622 SUMMARY OF QUERENT RESEARCHES RELATING TO 



In another paper Chatton* describes Leptomonas roiibaudi sp. n. 

 from the Malpighian tubes of Drosophila confusa Stae^'er. Its characters 

 are intermediate Ijetween Leptomonas and Cercoplasma. In its life- 

 history, which is monophasic, it approaches L. legerorum, in which the 

 monad stage is often so ephemeral that it passes unperceived. This 

 stage is still undiscovered in L. rouhaudi. 



In a third paper, E. Chatton and P. Delange f report the occurrence 

 oi hoih. Leptomona>^ 2^'^^^oni {^m\\^\&) and Trypanosoma lewisii (Kent) 

 in the adult and larva of the rat flea, Ceratophyllus fasciatus. 



Genus Leptomonas Kent.l — Edward Hindle discusses the history of 

 Leptomonas, Be/petomonas, and Crithidia in the hope of ending the con- 

 troversies which beset the application of any one of these names. It 

 seems, however, that we must wait until the life-history of the type 

 species Leptomonas Initschlii (from the gut of Trilohus gracilis') has been 

 worked out. 



New " Crithidia." §—E. Hindle and R. C. Lewis describe ''Crithidia'' 

 cleti sp. n., a Flagellate from the alimentary canal of a Hemipterous 

 insect from Pretoria, Cletus varius Ball. They describe the pre-flagellate, 

 flagellate, and post-flagellate forms, and refer the species provisionally 

 to the genus Crithidia in Patton's sense. The new form is not a stage 

 in the life-cycle of any trypanosome occurring in the blood of Vertebrates, 

 for its host feeds entirely on the juices of plants. 



Parasitism and Affinities of Euglenids.|| — A. Alexeieff refers to 

 cases of parasitism in Euglenids. Thus De Beauchamp has described 

 Astasia captiva in CatenuJa lemnse, and Rehberg Lagenella mobilis 

 ( = Astasia mohilis) in Cyclops, where it may occur even in the embryos 

 within the ovigerous sac. There seems to be general agreement that 

 Sporozoa in the strict sense must be traced back to a Flagellate origin, 

 and Alexeieff thinks that the Euglenids are near the source. He sup- 

 ports this view with reference to various divisions of the Sporozoa. He 

 regards the Euglenids as a strong and vast stem, whose branches are 

 represented by Herpetomonadidse ( = Trypanosomidte), Bodonida3, Cocci- 

 diaus, Gregarines, Ha^mogregarines, and Sarcosporidia. Probably other 

 branches lead to Ciliata, Peridinians, and Cystoflagellates. Therefore an 

 extraordinary interest attaches to the study of EugleniJs. 



New Order of Infusorians.f — Romuald Minkiewicz found at Roscoff 

 a remarkable ciliated Infusorian with a strongly developed opaque 

 chromatophore, blue yellow, green, or uncoloured. It lias a spiral trans- 

 verse groove serving for the insertion of typical cilia, and at first sug- 

 gested a (xymnodinian. Hence the name proposed, Gynmodinioides g. n. 



* C.R. Soc. Biol. Paris, Ixxiii. (1912) pp. 289-91 (11 figs.). 

 + C.R. Soc. Biol. Paris, Ixxiii. (1912) pp. 291-4 (17 figs.). 

 X Parasitology, v. (1912) pp. 128-34. 

 § Parasitology, v. (1912) pp. 109-113 (17 figs.). 



11 Arch. Zool. Exper., x. (1912) Notes et Revue, No. 4, pp. Ixxiii.-lxxxviii. 

 (3 figs.). 



f Comptes Rendus, civ. (1912) pp. 513-16. 



