CHLOEOPHYLL COEPUSCLES OF SOME INFUSOEIA. 167 



larger. They vary in size from "0025 mm. to *0075 mm. in 

 diameter. They are present in great numbers throughout the 

 endopiasm, and circulate in the streaming protoplasm. 



Vaginicola grandis. — The corpuscles are fairly numerous. 

 They are scattered in the endoplasm. In size, form^ colouring 

 and division they resemble those of Paramecium burs aria 

 (fig. 14). 



Vorticella chlorostigma. — No corpuscles are present. 

 The chlorophyll is apparently diffused through the endoplasm 

 which is very transparent.^ Its colour is a very delicate green. 

 It appears loosely held by the protoplasm ; slight pressure 

 causes the colour to disappear. It is quickly dissolved by 

 alcohol. 



In another Vorticella which resembles Vorticella cam- 

 panula, but which I have been unable to identify, I haAe 

 found corpuscles of the typical form. They are numerous and 

 circulate in the endoplasm. The chlorophyll is bright green. 



Phacus. — I have examined Phacus triqueter, Phacus 

 longicaudis, and Phacus glabra." 



In each of these forms the chlorophyll is contained in cor- 

 puscles which agree in general structure with those of the 

 above-mentioned Ciliata. They are, however, more fragile, 

 and the colour is a very pale green. They vary in size from 

 •0025 mm. to '0075 mm. in diameter. The separate corpuscles 

 are readily seen in Phacus triqueter and Phacus longi- 

 caudis lying beneath the cuticle (fig. 15). In Phacus glabra 

 they are usually quite obscured by several large amylaceous 

 bodies, and the chlorophyll appears diffused until the cor- 

 puscles are set free by pressure. 



Euglena. — In Eugleua acus and Euglena oxyuris 

 (figs. 19 — 21) the chlorophyll corpuscles are numerous. They 



1 Professor Engelniaun, of Utrecht, Las also recently described a Vorticella 

 in which the chlorophyll is diifused throughout the protoplasm, and is not 

 localized in corpuscles. This mode of occurrence of animal chlorophyll once 

 and for all disposes of Brandt's assumption that chlorophyll in animals is 

 always due to parasitic Algse. — E. R. L. 



^ A recently discovered Phacus, sent to me by Mr. Bolton. 



