292 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 
PLATE 5. 
Figs. 1-11. Genus incert. sp. 6 (after Schewiakoff. x 1). 
1-3. Developmental stages of the plasmode. x 1500. 
4, Encystment. X 1500. 
5. Cyst-tube with spores. > 1500. 
6. A ruptured cyst with emerging spores. X 1500. 
7. Spores sessile on the muscles. X 1500. 
8. Individual spore. x 2600. 
9. Small plasmatic corpuscles proceeding from the spores. X 2600. 
10a-l. Transverse division of the spore; the nucleus dividing karyokinetically. 
x 2600. 
1la-b. Conjectural conjugation stages of the spores. X 2600. 
PLATE 6. 
Fig. 1. Genus incert. sp. 9 (after Lieberkiihn in Biitschli. Xx 3). XX about 195. 
Myxosporidium from the gall bladder of Lota lota. 
Fig. 2. Genus incert. sp. 10 (after Lieberkiihn in Biitschli. Xx #). X about 195. 
Myxosporidium from branchiz of Lota lota with a very thick ectoplasm. 
Figs. 3-8. Genus incert. (‘‘ Myxosporidium”’) congri (after Perugia. X 1). 
3-4. Two forms with “ vacuoles.” 
6. An individual attached to a vegetable filament. 
PLATE 7. 
Figs. 1-3. Genus incert. sp. 12 (after Linton. X 1). 
1. Notropis megalops with dermal cysts caused by ‘‘psorosperms.” XX 1}. 
2. Spores from cysts, highly magnified. 
2a. Vertical view of spores in caustic potash. 
2a’. Same, more highly magnified. 
2b. Transverse view of spore. 
2b’. Same, more highly magnified. 
2c. Spore treated with sulphuric acid. 
3. Portion of thin section of cyst: a, pigment spot; b, granular protoplasm; 
c, spores; d, wall of cyst and dermis. xX about 150. 
Fig. 4. Genus incert. sp. 13 (after Lieberkiihn. X #). 
4a. Spores from a subcutaneous cyst of Gasterosteus aculeatus. X 870. 
4b-e. The same in different stages of development; b, spore with plain ‘‘nucleus” 
of usual size; ¢, d, with smaller ‘‘ nncleus;” e, ‘‘ nucleus” scarcely per- 
ceptible, the previously plain membrane no longer visible, animal 
mature. 
Fig. 5. Sarcosporidian spore of sheep with a ‘“‘cansnie” (after Pfeiffer. x 1). 
PLATE 8 
Figs. 1-4. Genus incert. ( ‘‘ Myxosporidium™ ) bryozoides (after Korotneff. X 1). 
1. Fie le of Alcyonella fungosa, with the spermatozooids and the parasite on 
them. x 350. 
2. A parasite inclosed in an Alcyonella zooid. xX 350. 
3,4. Creeping adults with nuclei and spores. X 750. 
PLATE 9. 
Figs. 1-4. Genus incert. (‘‘ Myxosporidium”) bryozoides (after Korotneff. Xx 1). 
la. Group of spermatoblasts, 2 of them containing very young stages of the 
parasite. x 900. 
1b-d. Different stages in the conversion of a spermatoblast into a plasmode; 
cell nuclei and parasite nucleishown. X 900. 
le. Plasmode in which 1 daughter, and 2 granddaughter cell nuclei are visible. 
Nuclei of parasite numerous. 900. 
2. A plasmode in which the cell nuclei are atrophying and possess a jagged con- 
tour. xX 900. 
3. Spores in which vacuoles and urticant organs are to be distinguished. xX 900, 
4. Nuclei of the parasite of plate 8, fig. 3. 
