48 Illinois State Laboratonj of Natural History. 



mouth somewhat truncate; capsule 0.6 — 2 cm. high, very thick, 

 provided with stomata, the pedicel very short; spores large, 

 plano-convex, distinctly papillose: elaters small, somewhat tri- 

 angular prismatic. (A. Lescurii ft A. Joorii Aust. are mature 

 forms of the plant as originally described. ) 



Hab. — On moist earth; S. 0. (Ravenel), Fla. (Austin), La. {Joor). 

 Bib— Torrey Bull. VI, 28, 29, 305. 



12. A. Olneyi Aust. Thallus subprostrate or erect, 

 somewhat oblong-flabelliform, variously lobed or crenate, sub- 

 striate-venose, with large, black, tuberculate granules beneath 

 its surface; involucre cylindric, about 2 mm. high, slightly stri- 

 ate, impunctate, the apex truncate, the mouth crenate, repand 

 or dentate; capsule 0.6 — 2 cm. high, erect; spores large, plano- 

 convex, opaque, minutely papillose-granular; elaters strongly 

 compressed, articulated. 



Hab. — Fla. [Chapman). 

 Bib.— Torrey Bull. VI, 'z9. 



II. NOTOTHYLAS Sulliv. 



Monoecious, the fructification dorsal, scattered. Involucre 

 sessile, continuous with the thallus, closed at first, at length 

 splitting by chinks above. Capsule very short, included in the 

 involucre, oblong-spheroidal, compressed or ovate-cylindric, 

 pedicelled, the pedicel arising from a thickened bulb, the suture 

 breaking in small pieces. Columella linear. Spores in fours, 

 subglobose, smoothish. Antheridia immersed in the thallus, 

 elliptic-globose. Thallus orbicular, laciniate, tender, papillose- 

 reticulate, the margin undulate, crisped, radiculose beneath. 

 Name from Gr. iiotos, the back, and thiilas, a bag, from thp 

 shape and position of the involucre. 



1. N. orbicularis Sulliv. Thallus 0.6—1.6 cm. wide: 

 capsules more or less curved, 2 — 4 mm. high, erect or decum- 

 bent, wholly included in the involucre or slightly exserted, 

 marked with a suture on each side, the texture thin and rather 

 loose; elaters minute, pale, nearly or quite as long as broad; 

 antheridia iinmersed in cavities which have their sides slightly 



