1894. ] The Genus Naegelia of Reinsch. 55 
Hyphe composed of numerous successive nearly cylindrical 
segments, arising one to several from undifferentiated basal 
segments attached to the substratum, each segment produc- 
ing distally one to several similar segments, as a rule, bear- 
ing distally whorls of zoosporangia, oogonia and antheridial 
branches, the sexual organs on separate plants, but often as- 
sociated with zoosporangia in the same whorl. Sporangia one 
to sixin a whorl, slender sub-cylindrical to sub-clavate or stout 
and oval to elliptical or oblong. Oogonia sub-spherical to 
piriform becoming covered at maturity by a brown flaky in- 
_¢rustation disposed transversely, and containing a single 
spherical nearly smooth thick-walled oospore. Antheridia 
irregularly cylindrical, abruptly distinguished from the antheri- 
dial branch, sometimes divided by a septum, penetrating 
the oogonium always at its apex by a beak-like pollinodium. 
Hyphe 7~30u in diameter, the segments (larger) 450 x 10- 
154. Zoosporangia 22—25 x 35-200. Oogonia 26-40 X 32-55. 
Oospores 20-301. 
On Viscum stems and alge, Germany (Reinsch). On cones 
and twigs of Pinus in a spring, York, Maine, ; 
Cambridge, Mass. 
EXPLANATION OF PLATE V. 
Sapromyces Reinschii (Schrot.) Fritsch. 
one 1. General habit of sporangiferous hyphe.—Fig. 2. Whorl of three 
gia, one empty, the next before and the third during the discharge of zoo- 
Se the axis segment turned to the right. —Fig. 3. Portionof hypha bearing 
€r sporangia (Naegelia species 11) before the discharge of Pp .—Fig. 4. 
Hyp a bearing oogonia, one of which is terminal. Also portions of two hyphe 
Boeecins antheridial branches, one of them also a zoosporangium, x.—Fig. 5. 
on apex of the oosphere.—Fig. 6 
icium showing flaky incrustation of oogonium wall, acellulin plug filling its 
Spesirioved base.—Fig, 7. ig. 8. Oogonium 
racniolsy oosphere with two antheridia attached.—Fig. 9. Th basal cells 
a tes rom substratum, their cavities partly obliterated, that on the left giving 
*o a sporangium and segments bearing oogonia and sporangia. 
igs. 2-4, 9. D, oc. 2. Figs. 5-8. D, oc. 4. Photo- 
