224 PROCEEDINGS OF THE ACADEMY OF 



basin cum cellulis maximis oblongis hyalinis marginato ; foliis imbricatis 

 late et suboblique ovatis margine inf'eriori abrupte decurrentibus supra valde 

 convexis siccate nou mutantibus apice pro genere lato subcontractis emargi- 

 nato-bideutatis, dentibus triangulari-subulatis rectis vel plerumque divaricatis, 

 sinu plerumque lunulato ; rete e cellulis hexagonis magnis hyalinis, versus 

 basin oblongis, versus apieem rotuudatis ac sensim minoribus, secus raarginem 

 angustioribus plus minus quadrangularibus transversimque elongatis in- 

 striicto ; amphigastriis valde dissitis minutis caule angustioribus vel cum vix 

 excedentibus ovatis vel reniformi-rotundis obtuse profundeque bifidis, laciniis 

 rectis subulatis integrisque vel subrotuudis divaricatis ac iterum bifidis. 

 Sandwich Islands. Communicated by Dr. H. N. Bolander, (1865.) 

 A neat and pretty little species. Possibly too near the Mexican C. laxat 

 L. ^' (/., Syn. Hep. 2). 713, but nothing is there said about the flagiliferous 

 ramification, a striking feature of our plant; and the leaves are said to be lax 

 and minutely bidentate, characters which do not agree with our plant, whose 

 Ittaves do not change their shape in drying, and, for the genus, are pretty 

 strongly toothed. The peculiar bifurcation of most of the amphigastria, and 

 the transverse elongation of the marginal cells of the leaf, appear to be generic 

 characters (specific only in degree), as they occur (in a less degree) in C. Tri- 

 chomanis, and at least in two other species. 



Physiotium subinflatdm, Aust. 



Ph. foliorum lobulis subinsequalibus lanceolatis acurainatis circa J — f li- 

 beris ; dorsali convexo, margine exteriori versus basin inflexo subbidenticulato- 

 que, apice subconvoluto dentibus parvis rectis acutis minute bifido ; ven- 

 trali parce minori convoluto-concavo, basi ob margines coalescentes breviter 

 mbuloso non appendiculato, margine interior! subalato, ad apieem angustem 

 sublingulato obtusiusculo integro et integerrimo vel eroso-denticulato. 

 Sandwich Islands. Communicated by Dr. H. N. Bolander, (1865.) 

 Remarkable for the subequal acuminate lobes of the leaf; the lower one not 

 appendiculate, and inflated only at the base, convolute-concave above. 



PoLYOTUs Peckianus, Aust. 



P. caule repente pinnatim vel bi — tripinnatim ramoso, ramulis dissitiusculis 

 patuli-recurvis J| — f-uncialibus subattenuatis ; foliis arctissime imbricatis »ub- 

 ovatis obliquis convoluto-decurvis inwqualiter bi — trilobis integerrimis basi 

 utrinque auriculatis, sinu angusto, lobis ovatis acutis vel subapiculatis aut 

 rare obtusis inferioribus incurvis ; auriculis subparvis oblongo-lanceolatis 

 canaliculato-concavis, ventralibus stricte patentibus caulem arete amplectenti- 

 bus, dorsalibus plus minus deflexis cauli arete appressis ; amphigastriis 

 maximis oblongis profundius et cequaliter bifidis, basi ut in foliis auriculatis, 

 auriculis caulem utro-bique arete amplectentibus ; fructu in ramulo brevi poly- 

 phyllo ; involucri foliis valde majoribus oblongis basi parce longissimeque 

 ciliato-lobulatis profunde bifidis, laciniis ligulatis undulatis subdentatis canaii- 

 culatis. 



Island of Mauritius. Communicated by Prof. C. H. Peck, (1868). 



Remarkable for the bi — triiobed leaves, and for the very large bifid amphi- 

 gastria, which are auricled at the base in much the same manner as are the 

 leaves. The stems are about 2i inches long and rather widely branched. The 

 leaves do not change their shape in drying. In size the plant rather exceeds 

 frullania Tamarisci. 



Sendtnera tristicha, Aust. 



S. parvula, rufo-brunnea vel subnigra ; caule rigido parce ramoso tenui 

 subunciali ; foliis amphigastriisque exacte tristichis ovatolanceolatis falcato- 

 subsecundis apertis vel siccatis appressis apice ad i partem fissis, lobis acutis- 

 simis inwqualibus recto-conuiventibus f fructu . 



[Dec. 



