522 Transactions. 



leturned, the organism as I had observed it had disappeared. 

 In its place were many active flagellulae, each with a well- 

 marked nucleus and a large vacuole, non-contractile (Plate XXVI, 

 fig. 5). The body of a flagellula is pear-shaped, with a long 

 flagellum at the posterior end. Nothing like an eye-spot is. 

 visible. These flagellulse aggregated in places into small 

 masses, losing their activity but not becoming fused. In con- 

 nection with these quasi-plasmodia, or often not in connec- 

 tion with them, the flagellula^ formed into long strings and 

 loose networks. In this stage the resemblance to the fibres 

 and spindle cells of Lahyrinthula is unmistakable. I did not,, 

 however, observe any spindle cells that moved along the 

 threads. 



I am not, of course, sm-e that the plasmodium-like body 

 that I have called Myxoflasnia broke up into flagellulse. I am 

 certain only that these appeared after Myxoflasma had dis- 

 appeared, and that they united to form the Labyrinthula-]\ke 

 network. The network remained unaltered until I came ta 

 town, bringing it with me for permanent preparation. 



The average long diameter of Myxoplasma is about 0"15 mm. 



EXPLANATION OF PLATES XXV AND XXVI 



Plate XXV. Amoeba agilis. 



Figs. 1-27. Actively dividing form, drawn at intervals of 30 seconds. At 



fig. 27 division is complete. 

 Figs. 28-46. Actively moving form with tapering pseiidopodia. Drawn at 



intervals of 25 seconds. 

 Figs. 47-49. A diatom passing through the body. Total time, 49 seconds. 



Plate XXVI Myxoplasma rete. 

 Figs. 1-3. A specimen drawn at 3.5(5 p.m., 4.3 p.m., and 4.10 p.m. At a 



is a diatom. 

 Fig. 4. Network of flagellulse. possibly not connected with Myxoplasma, 

 Fig. 5. Active flagellulse. 



