50 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Spirochsets of the Intestine in Birds.* — C. Lebailly finds abundant 



Spirochaets in the terminal portion of the intestine of fowls, partridges, 

 crows, starlings, sanderlings, plovers, and other birds. He names and 

 briefly describes a number of new species of Treponema. 



Schizotrypanum cruzi.t- -Kurt Nagler finds that mice, rats, guinea 

 pigs, rabbits, dogs, and cats can be infected with this Trypanosoma He 

 was not able to transfer.it to canaries, lizards, or pigs ; or to find that it 

 was carried by insects. The stages which Chagas called male and 

 female are really vegetative phases. Divisions occur in the peripheral 

 blood-vessels and may be observed even two hours after death. 



Schizogony of Female Gametocytes of Laverania malari8e4 — 



N. H. Swellengrebel describes stages which appear to represent a schizo- 

 gony of the young half -moon stages of the female gametocytes. 



Flagellates of Larval Tipula.§ — Doris L. MacKinnon notes that 

 at least eight flagellates and two ameebse live as parasites or more 

 probably symbionts in the rich bacterial flora of the intestine of the 

 larval crane-fly. The largest and healthiest-looking grubs were generally 

 found to have the richest intestinal fauna. 



The encystment of a beautiful little monoflagellate, Rhizomastix 

 gracilis Alexeieff, is described. The cysts showed no trace of fusion of 

 nuclei, nor any indication of a sexual process. They seem to be simply 

 multiplication cysts. 



A description is given of Tetratrkhomastix parisii subg. et sp. n., a 

 flagellate with a slender and rather poorly developed axostyle and with 

 five free flagella, four anteriorly and one posteriorly directed. The 

 nucleus is oval or round (1) compact, rich in chromatin blocks, or (2) 

 feebly siderophilous, with a few scattered chromatin granules and a 

 well-defined nuclear membrane. There is no visible cytostome. 



* C.R. Soc. Biol. Paris, lxxv. (1913) pp. 389-91. 

 t Ceutralbl. Bakt. Parasitenk., lxxi. (1913) pp. 202-6(1 pi.). 

 t Centralbl. Bakt. Parasitenk., lxx. (1913) pp. 179-81 (1 pi.). 

 § Quart. Journ. Micr. Sci., lix. (1913) pp. 459-70 (2 pis.). 



