378 C. H. MARTIN. 
Part II.—The Life Cycle of Tachyblaston ephelotensis 
(Gen. et spec. nov.), with a possible identification of 
Acinetopsis rara, Robin. 
ConrENTS. 
PAGE 
I. Introductory . : : : - ols 
Il. The Budding of Ephelota gemmipara_. . “S78 
Ill. Tachyblaston ephelotensis . , . 380 
IV. Literature : . : : . 387 
V. Explanation of Plates, illustrating Parts [ and II . 388 
I. Intrropvuctory. 
In this part I wish to describe a new Acinetarian parasite 
—Tachyblaston ephelotensis (Nov. Gen. Nov. Spec.), 
which I found during a visit to Naples in May, 1908. I 
should like to take this opportunity of thanking the staff of 
the Aquarium for their kindness. 
The early observers of parasitic Acinetaria regarded these 
animals as the embryoes of their host, and it was not until 
1860 that Balbiani put forward the view that the so-called 
embryoes were really parasites. The truth of this theory 
was first shown by Metchnikoff in his early work on 
Spherophrya parameciorum in the ‘Archiv fir 
Anatomie und Physiologie’ in 1864, to which he again refers 
in his classical work ‘ Lecons sur la Pathologie Comparée de 
Inflammation’ (Paris, 1892). Metchnikoff showed that in 
this case the internal parasite divided, giving rise to 
tentacled buds, which, after developing cilia swam off and 
infected another host. It had frequently been suggested 
that certain rounded bodies found in Acinetaria were to be 
regarded as parasites, but this view has, as far as I am 
aware, never been confirmed, and Biitschli says in his account 
