Anictangium.] MUSCI-ACROCARPI-GYMNOSTOMI. 11 



capsule; and then the presence of a white horizontal membranous ring 1 

 at the contracted mouth of the capsule and the absence of the teeth, will 

 decide its character. Now, Mr. W. Wilson has made a most interesting 

 discovery, and which perhaps will tend to clear up existing doubts, 

 respecting other genera of Mosses. After various observations made in 

 three different years, which tended to the same result, Mr. Wilson 

 writes from Camyneunt, near Aber, N. Wales, 26th March, 1830: — 

 " I find here constant traces of a peristome, requiring a high magnifier 

 to distinguish from the membranous border of the Gymnostoma, but 

 assuming sometimes the usual appearance of the small state of 

 Weissia controversy of which I am inclined to think it is a mere variety. 

 Specimens from Nant Frangon, gathered March 4th, 1830, have a defi- 

 cient peristome in the smaller capsules and most evident red teeth in 

 other cases." This goes far towards confirming an opinion I formerly 

 expressed, that the Ptychostomum of authors was a Br yum, with a defi- 

 cient inner peristome. 2 Leptostomuw, I have shown to have sometimes 

 a very near approach to teeth in the membrane at the mouth of the 

 capsule. 3 Hedwig's Bryum macrocarpum has a peristome of the same 

 kind. The Splachnum paradoxum of Br. (S. Adamsiannm ? Hornsch.) is 

 destitute of peristome. Mr. Wilson has proved that there is an imper- 

 fect inner peristome to Weissia (Entosthodon) Templetoni, so that it can 

 hardly be distinguished from Funaria. Other mosses will probably be 

 found to be subject to similar variations : and thus a new light will be 

 thrown upon the real nature of established species and genera. 



6. Anictangium. Hedw. Branched-Beardless-Moss. 



Seta terminal. Mouth of the capsule naked. Calyptra mitri- 

 form. (Muse. Brit. t. 1.) — Name, — «vo/xrog, open, and uyyuov, a 

 vessel or capsule, from the expanded mouth of the latter. — This 

 genus is distinguished from Gymnostomum by its mitriform ca- 

 lyptra, as Hedwioia is by its lateral fruitstalks. Henee, the 

 latter will be found among the Pleurocarpi. 



1. A. eiliatum, Hedw, (hoary Branched-Beardless-Moss)} 

 Leaves subseennd ovate concave distinctly dotted not striated, 

 the margins below recurved above plane acuminated ami more 

 or less diaphanous at the point, those of the perichsetium toothed 

 or serrated at the extremity, capsule sessile turbinate, lid plane 

 subumbonate. — *. vulgar e t all the leaves diaphanous at the 

 point, those of the perichsetium laciniated. A, ciliatum, Hedw* 



Sp. MuSC. p. K>. Turn, MUSC. Hil>. />. 11. Drum. Muse. Scot. 



v. i. //. 13. Muse. Brit <<l. 2. />. 27 . /. <>.— Hedwioia e/liata, 

 Hedw. St. Cr. r. I. /.-H».- — ScMsHdium ciliatum, Ihul.— Hruol. 

 Germ, r. I. p. 101. £.8. f. 5« — Gymnostomum ciliatum, Swartz, 



/■•/. r tll t. p. 1 168. E. BoL t. I 179. — Bryum ciliatum, Dicks, 



— Bryum apocarpum, 3, Linn, Sp. PL />. 1579. Dill, Muse. 



t. :)■_'./: .'). l.imberbe; stem-leaves coloured at the points, those 



of the perichsetium diaphanous ami serrated A. ciliatum, y. 

 ntfescens, Arn, Disp, Muse p. 1 1. — -1. imberbe, Muse lint. at. 2. 



1 Common Indeed t.i many Qwmmosioma, 



' Appendix «<> Captain Parryi Attempt to r ea ch the North Pole, p. I 



' Bee QwwmQStotiuun Leptottomum, Biusct BxcL t. 16ft 



