276 PROCEEDINGS OF THE AMERICAN ACADEMY 



of Captain John Rodgers. By William S. Sullivant and 

 Leo Lesquereux. August, 1859. 



1. FissiDENS LAXUS (sp. nov.) : dioicus, perpusillus, acfocarpus, 

 simplex ; foliis 5 - 6-jugis oblongis longius acuminatis costa excurrente 

 cuspidatis laxe areolatis, ai'eolis hexagono-rotundis permagnis ; capsula 

 ovali leptodermi. 



Hong Kong, China. 



2. FissiDEXS INCRASSATUS (sp. nov.) : dioicus, pusillus, acrocarpus, 

 ramosus ; foliis 8 - 10-jugis oblongis lineari-oblongisve subito acumi- 

 natis dense minute areolatis, costa vix excurrente ; capsula ovali-oblonga 

 pachydermi ; operculo longe rostrato ; calyptra dimidiata. 



On rocks at Camoens' Grotto, near Macao; also at Hong Kong, 

 China. 



3. FissiDENS PUKGENS (sp. nov.) : monoicus, acrocarpus, pusillus, 

 simplex; foliis 10-14-jugis anguste linearibus sensim acuminatis, 

 costa sub apice desinente ; capsula ovali rostrato-operculata ; calyptra 

 anguste conica ; flQfibus masculis axillarjjjus. 



On rocks in shaded ravines, Hong Kong, China. 



leum, H. salebrosum, H. velutinum, H. rutabulum, H. serpens var., H. adnatum, 

 H. denticulatum, H. serrulatum, H. microcarpum, H. brevii'ostre, H. triquetrum, 

 H. splendens, H. Oakesii, H. pratense, H. Haldanianum, H. cupressiforme van, H. 

 polymorphura, H. cuspidatum, Hookeria lucens var. ? Anomodon tristis, Pylaisasa 

 velutina. 



These species are distributed as follows : — eight occur only in Eastern North 

 America, and six in Europe ; two occur in Europe, and in Western North America ; 

 seven in Europe and in Eastern and Western North America; and thirty-one are 

 common to both Europe and Eastern North America. Or, in other words, forty 

 are found both in Europe and in North America ; of the remaining fourteen, six 

 are restricted to Europe, and eight to North America. 



Closely aUied to these fifty-four species are the twenty-four Japanese and 

 Chinese species here characterized as new. 



From these data it is apparent that the similarity of the bryology of Japan to 

 that of Europe and North America, particularly their Western and Eastern portions 

 respectively, is even greater than that which prevails (as recently shown by Pro- 

 fessor Gray's admirable papers on the subject) in the PIia;nogamous floras of those 

 countries; and indeed, excluding a Uypopteiijr/ium and a few Macromitria, — the 

 latter represented by one species on the Southern Alleghany Mountains, — if all 

 the species of the Japan collection should be found in New England, it would ex- 

 cite no other surprise than that they had so long escaped detection. 



