292 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



Bori are distributed through the tissue, and open generally on the upper 

 surface like small cups. A series of micro fungi are also included in the 

 paper, several of which are new to science. A. L. S. 



Study of Plasmodiophora BrassicsB.— Giovanni Briosi {Atti 1st, 

 Bot. Univ. Favia, 1918, Ser. 2, 15, 281-321, 3 pis.) has published the 

 results of his physiological and pathological researches on Plasmodio- 

 phora. He finds that the spore has a closed* membrane, that it pro- 

 duces — but not constantly — flagellate bodies which become transformed 

 to amoebae and later unite to form a Plasmodium. The amoebae are 

 uninucleate ; then from the chromatic body other chromatic groups are 

 formed which become in time true nuclei. As many spores are formed 

 as there are nuclei. With Plasmodiophora he associates the organism 

 that causes hydrophobia in dogs, etc., which he places in the same 

 family under the name Neurocytes hydrophobise WiWiams. The parasite 

 causing distemper (cimurro) in dogs is N. canis (Sinigaglia). A. L. S. 



Schizophyta. 



Schizomycetes. 



Infections with Coccidium and Isospora in Animals in tne 

 Philippine Islands, and their possible Clinical Significance.— Frank 

 G. Haughwont {Philippine Journ. Sci., Sect. B., Tropical Medicine, 1918, 

 13, 79-93). The author discusses the recorded cases of coccidiosis in 



1 2 3 4 5 



Fig. 1. — Cyst of Isospora Bigemina in early stage of development. 

 „ 2. — Later stage, showing development of sporocysts. 

 ,, 3. — Completely developed cyst. 



„ 4. — Cyst of Coccidium cuniculi in early stage of development. 

 ,, 5. — Completely developed cyst. 



man, including Wenyon's human Isospora infections. Coccidiosis of 

 domestic animals is common in the Philippine Islands, and he suggests 

 that as infection in man probably occurs by transmission from such 

 animals, human coccidiosis will probably be found to exist in the 

 islands when closer inquiry is made. 



He figures three stages in the development of Isospora Bigemina 

 which he obtained from a kitten (figs. 1-3), and gives the average size 

 of the cysts, which are usually oval, as 20 /^t by 16 fi. When spherical, 

 however, the diameter was about 19 /x to 20 /a, a measurement correspond- 

 ing very closely with Wenyon's human forms. 



The cysts are very resistant to lethal agents. The author watched 



