314 SUMMARY OF CURRENT RESEARCHES RELATING TO 



the summer of 1905. The mosquitos involved were, first Anopheles 

 si/perpictus, next A. daviger, and, rarest of all, A. Mfurcatus. Of ?>00 

 cases, 148 were infections of Pnmox, 87 of Vivax, 8 of PL malarm, 

 14 of Vivax- Prrecox. 2 of PI. malarm- PrcBcox, while 46 were un- 

 determined. The observers give some notes on the ring form of parasites, 

 and discuss the significance of free chromatin-granules and pigment- 

 corpuscles which occur in malaria blood. These are regarded as the 

 remains of dead parasites, and are important for diagnosis in cases where 

 the parasites are absent. 



Spirillosis of Fowl.* — Levaditi and Manouelian find that Brazilian 

 septicaemia is not due to an exclusively vascular proliferation of 

 SpiriUum f/allinarum ; the parasite invades the different glandular tissues 

 and comes into intimate contact with cellular elements. Treponema 

 pallidum does not appear to penetrate into the protoplasm of the cells. 

 The crisis which ends the infection is due to phagocytosis of the 

 spirilla, by the macrophages of the spleen and liver. The spirillum of 

 Marchoux and Salimbeni is capable of experimental infection of the 

 ovary. 



Bacilliform Piroplasma of Deer.f — A. Bettencourt, C. Franca, and 

 I. Borgcs descril)e from deer in the Park at Mafra a bacilliform piro- 

 plasma exhibiting characteristic cruciform parasites as well as rod forms. 

 It is distinct from P. bigeminum, and the authors propose for it the 

 name TheiJeria cervus sp. n. Its introduction to Europe is supposed to 

 have been brought about bv infection from ticks off zebus which are in 

 the Park at Mafra. 



Sporozoon Parasite of Pearl-oyster. | — R. Dubois found in the 

 nucleus of a small pearl a small sac containing encysted spores of a 

 sporozoon. The small cyst had lodged in the thickness of the mantle ; 

 it is regarded as the cause of the formation of the pearl. 



New Species of Myxobolus.§— M. Auerbach describes irom. Ahramis 

 brama what seems to he a new species of Myxobolus, exceeding all the 

 known forms in size, and therefore named M. fj/if/as. 



Intracystic Dehiscence of Spores in Myxosporidia.|| — Casimir 

 Cepede discusses the dehiscence of the spores of Myxobolus cycloides 

 from the kidney of Leuciscus rutilus, and shows that it is intracystic. 

 The same is true of Henneguya 2Jsoros2wrmica 2Jeriintestinalis. 



.etiology of Souma.li — G. Bouffard discusses this disease of Bovidas 

 and Equidse in the Soudan, which is due to Trypanosoma cazalboui, and 

 seems to be disseminated by Stomoxys. 



Sporozoon Parasite in Blood of Yellow Fever.** — Max Schiiller 

 describes in a blood preparation of a case of yellow fever from New 



* Aun. Inst. Pasteuf, xx. (1906) pp. 593-600 (1 pL). 



t Arch. Real lust. Bacteriol. Camara Pestana, i. (1907) fasc. 2, pp. 341-50. 

 (2 pis.). X C.R. Soc. Biol. Paris, xlii. (1907) pp. 310-11. 



§ Zool. Anzeig., xxxi. (1907) pp. 886-91 (5 figs.). 



II C.R. Soc. Biol. Paris, Ixii. (1907) pp. 135-7. 



•j Tom. cit., pp. 71-3. 



** Berl. Klin. Woehenschr., 1906, No. 7 (1 fig.). See also Centralbl. Bakt. 

 Parasitenk., Ref., xxxviii. (1906) pp. 765-6. 



