OF ARTS AND SCIENCES. 289 



121. H. ADMiSTUM (sp. nov.) : JI. microcarpo (Mull.) simillimum 

 sed differt capsula inaequali obovata leniter incurva cernua, etc. — On 

 the bark of trees. — Scarcely distinguishable from Leskea adnata, 

 Michx. {=. H. microcarpum, Mull.), founded on Southern United 

 States specimens, except by the capsule, which in that species is 

 always oblong, erect, and equal-sided. It is probable the moss under 

 notice is the same as the St. Croix specimens, referred to Michaux's 

 species by Schwfegrichen (Suppl. t. 84), and from which Figs. 1 and 2 

 of that plate were taken. 



122. H. DissOLUTUM {sp. nov.) : monoicum H. admisto simile, diver- 

 sum tamen statura majore, csespite laxe coluerente, ramis eradiculosis 

 longioribus robustis rectis obtusis, foliis latioribus vix secundis, capsula 

 majore oblongo-incurva cernua, etc. — On dead wood. 



123. H. DISSOLUTUM, var. statura robustiore. — Same locality. 



124. H. THELiSTEGUM, C. Mull. Synop. 2, p. 269. — Rocks in shaded 

 ravines. 



125. H. THELISTEGUM, var. major. — Similar localities. 



126. H. CULTELLIFORME {sp. nov.) '. mouolcum prostratum com- 

 planatum parce ramosum sericeo-viride ; foliis laxe bifariis asymetrice 

 ovato-oblongis obtuse acuminatis lateralibus sjepe subaciniformibus ad 

 medium costatis serrulatis, cellulis exilissimis lineari-flexuosis alaribus 

 quadratis ; capsula oblongo-ovali horizontali ; operculo conico longius 

 rostrato. — Flat rocks in shaded ravines. — Resembles in general as- 

 pect and manner of growth H. deplanatum, Schimp., but that species is 

 somewhat larger, with a dioicous inflorescence. 



127. H. c^SPiTOSUM, Swartz'? — On decayed wood, very com- 

 mon. — This species agrees well with the description by Miiller {Synop. 

 2, p. 330) of the moss above named, but can hardly be the one figured 

 by Hedwig (aS^. Muse. t. 49) as Swartz's species. Hedwig's figure, 

 according to Wilson {Fl. N. Zeal. p. 113), does not agree with speci- 

 mens in Herb. Hook, named H. ccespitosum by Swartz himself. The 

 specimens here under notice accord exactly with South American ones 

 from Hampe marked H. Gallipense, C. Mull., which in the synopsis 

 1. c. is reduced to H. ccespitosum, Swartz. 



128. H. L^TUM, Brid. ; Sidliv. Icon. Muse. t. 115, ined. ; non 

 Bryol. Europ. — Rocks, mountain rivulets. 



129. H. RIPARIUM, Lin7i. ; Bryol. Europ. t. 570. — Wet places. 



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