332 Myxosporiclia 
Sphaeromyxa longa sp. n. (Fig. 4). Host: Gadus minutus. Habitat: Gall 
bladder. Spore: 20/x x 5 jjl, similar in form to that of S. balbianii Thel., but 
much longer and from a different host. This form was compared with S. bal¬ 
bianii which was obtained from Onos mustela and the S. balbianii spores were 
consistently smaller, 1 6 jjl x 5 p. There was very little variation in the size 
of spores in either case when carefully measured, not more than 1-5/x in length. 
S. longa was found in association with Myxidium sphaericum Thel., the spores 
of S. longa being more numerous than those of M . sphaericum. 
Sphaeromyxa ovata sp. n. (Fig. 5). Host: Onos tricirratus. Habitat: Gall 
bladder. Spore: 13/x x 6-5/x, oval with round ends, some slightly curved in 
one plane, polar capsules large, terminal. This form resembles Cystodiscus 
Fig. 4. Sphaeromyxa longa sp. n. x 1500. 
Fig. 5. Sphaeromyxa ovata sp. n. x 1900. 
b 
Fig. 6. Chloromyxum quadratum. (a) Spore from above. (6) Spore with polar 
filaments extruded, x 1900. 
immersus Lutz parasitic in Amphibia, but C. immersus is said to be 9-10/z 
wide. Occasionally an abnormal spore of S. ovata can be found measuring 
10 p x 8p, which is nearer the proportions of C. immersus , but is smaller. 
Georgevitch describes this form as a polymorph of S. balbianii, but no spores 
of S. balbianii were found in the three specimens of Onos tricirratus containing 
S. ovata . One out of 46 specimens of Onos mustelus showed a slight infection 
by this parasite, spores being very rare. This specimen was not infected 
with S. balbianii. 
Chloromyxum quadratum Thel. A figure of Chloromyxum quadratum from 
the muscles of Cottus bubalis is subjoined to show the extruded polar filaments 
and the four polar nuclei (Fig. 6). 
