FKESI1 \VATKK A L O M OF T II K LMTi:i> .- T A IKS. gl 



Remark*. I found this plant growing in the large spring at Spring Mills in 

 Man-h or April. Tin- fromN \\. -re in tin- form of little bluckish balls attached to 

 the stems of mosses in the water. They varied in size from the minutest speck, 

 scarceK visible to the naked eye, up to ten lines in diameter; they are globose, 

 firm and hard, and the larger look almost as if they were aggregations of 

 smaller ones. They are gregarious. The spores are mostly borne on the edges 

 of the frond, sometimes they appear to be imbedded in its substance. At first 

 they are of an inten>e bluish-green, but afterwards they appear to be yellowish- 

 browii. None of the cells, as I have seen them, have their contents granulate. 



Fig. o n, pi. 10, represents a section of a frond magnified 460 diameters; fig. 

 ;"> /'. a section of the edge of an old frond, developing spores. 



P. hyaliiin, I.YNOB. 



" Fronds from a quarter of an inch to an inch in diameter, somewhat globose, bat at length fre- 

 <jii> nth- more or less elongated into an orate or even cylindrical form. Substance gelatinous 

 and very tender, of a pellucid, watery appearance. Grannies numerous, globose, green. 

 The fronds are produced at first on rocks and stones at the bottom of streams, and afterward! 

 become disengaged aud float on the surface." 



It-murk*. Professor Bailey states that he has found this species from Rhode 

 Island to Wisconsin. Whether it is identical with the P.hyalitia of Brebisson, or 



not, 1 cannot say. 



/ 

 Genus PAGEROGALA, 1 WOOD. 



Tliallus solidus, gclatinosns, indefinitus, exalbidus, nonnihil pcllucidulns, nodulis dense aggregatis 

 nlliii ntibus formatus. Cellulte globoste, conferte, in familias consociaUe. Familie tegu- 

 ment is tenuilms et membranaceis inroluUe, in nodulorum centro posiUe. 



Tliallus solid, indefinite, gelatinoas, whitish, somewhat pellucid, composed of closely aggregated 

 iKMluU-s whirli arc often indistinct. Cells globose, crowded in families. Families surrounded by a 

 thin mcmbranaceous coat and placed in the centre* of the gelatinoas nodale. 



/,' murk*. This curious plant was found by myself floating as indefinite masses 

 of milk-white jelly on a mountain spring near Bear Meadow, Centre County, Penn- 

 s)l\ania. Thelargestof these gelatinous masses was six inches long. On taking 

 them out of the water they were seen to be composed of somewhat irregular 

 nodules, which in some portions of the mass were very distinct one from the other, 

 but in other parts were confluent into an almost uniform jelly. When the nodules 

 were separated it was discovered that each contained a membranous very delicate 

 sack of a pale green color, which the- microscope showed to be really a cell family. 

 Their interior was hollow, or at least only partially filled with a transparent fluid, 

 and they contained all round their exterior portion a layer of round, closely placed 

 cells. In some instances the outer membrane was ruptured, and the sac only con- 

 tained a few cells, which could often be seen to be moving freely in the inner 

 liquid. The sac membrane, is thin and delicate, colorless, and marked with curious, 

 regular wrinkles or folds. In those portions of the common gelatinous mass, where 

 the nodules were lost, I could not find any of these sacs. 



, frozen ; yoa, milk. 



