:mr. TV. MiTTi!;>"'s list of samo.vn mosses. 195 



CE. INVOLUTACEUM, sp. n. Rami eloiigati, ramosi, CEcspitosi; folia pa- 

 tentia, laxe imbricata, in ramorum apicibus cuspidato-imbricata, ob- 

 loMgo-ovalia, marginibus superne involutis, apice subito in acumen 

 elongatum angustura curvatura serrulatum producta, cellulis elongatis 

 angustis (alaribus conspicuis suboblongis) fuscis ; perichEetialia erecta, 

 interna ovalia subulato-attenuata serrulata ; theca in pedunculo elon- 

 gate, ovalis, parva, horizontalis, basi rugulosa, operculo rostrato ; pe- 

 ristomium internum ciliis singulis? 



Hab. Tutuila. No. 140. 



Very nearly allied to 0. rufescens, Hornscb. {LeucodoTi)^ but 

 with the leaves not teretely imbricated, and their margins more 

 involute. 



The position of these species is not yet clearly ascertained ; but 

 they have no affinity to Leucodon as understood by the species 

 similar to L. securoides, Schw. In O. riffescens the peristome 

 appears to be simple, the teeth very thin, with slight trabecular 

 on the internal side. 



In both species the capsule is small, and the seta very slender 

 for the size of the moss. 



Only one old capsule remained on the Tutuilan specimens ; so 

 that the structure of the peristome must remain somewhat doubt- 

 ful. 



EXPLAJf ATION OF PLATES V. & VI. 



A. Meteorium intricahim, p. 171- 



1, Branch, of the natural size: 2, leaf of the same; 3, leaf from the rarauli; 

 4, perichaitium and capsule; 5, portion of the peristome: 2-5 magnified. 



B. MetcoTutnt ^ruginosum, p. 171. 



1, Branch, of the natural size : 2, portion of the same ; 3, leaf detached ; 4, pe- 

 richoitimn and capsule ; 5, portion of the peristome ; G, caljptra (young) : 

 2-6 magnified. 



C. Pelekium velatum, p. 176. 



1, Stem, of the natural size: 2, portion of a branch with loaves ; 3, portions of 

 wunulus ; 4, leaf from the stem ; 5, portion of st«m with fruit, calyptra, 

 and male flower ; 6, perichaitial leaf detached ; 7, capsule ; 8, portion of 

 peristome : 2-8 magnified. 



D. Powellia involutifolia, p. 187. 



1, Plant, of the natural isize: 2, portion of stem with leaves, as seen from the 

 upperside; 3, perichaitium and young seta with calyptra; 4, perichtetiftl 



agn 



Jyrepanophyll 



1, St^m, of the natural size; 2, portion of the same with leaves, magnified. 



o2 



