139 
Sporangium without a columella, with gelatinizing membrane. Zygospores single 
and completely inclosed in a receptacle (carposporium) like a small tuber. 
2. Suborder. Conidiopliorae. 
1. Family. Clisetocladiaceae. 
Conidia single, spherical, in groups on the middle swollen part of the last branches 
of the copidiopliore, the ends of the same remaining tenuous and sterile. Zygospores 
naked between the straight gametes. 
2. Family. Ceplialidacese. 
Conidia in chains on the splierical-headed, swollen branch ends (sterigmata) of the 
unbranched conidiopliore. Zygospores naked on the crown of the tongs-like gametes. 
2. Order. Entomoplithorime. 
1. Family. Entomophthoraceae. 
With the characters of the order, i. e., Mycelium mostly parasitic in living animals, 
rarely in plants, or saprophytic, richly branched, often falling into pieces, at first 
0 ne-celled. Nonsexual reproduction by conidia which are delimited on the end of 
unbranched threads growing out of the substratum and thrown off when ripe, i. e., 
no special conidiopliores. Zygospores on the mycelium. 
Under the third series he gives: 
1. Order. Saprolegninae. 
1. Family. Saprolegniaceae. 
Antheridia applied to the oogonium like accessory branches, pushing fertilization 
tubes into the latter. 
2. Family. Monoblepharidaceae. 
Antheridia with spermatozoids. 
2. Order. Peronosporime. 
1. Family. Peronosporaceae. 
With the characters of the order, i. e., mycelium parasitic in the interior of living 
plants, richly branched, polycarpal. Nonsexual reproduction by swarm spores or 
conidia, mostly with specially formed conidiopliores breaking out of the substratum- 
Oogonia always one-celled, with a remnant of unused protoplasm (periplasma). 
Antheridia applied to the oogonium like an accessory branch, with penetration tube. 
1. Subfamily. Planoblastse (Cystopodese). 
Nonsexual reproduction by swarm spores. Sporangia, either persistent on myce¬ 
lium or mostly falling as conidia and producing zoospores in germination. 
2. Subfamily. Siplioblastse (Peronosporese). 
Nonsexual reproduction by conidia, which germinate by germ tubes and are homol¬ 
ogous to the falling zoosporangia of the Planoblastse. 
Under Archimycetes some general account is given of the group, in¬ 
cluding directions for collection and preparation of specimens. This is 
followed by a very convenient and useful key to the genera, 29 in all. 
The following genera and doubtful genera, including 144 good species 
and 39 doubtful ones, are described in these three numbers: Sphterita, 
Olpidium, Pseudolpidium (nov. gen. with figs.), Olpidiopsis, Pleotra- 
chelus, Ectrogella, Pleolpidium (nov. gen. with figs.), Synehitrium, 
Woronina,Rliizomyxa, Pozella, Micromyces, Myzocytium, Achlyogeton, 
Lagenidium, Ancylistes, Resticularia, Rliizopliidium, Rhyzidium, Rhizi- 
diomyces, Aehlyella, Septocarpus, Harpochytrium, Entophlyctis (nov. 
gen. with figs.), Rhizoplilyctis (nov. gen. with figs.), Obelidium 
Ohytridium, Polyphagus, Cladocliytriuin, Amoebochytrium, Oatena- 
ria, Hyphochytrium, Nephromyces, Aphanistis, Saecopodium, Zygochy- 
trium, and Tetracliytrium. Only one new species is recorded, Olpidi¬ 
opsis minor. The genera are illustrated by good figures and followed 
by a host index. 
