THE SPOROZOA 



295 



to their own diameter. One species, M. ambiguus ( = Myxosoma ambiguum, 

 Thel.), from the urinary bladder of Lophius piscatorius. 



FAMILY 3. CHLOROMYXIDAE, Thelohan. Spores with four polar 

 capsules, and with no iodinophilous vacuole in the sporoplasm. (By 

 Gurley the name of this family is used in a different sense, and contains 

 the genera Ceratomyxa and Chloro- 

 myxum, a sub-genus of the latter being 

 Sphaerospora, which includes Myxo- 

 soma.) 



Genus 9. Chloromyxum, Mingazzini, 

 1898, with the characters of the 

 family. Six or seven species are 

 known ; type G. leydigi, Ming., from 

 the gall-bladders of various Elasmo- 

 branchs (Fig. 108, a). G. caudatum, 

 The"!., occurs in the gall-bladder of 

 Triton cristatus (Fig. 108, 6). C. 

 diploxys, Thel., infests Tortrix viridana ; 

 aberrant in the matter of habitat, this 



Species differs also from Other species 



of the genus in having the four polar 

 capsules arranged in two pairs at the Thel., x 1000. p.c, jK>iar capsules ; , su- 

 opposite extremities of the spore, like ZfJgSSSi** *"*" Pr C< "" f 

 a Myxidium with doubled polar cap- 

 sules. It should probably be regarded as a distinct generic type. 



FAMILY 4. MYXOBOLIDAE, Thelohan. Spores with one or two polar 

 capsules, and with a peculiar iodinophilous vacuole in the sporoplasm. 

 Typically tissue-parasites, only found in Verte- 

 brates, with the doubtful exception mentioned 

 above (p. 275, footnote). 



FIG. 108. 



Spores of Chloromyxidae, after Thelohan. 

 * ydigi, Ming., seen from 



FIG. 109. 



Spores of Myxobolus ellip- 

 soides, Thel. The spores on 

 the left and right are lying 

 with the sutural plane hori- 

 zontal, that in the middle 

 with the sutnral plane verti- 

 cal. (From Wasielewski, after 

 Balbiani.) 



FIG. 110. 



Spore of Myxobolus 

 miilleri, Biitschli, in the 

 fresh condition, x 1500. s, 

 sutural margin, notched ; 

 t, triangular appendix of 

 the valves. The filaments 

 of the polar capsules are 

 clearly seen. (From 

 Wasielewski, after Th6- 

 lohan.) 



Fio. 111. 



Spores of Myxobolu* (?) 

 obesus, Gurley (par. Alburnus). 

 (From Wasielewski, aftr Bal- 

 biani.) 



Genus 10. Myxobolus, Biitschli, 1882. Spore-membrane without a 

 tail-like process, with one or two polar capsules (Figs. 109-111). About 



