44 si MMAR1 OF CURRENT RESEARCHES RELATING TO 



species of amoebae, a flagellate amoeba, Bodo caudatus and Amoeba 

 gobanniensis sp n.. evidently closely allied to the Amoeba cucumis foupd 

 in the cucumber soil. Et seems clear that the genus Amaiba must be 

 broken up, and a step in this reform has been taken by Ohatton who 

 founded the genus Vdhlkampfia for the groupof limax-a,mceb&. It will 

 probably be found necessary to form another genus for the lamelli/podia 

 group of aincebae. 



Rhizopods and Heliozoa from Fresh-water in Holland.* — H. R. 

 Hoogenraad continues his study of the fresh-water Protozoa of Holland, 

 and deals in his report with no fewer than 86 species of such genera as 

 Amoeba, Uiftiwjiu. Arcella, Euglypha, Actinophrys, Clathrulina, and 

 t 'lathrella. 



New Phytoflagellate and its Division.! — A. Pringle Jameson 

 describes Parapolytoma satura g. et sp. n. obtained from a culture made 

 by adding to garden soil some hay-infusion which had been boiled for 

 several minutes. It has a superficial resemblance to the well known 

 Polytoma uvella, but shows constant and well marked points of difference. 

 At the obliquely truncated anterior end there is a quite unusual shallow 

 depression ; the whole body is surrounded by a substantia] pellicle ; 

 there are two flagella arising from two small basal granules situated just 

 under the membrane on the anterior end ; there is no hint of any con- 

 nexion between the nucleus and the basal granules. The nucleus is of 

 the vesicular type with a central karyosome moored by delicate achro- 

 matin strands. Round the nucleus there is a small area of very granular 

 cytoplasm, but elsewhere it is seen only as a fine meshwork surrounding 

 great masses of reserve products. One contractile vacuole was seen at 

 the base of the flagella. There is no chromatophore or eye-spot. The 

 position of the organism is in the family Chlamydomonadida-. 



Within the pellicle there is division into four daughter-individuals. 

 The division of the nucleus is described in detail. At no stage can any 

 structure be found which could be interpreted as a centriole. The 

 basal granules are of a very simple type, and are derived directly by 

 budding from the karyosome of the nucleus. 



■- 



Dermocystidium pusula Parasitic on Trout. J — J. 8. Dunkerly 



describes a stage of this parasite, which he found in a cyst on the gill 

 of Trutta fario. The stage in question consisted of a plasmodium or a 

 mass of ill-defined cells within a cyst wall. The nest stage consists of 

 a collection of distinct cells, each with a peculiar cell inclusion, and it is 

 at this stage that the individual cells or spores (?) are set free by rupture 

 of the cyst membrane. The fact that at one stage of its life-history 

 the cells of Dermocystidium exhibit characteristic cell inclusion is 

 another distinction, to be added to those enumerated by Perez, between 

 it and Blastoeystis Alexeieff . 



* Tijdschr. Nederland. Dierk. Yer., xiii. (1914) pp. 341-G9. 

 t Arch. Protistenk., xxxiii. (1914) pp. 21-44 (1 pi. and 1 fig.). 



J Zool. Anzeig., xliv. (1914) pp. 179-82. 





