286 PROCEEDINGS OF THE AMERICAN ACADEMY 



flaccidis hyalinis amplissime rotundato-oblongoque-areolatis vix serru- 

 latis limbo angusto e cellularura serie unica circumductis, ad medium 

 tenuiter bicostatis ; capsula elongato-oblonga horizontali ; operculo 

 conico subulate ; calyptra mitriformi glabra, basi multifida ; perist. 

 H. Icete-virentis. — Logs in dense woods. — Near H. Olfersiana and 

 H. albicans, but the first species has entire leaves, an obovate capsule, 

 and a calyptra scabrous at its apex ; in the second, the leaf is oblong, 

 shortly acuminate, and strongly dentate at apex. Specimens under 

 this number (88) have synoicous and monoicous inflorescence. 



89. H. VARiANS, var. infloresc. monoica colore glauco-viridi. — On 

 decayed logs in forests. 



90. H. VARIANS, var. infloresc. monoica foliis oblongioribus altius 

 bicostatis. — Banks, mountain-sides. 



91. H. INCDRVA, Hooh. &)• Grev. ; Schwcegr. Suppl. t. 275. — Logs 

 in dense palm-woods. 



92. H. Merkelii, Ilomsch. Fl. Bras. 1, p. G2, t. 3. — Same local- 

 ity as the last. 



93. H. PAPiLLATA, Mont. Ann. d. Set. Nat. 1845, A, p. 93. — De- 

 cayed logs in woods. 



Gen. IIYPNUM, Lm7i. 



94. IL EXiLissiMUM {sp. 710V.) : monoicum minutissiraum viride ni- 

 tidum cajspitulosum ; caule arete repente ; ramis capillaribus erectis 

 simplicibus ramulosisque ; foliis erecto-patentibus anguste oblongo- 

 lanceolatis sensim acuminatis serrulatis mediotinus costatis, laxe areo- 

 latis, cellulis lineari-oblongis pellucidis alaribus numerosis quadratis 

 concoloribus ; capsula oblonga subfpquali parum inclinata macrostoma ; 

 peristomio eciliolato ; sporis majusculis ; operculo oblique aciculari- 

 rostrato. — On the bark of trees. — If. acanthophyllum, Mont., from the 

 description {Mull. 2, p. 398) appears to be very near this moss, but 

 differs in its horizontal capsule and carinate leaves destitute of special 

 alar cells. 



95. H. MiNUTULUM, Hedw.; Bryol. Europ. t. 481. — Decayed logs 

 and stumps in woods. 



96. H. scnisTOCALYX, C. 3Iull. Synop. 2, p. 691? — Locality same 

 as the last. 



97. H. TAMARisciNDM, Dill. / Bri/ol. Europ. t. 482 and 483. — De- 

 cayed logs. 



98. H. iNVOLVENS, Hedw. Muse. Fro7id. i, t. 11. — Same as the 

 last. 



