( 54 ) 



22. RADULA, Nees. 



complanata, Dumort. Base of trees. 



23. PTILIDIUM, Nees. 

 ciliare, Xees. Eotten logs in woods. 



24. TRICHOCOLEA, ¥ees. 

 tomentella, Nees. Moist places. 



25. MASTIGOBRYUM, flees. 

 trilobatum, ISTees. Damp earth. 



26. LEPIDOZIA, flees. 

 reptans, flees. Earth. 



27. CALYPOGEIA, Eadd. 

 Trichomanis, Cord. Springy places. 



Class V. THALLOPHYTES. 



I. CHARACE^. 



(By C. 0. Frost.) 



1. NITELLA, Ag. 



1. gracilis, Ag. 



2. syncarpa, Thuill. 



3. flexilis, Ag., & var. glomerulifera, Braun. 



4. mucronata, Brann. 



5. batrachosperma, Braun. 



2. CHAR A (L.), Ag. 



1. vulgaris, L. 



2. coronata, Ziz., var. Schweinitzii, Braun. 



II. ALGiE. 



(Not yet studied ; but Lemania fluviatilis, Ag., is noted as occur- 

 ring at Turner's Falls. Hitchcock.) 



III. LICHENES. 



(By Edw. Tuckerman.) 

 1. RAMALINA, Ach., Deflot. 



1. calicaris, Fr. 



2. pollinaria, Ach. 



2. CETRARIA, Ach, Fr. 



1. aleurites (Ach.) Th. Fr. 



2. Fahlunensis (L.) Scha}r. Brattleborough, Russell. 



3. ciliaris, Ach. 



