1899] MICROSCOPICAL JOURNAL. 101 



may be used to render the object transparent. Discon- 

 tinue when sufficiently transparent. 



To mount. Still wet with xylol, collodion side up, place on 

 a glass slide 3x1 some very thin Canada balsam in xylol. 

 Lower with forceps the glass slip, object-side down into its 

 final position. When the balsam is dry, clean, polish and 

 label the slide. 



BIOLOGICAL NOTES. 



New Alga. — An ellipsoidal coenobium, about 1-200 inch 

 long-, containing- 32 biflag-ellate cells arrang-ed in five ring's 

 around the periphery of the hyaline g-elatinous matrix is 

 called Pleodorina illinoisenses by Kofoid. Like other Vol- 

 vocineae, one pole of the colony is always directed for- 

 ward during- locomotion. They differ from those at the 

 posterior pole being- provided with larg-er red pig-ment 

 spots. Four of them, called veg-etative cells, are much 

 smaller than the other 28 g-onidial cells. This find is in er- 

 esting- because of its well-developed structural and physi- 

 ological polarity. Pleodorina is intermediate between 

 Volvox and Eudorina. 



Jerusalem Mud. — Forty years ag-o, some samples of dry 

 mud were taken from the ancient pool of Gihon, outside 

 the Jaffa g-ate and sent to Eng-land. Being- moistoned, six 

 new species of Entomostraca were found. Althoug-h dried 

 and moistened for eight years in succession, the species 

 could still be found alive. 



Ameba. — A new Rhizopod parasite of man has been 

 found in abundance in the serous fluid-accumulation of the 

 peritonal and pleural cavities of man in a case of peritoni- 

 tis. It is called Amoeba miuria. 



BACTERIOLOGY. 



Are Bacteria Fungi ? — Dr. Johan-Olsen says they are 

 one stage in the development of fungi. He cites the species 

 of Oospora. When their tenuous hypha? break up into 

 conidia, the latter closely resemble rod-shaped bacteria in 



