310 Mr* Hooker's Descriptions of new Mosses from Nepal 



instar punciatum, conicum, c urvulum. Calyptra tenuis, di- 

 lute fusca, subulata, curvata, dimidiata, laevis. Peristomi- 

 um dentibus sedecim, suberectis, e capsular membrand in- 

 teriore reticulata ortis, lineari-subulatis, luteis, transverse 

 striatis, a basi ad medium longitudinaliter fissis. 



I have named this plant from its most obvious character, the 

 drooping capsule, in which it differs from all the other species 

 of this genus described by Hedwig or Bridel, and has, in conse- 

 quence of it, so completely the appearance of a Hyp?ium> that no 

 one would suspect its real family, without first examining it. 

 There will also be found under the microscope a strong pecu- 

 liarity in the circumstance of the teeth of the peristomium being 

 cleft in a very curious manner. 



Tab. XXVI. Fig. 3, 



a. Pterogonium decli?iatum, natural size. 



b. part of a branch, magnified. 



c. leaf. 



d. perichatial leaf. 



e. capsule. 



f. operculum. 



g. calyptra, with the operculum. 

 h. teeth of the peristomium. 



5. Pterogonium ambiguum. 



Tterogonium caule pendulo pinnato, foliis obovatis concavis uni- 

 nervibus, capsuU terminali globosS, sessili, operculo pla- 

 niusculo. 



Caules semipedales et ultr&, denudati, tenues, subflexuosi, de- 

 biles, 



