32 T O R R E Y A 



and emerging singly. Rhizoids fairly rigid, with 1.5-4.5 p, thick walls, straight, 

 coiled, sparingly or richly branched, one rhizoid often predominant and very 

 prolonged, up to 500 /x in length. Resting spore spherical or sub-spherical, 

 22-35 fx in diameter, with a lamellated wall like that of the sporangium, 0.7- 

 1.3 [x, thick, with a faint golden tint; contents of resting spore consisting of 

 one or more large central globules surrounded by a peripheral layer of smaller 

 globules ; enveloped like the zoosporangium by one or several halos, acting like 

 a prosporangium upon germination, giving rise to a hyaline zoosporangium 

 29-37 n in diameter, which in turn is enveloped by a halo. 



Saprophytic on grasses, bleached corn leaves, and cellophane, Sharon, Con- 

 necticut. 



The third species belongs in the monotypic genus Catenochytridium and 

 differs from the type species, C. carolinianum, by its smaller multiguttulate 

 zoospores, by the asymetrical position of the sporangium and the presence of 

 a predominant primary apophysis. Because of these differences it is regarded 

 as a new species and given the name C. later ale nov. sp. 



Catenochytrium laterale sp. nov. — Zoosporangiis hyalinis, levibus, 

 ovatis, 16-46 x 21-62 p, sphaericis, 12-44 p, pyriformibus, 12-48 x 18-71 p, 

 cylindricis, 15-25 x 61-93 \x, atque intramatricalibus solis cum lobis, 28-63 x 88- 

 160/*; operculo apicali, sub-apicali, laterali, 7.5-15 /x diametro, plerumque in 

 sporangio vacuo persistente. Primaria cellula apophysidis semper dominante, 

 sphaerica, ovata vel cum lobis, usque ad 27-30 [x diametro. Segmentis catenulatis 

 apophysidis 1-7 numero, seriebus linearibus 1-4, primariae apophysidis cellulae 

 a latere vel ab apice affixis ut inter primariam apophysidis cellulam atque spo- 

 rangium emergant, raro ex radice primariae apophysidis cellulae emergentibus, 

 saepe omnino deficientibus. Rhizoideo systemate (apophyside primaria addita) 

 usque ad 224 jx magnitudine, minutissime ramificato, dichotomo. Zoosporis 

 hyalinis, sphaericis, 2.9-4.5 \x, cum duobus, tribus, quattuor (raro uno) , globulis 

 refractivis ; flagello 26-30 /x longitudine. Capsa zoosporae semper in zoospo- 

 rangio persistente, crassa, bulbosa, numquam depressa, sucino vel atro-fusco 

 colorata, raro apicali vel laterali, tuberculo simili in radice sporangi manerite. 

 Sporis perdurantibus non observatis. 



Catenochytridium laterale nov. sp. — Zoosporangia hyaline, smooth. 

 oval. 16-46 x 21-62 p, spherical. 12-44 /x. pyriform, 12-48 x 18-71 /x, cylindrical, 

 15-25 x 61-93 ix. and lobed, 28-63 x 88-160 fi, when developed intramatrically ; 

 operculum apical, sub-apical, or lateral, 7.5-15 jx in diameter, generally per- 

 sistent on the empty sporangium. Primary apophysate cell always predominant, 

 spherical, ovoid, or lobed, up to 27-30 fi in diameter. Catenulate segments of 

 the apophysis 1-7 in number, arranged in 1-4 linear series attached to the pri- 

 mary apophysate cell laterally or apically, so that they emerge between the 

 primary apophysate cell and the sporangium, rarely emerging from the base of 

 the primary apophysate cell, often completely lacking. Rhizoidal system (includ- 

 ing primary apophysis) up to 224 fx in extent, becoming finely branched; 



