196 
Miscellaneous . 
Each of these sporozooids occupies nearly the entire length of the 
spore, but they are intertwined in such a way that the broad 
extremity of the one corresponds to the tapering extremity of the 
other. The nucleus is situated towards the middle. At one of the 
extremities, and often at both, we find a little globule analogous, 
in position at least, to the vacuoles described by Schneider in the 
spores of Coccidium sphcericum and of Coccidium proprium *. 
I have not been able to follow the history of this parasite further, 
and the ultimate destiny of the spores is unknown to me, as is also 
the manner in which the sticklebacks become infected. Probably the 
spores reach the intestine by way of the bile-ducts and are thence 
carried to the exterior ; but I have never met with them in the 
digestive tract. 
(ii.) Coccidid of the Sardine (Coccidium sardine, sp. n .). — I met 
with this second species in the testis of sardines which M. Henneguy 
procured from Concarneau and which he was good enough to permit 
me to examine for parasites. Unfortunately I am compelled to 
restrict myself to giving the characters of the adult state, the only 
one which I was able to observe. 
The spherical cysts measure about 50 fj in diameter. In sections 
of the testis they are to be found in the seminiferous tubules ; but 
I was not able to determine their presence in the cells. In the 
interior of the cyst one finds a granular mass applied against the 
membrane, and in this four fusiform spores are implanted. The 
latter, approximated at their fixed extremity, diverge at their free 
ends and affect a more or less regular radial arrangement. Each 
of these spores encloses two sporozooids with a nucleus ; the sporo- 
zooids do not occupy the whole length of the spore, and they are 
only very slightly intertwined. 
A remarkable and highly distinctive character of Coccidium sardinoe 
is the small amount of space in the cyst occupied by the granular 
mass and the spores. 
This is the sum of the facts which I have been able to make out 
concerning this new enemy of the sardine. I have been led to 
publish this incomplete description owing to the interest attaching 
to the affinity between and comparison of the two Coccidea whose 
characters I have just given. By the disposition of the spores, 
which are free in Coccidium gasterostei and implanted in a residual 
mass in C. sardinoe , the latter species is allied to C. sphcericum and 
C. proprium (Sell.), and the former to C . oviforme . 
In conclusion, these two Coccidea present this interesting cha- 
racter, viz. that the whole of their development takes place in the 
organ which they have attacked, and that one does not notice two 
periods in their cycle of development, as is the case in many of 
these parasites, and especially in Coccidium oviforme . — Comptes 
JZendus cles Seances de VAcademie des Sciences , tome cx. June 9, 
1890, pp. 1214 et seq . 
* u Coccidies nouvelles ou peu connues,” Tablettes zoologiques, t. ii. 
(Poitiers, 1887). 
