ON THE CLASSIFICATION OF THE MYXOSPORIDIA. 
409 
the division certainly can not rest upon such a comparatively unimportant character 
as the shape of the spore. I have regarded this division as of ordinal value and 
define the two orders thus: 
I. Cryptocystes ord. nov. Myxosporidia in which the pansporoblast produces many 
(at the fewest 8) spores; the last minute, without distinct symmetry, with a single 
capsule; type (and only) family, Glugeidce fam. nov. 
Etymology: xpunroc;, concealed; z/kn?, capsule. 
II. Phcenocystes ord. nov. Myxosporidia in which the pansporoblast produces few 
(at the most 2) spores;* the last relatively large, with distinct symmetry and 2 or 
more capsules;! type family, Myxobolidce fam. nov. 
Etymology: ya:Vw, I appear; xuans, capsule. 
I. CRYPTOCYSTES ord. nov. 
GLUGEIDiE fam. nov. 
Glugeidees Thdlohan, 1892, Bull. Soc. philomat. Paris, iv, pp. 173-174. 
Definition (provisional as regards negative characters) : Cryptocystes destitute of 
a bivalve shell; with the capsule at the anterior extremity and with an aniodinophile 
vacuole; type genus, Glugea Thelohan. 
This family contains three genera, | whose relations are shown in the following 
table : 
Myxosporidium . 
Spores formed in pansporo- 
blast. 
Pansporoblast membrane. 
Genera. 
Present 
Absent 
Inconstant, numerous 
Inconstant, numerous 
Not subpersistent 
Subpersistent 
Glugea Thelohan. 
Pleistopliora gen. nov. 
Tlielohania Henneguy. 
GLUGEA Thelohan, 1891. 
Compt. Rend, hebdom. Soc. Biol. Paris, in, p. 29; ib. Thelohan, 1892, Bull. Soc. philomat. Paris, 
iv, p 174. 
Definition : Glugeidce possessing a myxosporidium, and in which the pansporoblast 
produces an inconstant but large number (always more than 8) of spores ; pansporo- 
blast membrane not subpersistent; type, G.microspora Thel. (synonym for G. anomala 
Moniez). 
Glugea anomala Moniez, 1887. 
Nosema anomala, Compt. Rend. Acad. Sci. Paris, civ, p. 1312; Glugea micro sp or a, Th61ohan, 1891, 
Compt. Rend, hebdom. Soc. Biol. Paris, in, p. 29. 
Glugea destruens Thelohan, 1892. 
Bull. Soc. philomat. Paris, iv, pp. 165, 174 (footnote). 
* Three asserted in one species (Leydig, Muller’s Archiv., 1851, p. 229). 
t Except (at most) two Myxobolus species (one of them perhaps inconstantly), which have suffered 
reduction to one. 
t Thelohan recognizes only 2 genera, the distinctions between which are mainly based upon 
the three characters noted. If (as both he and I believe) these characters are sufficient to determine 
genera at all, a third genus must be recognized, as Pleistopliora typicalis sp. nov. could not (as the above 
table shows) well be forced into either of the existing ones. 
