ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 307 



an incomplete fusion of two individuals. Here the author's argument 

 seems to us somewhat unsatisfactory.] 



Trypanosomiasis.* — Patrick Manson suggests that the infecting 

 agent in this disease may be the poisonous tick— Ornithodorus (Aryas) 

 moubata of the Zambesi valley. A. Maxwell-Adams, junr.,f suggests 

 that the rat is the intermediate host, and that the original seat of the para- 

 site is some insect (Pulex ?) peculiar to, and living only on the juices 

 of the rat. He believes in inoculation from rat-bite. If the infection 

 were due to ticks or mosquitos one would expect greater frequency. 



Nature of Cytoryctes vaccinae .J— Anna Foa discusses the nature 

 of the vaccine and variola corpuscles which have been regarded by some 

 as Sporozoa, by others as Staphylococci, by others as modified leucocytes, 

 fragments of cells, &c. The conclusion come to is that the corpuscles 

 in question are not living parasites ; they are without nucleus, chromatin, 

 amoeboid movement, or power of multiplication. 



In a subsequent paper § further observations on the so-called Cyto- 

 ryctes vaccinae are described, the possibility of the corpuscles being 

 Protozoa or parasites of any kind is definitely excluded, though the 

 possibility of parasites being present is not of course denied. 



Coelomic Gregarine in a Beetle. || — L. F. Blanchard describes 

 Monocystis legeri sp. n., which occurs in encysted and vegetative stages 

 in the general cavity of the body of Carabus auratus. The only other 

 •cases of " coelomic " Gregarines in beetles are those reported by Leger 

 in larvae of Oryctes nasiconiis and Geotrvpes stercorarius where the cysts 

 •of an intestinal Gregarine protrude on the external surface of the 

 intestine into the cavity of the body. In Blanchard's case there is 

 ;dso an intestinal Gregarine— A ncyrophora gracilis Leger. 



Haemogregarines of Ophidia.H— A. Laveran describes new species of 

 Hcemoyregarina from the blood of Naja tripudians, Zamenis hippocrepis, 

 Grotalus confluentus, and Ancistrodon piscivoras, raising the number of 

 Ophidian hosts of Hasmogregarines to thirty-two. No forms in process 

 of multiplication were seen in the blood, as is also true of Chelonians. 

 In the latter the multiplication occurs in the liver, &c, and Laveran 

 found stages in the lung of Eunectes murinus. He thinks it likely that 

 infection is due to ectoparasites, e.g. Ixodes. 



* Brit. Med. Journ., No. 2201, March 28, 1903, pp. 720-1. 



t Tom. cit., pp. 721-2. 



X Atti R. Accad. Lincei (Rend.), xii. (1903) pp. 64-71. 



§ Tom. cit., pp. 88-93. 



|| Comptes Reudua, exxxv. (1902) pp. 1123-4. 



•«jf Tom. cit, pp. 103G-40 (13 tigs.). 



• I <gs»»- 



