278 PROCEEDINGS OF THE AMERICAN ACADEMY 



lingulato-spathulatis inferne oblongo-, superne hexagono-, amplissirae 

 areolatis anguste marginatis, costa apicem vix attingente ; capsula 

 cylindracea erecta ; operculo conico-lineari obtuso. — Dry, shaded 

 banks. — Stems 3-4 lines, pedicels 7 — 8 lines high. The foliage 

 much resembles that of Mnium punctatiim. 



Gen. DICRANUM, Hedw. 



34. D. DEBiLE, Hook, et Wils. ; Sulliv. Icon. Muse. ined. t. 20. — 

 Ground, wet places. 



35. D. ALBULUM (sp. nov.) : dioicum albido-viride tenerum laxe 

 caespitans flexuoso-erectum ; ramis incurvis ; foliis pellucidis confertis 

 homoraallis subfalcatis anguste longe lanceolato-subulatis convolutis, 

 margine lineari-areolato ad basin late apicem versus angustiore vel 

 evanescente circumductis, cellulis superioribus quadratis, inferioribus 

 lineari-oblongis, alaribus ventricosis aureo-fuscis, costa debili percur- 

 rente apice dentata ; capsula elongato-cylindracea erecta ; operculo 

 conico-aciculari. — On decayed logs. — A pale-green species, resem- 

 bling small forms of D. congestwn. Teeth of peristome light brown at 

 base, yellow above ; spores large. Belongs to the section Leucoloma 

 of Dicranum (Midi. Synop. 3Iusc.). 



Gen. ANGSTRCEMIA, Br. et Sch. 



36. A. GuiLLEMiNiANA, Mout. Syll. Cryptog. p. 44. — Banks, 

 on mountain-sides. 



37. A. VAUiA, var. Hedw. ; Bryol. Europ. t. 57, 58. — Road-sides. 



Gen. CAMPYLOPUS, Brid. 



38. C. GiGANTEUS {sp. nov.) : procerus robustus luteo-viridis nitidus 

 fusco-tomentosus parce ramosus ; foliis in sicco vel humido reflexo- 

 patulis loiigissime lanceolato-subulatis supra medium argute seri-atis 

 minute quadrato-areolatis, cellulis alaribus permuitis amplis fuscis, 

 costa percurrente dorso maxime lamellosa ; capsula in pedicello brevi 

 cygneo-demissa ovato-gibbosa sulcata strumulosa ; calyptra dimidiata 

 basi albo-fimbriata ; operculo longe rostrato. — Grows in wide, dense 

 masses, on the summit of high mountains. A very large species, with 

 stems 3-5 inches high, and leaves three fourths of an inch long. 



39. C. CuBENSis (sp. nov.) : robustiusculus lutescenti-viridis nitidus 

 purpureo-tomentosus innovando-ramosus subinterrupte foliosus ; foliis 

 longissimis siccis vel humidis retlexo-patentibus angustissime lauceo- 



