192 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
with its prey solely by chance. Prey which has been paralysed, and 
has become removed from the oral region of the Spathidium, is recovered 
in the majority of instances by a complex series of successively modified 
reactions, indicating “ sensing at a distance.” The factor involved in 
“ sensing at a distance ” is apparently a substance secreted by the 
Spathidium when the prey is paralysed. J. A. T. 
New or Rare Flagellates.— A. Pascher ( Archiv . Protistenkunde, 
1921, 44, 119-42, 10 figs. ; 1922, 44, 397-407, 13 figs.). Descriptions 
of numerous forms, e.g. species of Mallomonas , Platymonas , Reckertia , 
Thaurilens , Solenicola, Ghrysococcus, Uroglenopsis, Dinobryon , Dicer as, 
Styloceras, Pseudomall omonas and Bernardinella. Over sixty different 
forms are dealt with which are new or little known. J. A. T. 
Australian Fresh-water Flagellates.— G. I. Playfair ( Proc . Linn. 
Soc., 1921, 46, 99-146, 9 pis., 3 figs.). A description of a multitude 
of forms, which should perhaps be referred to Algae. The list includes 
172 forms in 39 genera, 105 species, 62 varieties, and 5 “forms.” Of 
these there are 43 species, 48 varieties, and 5 “forms ” which may be 
called new. There is a very rare type requiring a new genus, Scintilla. 
J. A. T. 
Folliculina boltoni.— Ricardo Thomsen {Archiv. Protistenkunde , 
1921, 44, 83-98, 17 figs.). Corroboration of the report of Kent and 
Penard that there is a fresh-water species of Folliculina (. F . boltoni ), 
and that it occurs in localities so widely apart as Europe and Uruguay. 
There is a membrane covering the large “ wings,” the only case in 
Stentoridae. But what Mobius described and drew as a membrane 
consists of membranellae, which hold the food-particles in the gullet 
and drive them further in. J. A. T. 
Trichomonas of Guinea-pig. — E. C. Faust ( Archiv . Protistenkunde, 
1921, 44, 114-8, 1 pi., 1 fig.). A description of Trichomonas flagelli- 
phora sp. n., found in the intestine of the guinea-pig, but different from 
T. cavise in having a smaller body, a longer axostyle, longer undulating 
membrane and flagellar filament. The long anterior flagella and the 
presence of chromatic granules along the axostyle are likewise specific. 
J. A. T. 
Studies on Chrysomonads. — F. Doflein ( Archiv . Protistenkunde, 
1922, 44, 149-213, 5 pis., 3 figs.). A detailed study of Ochromonas 
granulans Dofl., dealing with its nutrition, behaviour in different 
cultures, division, basal corpuscles, nucleus, and cysts. Special attention 
is devoted to the nucleus, its two chromosomes, the karyosome, the 
formation of the spindle, and the basal granules from which the flagella 
grow out. The second part of the paper deals with Ghrysamccba radians 
Klebs, with its flagellate, amoeboid, and encysted phases. J. A. T. 
