^v 



WOLLASTON EXPEDITION TO DUTCH NEW GUINEA. 



483 



sate (wider than the cell hiinen) and strongly porosc, are very different from 



any o£ tlic allied species I know, 



C- Mueller has detoruimed a species oE Breutelia from K"ew Guinoa 

 (Morokaj Port Moresby District, leg. Loria, No. 1585, Bryotheca E, Levier) 

 as B . pungentella^ n. sp,, in lit., 1897. The specimen in the British Museum 

 collection, howoverj is a Dieranoloma^ with reflcxed leaves and somewhat a 

 Breubdioid liahit. Is it the correct thing? In any case it is an unpublished 

 species. 



POLYTRTCHACEiE. 



gracile ; caules V5-2 cm. 



PoGONATL'M Klossii^ Dixon, sp. nor. 



P. alho-marginato^ C. M., boniensi sat affinc ; 

 alti, stricti ; folia madida horride patentia, sicca leniter incur vo-cri spat a ^ 

 5-6 nun. longa, e basi elonyafa dimidiani partem folii sequantc breviter 

 lanceolataj subobtnsa, supra sat conferte breviter dentata. Lamellae circa 30, 

 (3-8 stratosse, cellula apicali sectionc transversa sitperne dilatata^ plana vel 

 mtnime eniar<jinata. Seta altitadine variabili, 2-4 cm. alta, tenuis ; theca 

 (immatura) curvataj horizontalis, pUcata, papillis dcnsis altis obtecta. 



Calyptra pallide fnsca. 



Camp Via, 3050 ft. 



A not very distinct species, though not very closely allied to any that I 

 know. The broadly flattened apical cell of the lamelhe and the very highly 

 papillose capsule will readily separate it from all allied species, including 

 P. alho-marginatinUy C* M,, to which it appears to have the nearest affinity. 



/ 



DAWSONIACE^. 



New Guinea and Australasia appear to share nearly equally the claim to 

 bo considered tlie natural lioine of this magnificent family. Including the 

 two now species described In this paper, 12 species altogether nre known, of 

 which G inhabit the Australasian group and G New Guinea, Ihcy do not 

 vary greatly in struclurCj at least as regards the group of larger species, 

 whicli for the niost part are separated principally by dimensional characters 

 (length of stem, leaves, and seta) and by rather minute differences in the 



characters of the foliar lamella). 



Five of the six Australasian species are comparatively small in size; the 

 remaining species, ]). superha^ li. Br., comes very near in habit to the larger 

 Neu- Guinea species, and has the widest distribution of all the species know^n 

 (Australia, Tasnia.nia, New Zealand, Borneo). It comes, indeed, very close 

 to J), gigantea^ C. Muell. It may assist in elucidating the ditferences and in 

 "ivino- a clearer idea of the newly described species if I give a Key, bnsed 





considerably on that given by Brotlicrus ('Musci/ p. 700) cf the New Guinea 



