. lenorri 
known to Porrrer. As regards the presence of eyes in C. insignis, 
