MOSSES WITH A HAND-LENS 201 



PAGE. 



51 Trematodon ambiguus (Hedw.) Hornsch 40 



*52 T. longicollis MX 40 



GRIMMIACEAE 51 



53 Grimmia apocarpa (L.) Hedw 55 



54 G. Olneyi Sulliv 57 



55 G. Pennsylvania Schwaegr 57 



56 Hedwigia albicans (Web.) Lindb 52 



(PI. ciliata). 



57 Ptychomitrium incurvtim (Schwaegr.) Sulliv 53 



58 Rhacomitritim aciculare (L.) Brid 59 



59 R. fasciculare (Schrad.) Brid 59 



. 60 R. microcarpum (Schrad.) Brid 59 



TORTULACEAE 63 



6,1 Astomum Sullivantii Schimp 37 



62 Barbula convoluta Hedw 70 



63 B. unguiculata (Huds.) Hedw 67 



*64 Desmatodon plinthobius Sulliv. & Lesq 74 



*65 Didymodon rubellus (Hoffm.) B. & S 38 



66 Gymnostomum curvirostre (Ehrh.) Hedw 64 



*67 G. rupestre Schleich 64 



68 Portia truncatula (L.) Lindb 91 



(P. truncata). 



*69 Tortella caespitosa (Schwaegr.) Limpr 70 



(Barbula caespitosa). 



70 T. tortuosa (L.) Limpr 70 



(B. tortuosa). 



71 Tortula muralis (L.) Hedw 72 



(Barbula muralis). 



72 T. ruralis (L.) Ehrh 74 



(B. ruralis). 



*73 T. ruraliformis (Besch.) Dixon 74 



74 Weisia viridula (L.) Hedw 64 



ENCALYPTACEAE 76 



75 Encalypta ciliata (Hedw.) Hoffm 78 



76 E. streptocarpa Hedw 76 



ORTHOTRICHACEAE 78 



77 Drummondia clavellata Hook 79 



78 Orthotrichum anomalum Hedw 82 



*79 O. obtusifolium Schrad 86 



'Species marked * ate not illustrated. 



