1004 SUMMARY OF QUERENT RESEARCHES RELATING TO 



by Saville Kent, but collected in masses at the bottom. A sufficient 

 quantity was thus obtained to extract the colouring matter by alcohol 

 in suitable quantities for examination, the result being the separation 

 out of chlorophyll with smaller quantities of xanthophyll, as tho 

 author has done in the case of Euglena. 



Flagellata.* — Dr. A. Seligo communicates the results of his 

 studies of certain flagellate infusorians, which he arranges in the 

 following system : — 



I. Amoeboniastigoda (Monadina). 



1. Monomastigoda. — Cercomonas longicauda Duj. 



Mastigamceba aspera F. E. Sch. 



2. Heteromastigoda. — Bodo lacertse Grassi sp. 



Bodo limbatus n. sp. 



3. Polymastigoda. — Hexaniitius intestinalis Duj. 



Trichomonas batrachorv/m P. 

 Gyromonas ambulans n. g. 

 II. Choanomastigoda. — Salpingaica ampulla S.K. 



III. I'hytomastigoda (Volvocina in widest sense). — Ptcromonas alata 



Cohn sp. 



IV. Ochetomastigoda (Arthrodela). 



Peridinieae. Glenodinium Cohnii n. sp. 

 V. Stomatomastigoda (Euglenoidina). 



1. Astasieaa. — Astasiopsis distorta Duj. 



Bhabdomonas incurva Fres. 

 Menoidium pellucidum P. 

 Heteronema acus E. 

 Petalomonas abscissa Duj. 



2. Anisonemina. 



Entosiphon sulcatum St. 

 Plozotia vitrea Duj. 



His results show that the Flagellata may be adapted to very varied 

 environment. Plceotia vitrea frequents the oxygenated surface, and 

 seems almost fitted for pelagic life. In scarcity of oxygen it rapidly 

 dies. Glenodinium Cohnii occurs in very stagnant sea-water, where it 

 is quiescent and reproduces in a palmella-like fashion. In clean 

 water swarm-spores appear. Ampulla developes on the surface of 

 stagnant sea-water, on the mouldy pellicle of organic and inorganic 

 elements. Bodo limbatus attacks the first products of the decom- 

 position of dead marine organisms, becoming quiescent when these 

 are exhausted. The parasites Hexaniitius intestinalis, Trichomonas 

 batrachorum, and Bodo lacertse are distinguished from one another. 

 The other Flagellata noted are fresh-water marsh forms. With the 

 exception of Pteromonas they feed on decomposing plants, &c, or the 

 Bacteria which infest these. Mastigamceba and Petalomonas devour 

 algse. The Flagellata seem to be very ubiquitous. 



The body is enveloped in a fine cuticle, structureless or striated, 



* Beitr. zur Biol, d, Pflanzen (Cohn), iv. (1880) pp. 145-80 (1 pi.). 



