1899] MICROSCOPICAL JOURNAL. lOl 



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 gflass slide 3x1 some very thin Canada balsam in xylol. 

 Lower with forceps the gflass 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 rings 

 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 vegetative cells, are much 

 smaller than the other 28 gonidial cells. This find is in cr- 

 esting because of its well-developed structural and physi- 

 ological polarity. Pleodorina is intermediate between 

 Volvox and Eudorina. 



Jerusalem Mud.— Forty years ago, some samples of dry 

 mud were taken from the ancient pool of Gihon, outside 

 the Jaffa gate and sent to England. Being moistoned, six 

 new species of Entomostraca were found. Although 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 



