72 MUSCI-PLEUROCAKPI-PERISTOMI. [Daltonia. 



Brit. t. 3.) — Named from *. not, vopog, a law, and ohav, a tooth; 

 from the anomalous nature of the peristome. The same pecu- 

 liarity is found in some Orthotricha and in Daltonia. Such 

 mosses cannot be said to have a double peristome in the usual 

 acceptation of the words, i. e. one within the other. When 

 similar characters are accompanied by a peculiar habit they may 

 be deemed of sufficient importance to constitute generic dis- 

 tinctions. 



1. A. curtipendulum, Hook, and Taylor, (pendulous Anomo- 

 don); leaves ovate acuminate toothed, the nerve disappearing 

 below the point, seta twice as long as the perichsetium, capsule 

 ovate. Muse. Brit. ed. \.p.l^.ed.2.p. 137.^.22. Hobs. Br. Mosses, 

 v. 2. n. 49. Drum. Muse. Scot. v. 1. n. 62. — Neckera curtipe?i- 

 dula, Hedw. Sp. Muse. p. 209. Turn. Muse. Hib. p. 102. Fl.Brit. 

 p. 1275. E.Bot. t. 1444. Schwaegr. Suppl. v. 1. P. II. p. 151. 

 — Antitrichia curtipendula, Brid. — Hypnum curti pendulum, Linn, 

 —DHL Muse. t. 43./. 69. 



Upon rocks and trees, principally in mountainous countries. On 

 sandy plains, near Yarmouth, but always barren. Fr. Spring. — This 

 moss is of a peculiarly dark, almost blackish, green, 3, to 8— 10 inches 

 long, pinnated with cylindrical branches ; the extremities slightly incras- 

 sated. Leaves imbricated on all sides, concave with a reflexed margin. 



2. A. viticulosum, Hook, and Taylor, (cylindrical Anomodon); 

 leaves ovato-lanceolate obtuse entire the nerve reaching to the 

 point, seta very long, capsule cylindrical. Muse. Brit ed. 1. 

 p. 80. ed. 2. p. 138. t. '22. Hobs. Br. Mosses, v. 2. n. 50. Drum. 

 Muse. Scot. v. 1. n. 63. Schwaegr. Suppl. v. 1. P. II. p. 149. 

 —Neckera vitic. Hedw. Sp. Muse. t. 48. /. 4—8. Turn. Muse. 

 Hib. p. 103. — Hypnum viticulosum, Linn. Sp. PI. p. 1592. Fl. 

 Brit. p. 1275. E. Bot. t. 263.— Dill. Muse. p. 39. /. 43. 



Upon trees and rocks ; less frequently on the ground. Fr. Feb.— 

 Leaves imbricated on all sides of the stem, erect, patent, somewhat 

 waved, of a thick and soft texture and pale green colour, very yellow 

 when old. Perichcetium small ; nerve strong. Seta an inch or more long. 

 Lid rostrate. 



36. Daltonia. Hook, and Taylor. Daltonia. 

 '■ Seta lateral. Peristome double ; consisting of 16 teeth, with a 

 ciliary process arising from the side of each. Calyptra mitri- 

 form. (Muse. Brit. t. 3. f. 1—4.)— Named in compliment to 

 the Rev. James Dalton, F. L. S. Rector of Croft : a gentleman 

 as much distinguished by his botanical as by his classical ac- 

 quirements, a lover no less of science than of the fine arts, and 

 one whom the author has been long proud to number among 

 his most valued friends.— This Genus is the same with Cryphcea 

 of Web. et Mohr, and Bridel : but there was already a Cryphia 

 of Mr. Brown. 



1. D. heteromdlla, Hook, and Taylor, (lateral Daltonia). 

 Misc. Brit. ed. 1. p. 81. ed. 2. p. 139. t. 22. Hobs. Br. Mosses, 



