& 



490 SUMMARY OF CURRENT RESEARCHES RELATING TO 



The author discusses the dual nature of the terminal chamber and other 

 peculiarities in Cyrribalopora bulloides, and the excavating capabilities 

 of ( '. tabellseformis, which appears to form crypts in fragments of 

 Molluscan shell. He goes on to submit evidence of the purposiveness 

 and "intelligence" of some of the Foraminifera which select for shell- 

 making specific kinds of material and use it in an extraordinarily 

 effective way. 



Studies on Parasitic Protozoa.* — Doris L. Mackinnon gives a 

 more complete diagnosis of the Flagellate genus Embadomonas, from 

 the intestine of the larvae of the crane-fly and Trichoptera. The genus 

 contains small slipper-shaped Flagellates, characterized by a very large 

 cytostome bordered by prominent lips, which are more or less sidero- 

 philous, and two flagella, not so long as the body, one acting as an 

 organ of locomotion, and the other lying in the cytostome. The 

 spherical nucleus is placed at the anterior end of the cell ; the two basal 

 granules, from which rise the flagella, lie at the anterior border of the 

 cytostome. There is a definite periplast, which prevents deformation of 

 the cell. The anterior part of the cell shows a well-marked torsion. 

 The cysts are relatively small and are ovoid in form. As " species 

 characters " may be used : (1) the form of the animal, (2) the nature of 

 the periplast, (3) the degree of development of the cytostome and its 

 lips, and (4) the size of the cysts. Two species are described. The 

 genus Embadomonas is certainly allied to Chilomastix Alexeieff and to 

 Fanapepea Prowazek. The author also describes multiplication cysts of 

 a Trichomastigine in Tipula. 



Klossiella muris.j — A. C. Stevenson discusses this parasite from the 

 kidney and renal arterioles of the mouse. A stage showing schizogony 

 into merozoites is described. Another type of schizogony of more 

 frequent occurrence shows fifty to sixty daughter individuals. The 

 merozoites seem to enter the cells of the convoluted portion of the 

 kidney as gametocytes or gametes. Fusion or association of two garne- 

 tocytes takes place, and after this repeated nuclear division. Twelve to 

 sixteen sporoblasts are formed. A cyst-wall forms round the sporoblast 

 and the nucleus divides to form sporozoites. The capsule bursts and 

 the spores travel to the bladder or into the urine. 



* Quart. Journ. Micr. Sci., lxi. (1915) pp. 105-18 (1 pi.). 

 f Quart. Journ. Micr. Sci., lxi. (1915) pp. 127-35 (1 pi.). 



