77H SUMMARY OF CURRENT RESEARCHES RELATING TO 



Parasite of Coast Fever.* — R. Gonder describes the asexual and 

 Bexual phases (" agamonts " and "gamonts") of Theileria parva, cor- 

 roborating Koch's conclusion that it is the parasite of coast fever in 

 African cattle. 



Developmental Forms of Trypanosoma brucei.t— George Buchanan 

 gives an account of developmental stages of Trypanosoma brucei (pecaudi) 

 in the internal organs of the gerbil {Gerbillus pygargus). He deals in 

 particular with intra-corpuscular and extra-corpuscular forms in the spleen, 

 and with stages seen in lung smears, e.g. the possible formation of the 

 so-called "latent body" of Moore and Breinl, and its metamorphosis 

 into the trypanosome. 



New Trypanosome. } — David Bruce and A. E. Hamerton, H. R. 

 Bateman, and F. P. Mackie describe Trypanosoma uniforms sp. n. from 

 oxen, goats, and sheep in Uganda. It resembles T. vivax in shape and 

 general appearance, but differs markedly in size. It also resembles 

 T. vivax in not being pathogenic to the smaller laboratory animals. 

 There is no evidence available as to what the carrier is. 



Trypanosoma nanum (Laveran).§ — David Bruce and A. E. Hamer- 

 ton, H. R. Bateman, and F. P. Mackie discuss this species which was 

 found to occur in cattle in Uganda. It is indistinguishable from 

 T. pecorum either in the living condition or when fixed and stained. 

 It differs from T. pecorum in not being pathogenic to the smaller labora- 

 tory mammals. Its carrier is unknown. 



Life-history of Trypanosoma gambiense and T. rhodesiense.|| — 

 H. B. Fantham describes non-flagellate stages, the " latent bodies " of 

 Moore and Breinl. They are especially found in the lungs, spleen, and 

 bone-marrow during periods of decrease of Trypanosomes in the 

 peripheral blood. They are in process of formation at or near the time 

 when the Trvpanosomes are most numerous in the peripheral blood. 

 The non-flagellate body contains the nucleus and blepharoplast. In its 

 formation some of the cytoplasm and the flagelluin are disintegrated. 

 They develop flagella when placed in fresh warm uninfected blood. 

 There is a life-cycle of Trypanosomes (of the above species) in Vertebrate 

 hosts (rats and guinea-pigs in Fantham's experiments), comparable to 

 those of Crithidia and Herpetomonas in the alimentary canal of various 

 Invertebrates. 



Transmission of Sleeping Sickness.f— David Bruce and A. E. 

 Hamerton and H. R. Bateman, and R. van Someren, have found 

 that Trypanosoma gambiense may retain their virulence for a period 

 of two days aft?r they are ingested by Glossina palpalis. But after the 

 Trypanosomes have been within the gut of the fly for two days, the 

 power of infecting animals with sleeping sickness, when inoculated sub- 

 cutaneously, is lost for twenty-two days. The Trypanosome in question 



* Arch. Protistenk., xxi. (1910) pp. 142-64. 



t Proc. Roy. Soc, Series B, lxxxiv. (1211) pp. 161-4 (1 pi.). 



* Proc. Roy. Soc, Series B, lxxxiii. (1911) pp. 176-9 (1 pi.). 

 § Proc. Roy. Soc, Series B, lxxxiii. (1911) pp. 180-6 (2 pis.). 

 |t Proc. Roy. Soc, Series B, lxxxiii. (1911) pp. 212-17 (1 pi.). 



* I'roc Row Soc, Series B, lxxxiii. (1911) pp. 345-8. 



