32 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 

 3. Myxidium Sp. ? 



The myxosporidium of this rare parasite was not seen in fresh preparations 

 of the bile. In stained smears there occurred a large spheroidal myxosporidium 

 containing twenty-two nuclei, and having numerous long lobose pseudopodia on 

 one side. The general arrangement of the pseudopodia suggested that they served 

 for the attachment of the myxosporidium to the gall bladder. It contained no 

 spores. 



The pansporoblasts are spherical 1.5-16 n. in diameter. 



a 



Fig. 3 



Fig. 3. Spores of Myxidium sp. from Pseudopleuronectes americanus. o, with 

 polar filament extruded by ammonia water. X 660 b X 1320. 



The spores (Fig, 3) are spindle shaped with the long axis slightly bent in the 

 form of an S. The polar capsules are pear-shaped and situated at either end of 

 the spindle. The polar filaments were visible in the fresh state within the capsule. 

 The polar filaments were extruded in ammonia water (Fig. 3, a). 

 The dimensions of 'a typical spore are: 



Length 14-15 n. 



Width &-7 .5 A«. 



Length of polar capsule 4 /x. 



Width of Polar capsule 2.5 /x. 



Length of extruded polar filament 90-95 m- 



This species of Myxidium was found in the gall bladder of Pseudopleuronectes 

 americanus on the coast of New Brunswick, Canada. 



The spores found resemble most closely those of M. bergense Auerbach (:09, 

 p. 74 and '09*. p. 61) but differ from these by their small size and longer polar 

 filaments. They resemble also the spores of M. sphericum Thel. but differ in the 

 relatively smaller polar capsules (Thel. '95, PI. 7, Fig. 28) and the longer polar 

 filaments. 



4. Myxosporidium of an undetermined species. 



Attached, usually in large numbers, to the epithelium of the gall bladder in 

 Urophycis chuss, occurs a spherical or ellipsoidal myxosporidium which in stained 

 preparations is found to contain numerous nuclei (PL IV, Figs. 6-8). The 

 examination of a large number of these myxosporidia has not revealed the presence 

 of any developing spores in them. Very often clusters of C. acadiensis are found 



