176 МВ. W. MITTEN ON THE SPECIES OF 
ISOPTERYGIUM, Mitt. in Journ. Linn. Soc., Bot. xii. (1869) 497. 
117. I. Техтовт, Mitt.—AAynchostegium Textori, Sande-Lacoste in Мід. Ann. Mus. Bot. 
Lugd. Bat. ii. 299. 
In close depressed tufts, with immature fruit, ‘Challenger’ Exp. 
118. I. ггасстоом, Mitt.—Hypnum flaccidum, Ва Шу. et Lesq. 
Simoda, Amer. Explor. Exp. On rotten wood, ‘ Challenger’ Exp. 
119. I. Smart, Mitt—Hypnum Smallii, Sulliv. et Lesq. 
Ousima and Bonin Is., Amer. Explor. Exp. 
The description of this nearly agrees with 7. Textori. 
120. I. POHLIÆCARPUM, Mitt.— Hypnum pohliecarpum, Sulliv. et Lesq., also 
121. I. suBArBIDUM, Mitt.— Hypnum subalbidum, Sulliv. et Lesq. 
Both from Simoda ; appear to belong here or to Plagiothecium. 
HETEROCLADIUM, Bruch et Schimp. 
122. Н. TENUE, sp. n. Dioicum. Гахе cespitosum. Caulis procumbens subrepens 
ramosus. Folia laxe inserta divaricata ovata cochleariformi-concava, in acumen 
subulatum producta, enervia, integerrima, dorso papillis grossis inspersa ; perichze- 
баһа parva argute serrulata. Тһеса in pedunculo pregracili elongato oblonga 
horizontalis, peristomio Hypni. 
Barren plants creeping on bark, ‘ Challenger’ Exp.; amongst Hntodon Sullivantii, 
Nikko, male plants only, Bisset. Intermixed with other Mosses, with old fruit, Maries. 
Caulis 1-2 em., ramis 3 mm. longis inordinatis, cum foliis mm. dimidium latitudine 
vix attingens. Folia minuta obscuriuscula, cellulis ovalibus, papilla magna medio 
imposita obscuratis, areolata. Pedunculus 1 cm. altus, ruber. Theca minuta, peristomio 
valido. Flos masculus satis magnus, gemmiformis. 
One of the most minute of completely peristomate Hypnoid Mosses; it is allied to the 
Indian Hypnum inflecwm, Harv., in its foliage, and its horizontal capsule is of the same 
form; it is also allied to those Mosses which are placed in the genus МуигеЙа, and 
which differ from Heterocladium in aspect rather than in any essential character. 
123. H. LEUCOTRICHUM, 8р. п. Caulis procumbens, ramis simplicibus assurgentibus 
erectisve pinnatim ramosus. Folia appresse imbricata, a basi late ovata cochleari- 
formi-concava, margine ubique recurva integerrima, subito in apiculum angustum 
longitudine folium superantem, a medio e cellulis elongatis uniseriatis hyalinis 
angustissimis conditum, producta, nervis fere obsoletis, cellulis minutis ovalibus, 
parietibus eequilatis limpidis leevibus areolata. 
Pie amongst the stems of Tetraplodon mnioides and Т. angustatus, Nantaizan, 
Coulis 3 em. longus, ramis ut plurimis 1 cm. brevioribus. Folia cum pilo 1 mm. 
parum excedentia. 
