682 SUMMARY OF CURRENT RESEARCHES RELATING TO 



real life-history and biology, but must be accepted as normal phases 

 only with the greatest caution." The facts, as far as known, regarding 

 the Leishmann-Donovan body, and artificially-produced developmental 

 forms, are clearly stated. This parasite, it is concluded, most probably 

 has at some period or another a typical trypaniform phase. On the 

 question of the nature of the Spirochaatae, the author agrees with 

 Schaudinn (1) that the organisms exemplified by Spirochceta plicatilis 

 Ehrenberg are to be widely separated from Trypanosoma ziemanni 

 Schaudinn — and equally, of course, from other Trypanosomes — with which 

 they have at most only a very remote phylogenetic connection ; and (2) 

 that, at any rate, certain other spirilliform parasites, e.g. Spirochceta 

 refringens and S. {Trypanosoma) balbianii agree fundamentally in struc- 

 ture with S. plicatilis, the type species. Where exactly amongst micro- 

 organisms Spirochceta is to be placed, e.g. how close to or distant from 

 Spirillum, is not discussed ; the available evidence, the author thinks, 

 is against this form having anything to do with the parasitic Flagellates. 

 It would appear that the parasites hitherto grouped together under 

 the general heading of Spirochagtae include two quite distinct types 

 of organism. Spironema pallidum Schaudinn (= Trypanosoma litis 

 Krzysztalowicz and Siedlecki) of syphilitic lesions, is allied, not to the 

 Spirochaatae, but rather to the Flagellates, possessing as it does, in 

 certain phases at least, markedly trypaniform characters. Further 

 careful investigation of all the forms (including, e.g. " Spirochceta " ober- 

 meieri and " #." anserina) is necessary with a view to their correct 

 classification. An exhaustive bibliography accompanies the paper. 



p Myxobolus from Head of Haddock.* — M. Auerbach describes 

 Myxobolus cegleftni sp. n. from the head of Gadus ozglefinus. It closely 

 resembles 31. mUlleri Biitschli, but seems to be distinct. 



Blood-inhabiting Protozoa. f — Muriel Robertson discusses Trypano- 

 soma brucei (in the guinea-pig) ; T. pythonis sp. n. from an African 

 python ; a Trypanosome found in the blood of Pleuronectes platessa, and 

 P.flesus, a Hasuiogregarine from the same hosts ; T. raice Laveran and 

 Mesnil from Raia microcellata ; and a Hasmogregarine from the same fish. 



"^New Myxosporidian from the Tench.f — Louis Leger has found in 

 Tinea vulgaris what seems to be a new species of Chloromyxum (C. 

 cristatum). It occurred in fishes which were much infested with 

 Chilodon cyprini. 



] New Trypanosome.§ — A. Laveran describes Trypanosoma cazalboni 

 sp. n., from Nigeria. It occurs in Equidae and Bovidas ; it is readily 

 inoculated into sheep, goats, and antelopes ; it is not usually introducible 

 into mice, rats, guinea-pigs, or dogs. It seems to be disseminated by 

 species of Tabanus. 



Spleen Emulsion as an Antagonist of Nagana Trypanosomes 

 Introduced into Dogs.|| — G-. Roux and L. Lacomme find that when 



* Zool. Anzeig., xxx. (1906) pp. 568-70 (4 figs.). 



t Proc. R. Phys. Soc. Edinburgh, xvi. (1906) pp. 232-47 (2 pis ). 



% Comptes Rendus, cxlii. (1906) pp. 1097-8.' 



§ Op. cit. cxliii. (1906) pp. 94-7. I] Tom. cit., pp. 135-7. 



