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 spJicericuni and of Ooccidium proprmm *. 



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 sardinae, sp. n.). — I met 

 with this second species in the testis of sardines which M. Henncguy 

 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 /k 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 characterof Coccidium sardince 

 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 aflBnity 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. sardince, the latter species is allied to C. sphcericum and 

 C. proprium (Sch.), 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 

 Rendus cles Seances de V Academie des Sciences, tome ex. June 9, 

 1890, pp. 1214 et seq. 



* " Ooccidies nouvelles ou peu connues," Tablettes zoologiques, t. ii. 

 (Poitiers, 1887). 



