292 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 



Plate 5. 



Figs. 1-11. Geftu.9 hiccrf. sp. 6 (after Schewiakoff. X 1). 

 1-3. Developiiu'utal stages of the plasniode. X 1500. 



4. Eucystment. X 1500. 



5. Cyst-tube with spores. X 1500. 



6. A ruptured cyst with emerging spores. X 1500. 



7. Spores sessile on the inuseles. X 1500. 



8. ludividunl spore. X 2600. 



9. Small plasmatic corpuscles proceeding from the spores. X 2G0O. 



10«-/. Transverse division of the spore; the nucleus dividing karyokinetically. 



X 2600. 

 llo-fc. Conjectural conjugation stages of the spores. X 2600. 



Plate 6. 



Fig. 1. Getnts incert. sp. 9 (after Lieberkiihn in Biitschli. X 3). X about 195. 



Myxosporidium from the gall bladder of Lota Iota. 

 Fig. 2. Genua incert. up. 10 (after Lieberkiihn in Biitschli. X §). X about 195. 



Myxosiioridium i'rom branchi:e of Lota lota with a very thick ectoplasm. 

 Figs. 3-8. Genns incert. ("Myxosporidium") congri (after Terugia. x 1). 

 3-4. Two forms with "vacuoles." 

 6. An individual attached to a vegetable lilament. 



Plate 7. 



Figs. 1-3. Genus incert. ap. 12 (after Linton. X 1). 



1. Notropis megalops with dermal cysts caused by "psorosperms." X 1^. 



2. Spores from cysts, highly niagniHcd. 



2a. Vertical view of 8])ores in caustic potash. 

 2a'. Same, more highly maguilied. 

 2b. Transverse view of spore. 

 2b'. Same, more highly maguilied. 

 2c. Spore treated with sulphuric acid. 



3. Portion of thin section of cyst: a, pignuHit spot; h, granular protoplasm; 



c, spores; d, Avail of cyst and dermis. X about 150. 

 Fig. 4. Genus incert. sp. 13 (after Lieberkiihn. X f ). 



4a. Spores from a subcutaneous cyst of Gasterosteus aculeatus. X 870. 

 ib-e. The same in different stages of develo]unent; 6, spore with plain "nucleus'' 

 of usual size; o, d. with smaller "nucleus;" e, "nucleus" scarcely ])er- 

 ceptihle, the previously plaiu membrane no longer visible, aniuuil 

 mature. 

 Fig. 5. Sarcosporidiau spore of sheep with a " cai)sulo " (after Pfeiffer. x 1). 



Plate 8. 



Figs. 1-4. Genus incert. ( "Myxosporidium" ) hryozoides (after Korotneff. X 1). 



1. I'lnicio of Alcyonella funqosa, with the spermatozooids and the parasite on 



them. X 3.50. 



2. A parasite inclosed in an Alcyonella zooid. X 3.50. 

 3, 4. Creeping adults with nuclei and spores. X 750. 



Plate 9. 



Figs. 1-4. Genus incert. {" Myrosporidiam") hryozoides (after Korotneff. X 1). 



la. Grou]) of spermatoblasts, 2 of them containing very young stages of the 

 parasite. X 900. 



Ib-d. Difierent stages in the conversion of a spermatoblast into a plasmode; 

 cell nuclei and parasite nuclei shown. X 900. 



le. riasmoile in wliich 1 daughter, and 2 granddaughter cell nuclei are A'isible. 

 Nuclei ol' ]>arasite numerous. X 900. 



2. A ]dasmode in whieli t lie cell nuclei are atroi)hving and jjossess a jagged con- 

 tour. X 900. 



!). .S]ior(^8 in which vacuoles and tirticant organs ;ire to be distinguished. X 900. 



4. ^uclei of the parasite of jilate 8, (ig. ;.I. 



