by k. a. bastow, f.l.s. 219 



35. Metzgeria. 



Calyptra on under side of continuous frond ; nerve 

 narrow. (PI, xxxii,) 



36. Sarcomitrium (aneura). 



Calyptra lateral ; frond composed almost entirely of 

 thickened nerve. (PI. xxxiii-iv.) 



C. — CARNOSiE. — Fronds fleshy, witn oblique scales on 

 under side. (PI. ii., f. 6, 8.) 



{a.) Fruit imbedded in substance of Frond. 



37. RicciA. (PI. i.) 



(6. Fruits terminal on the under side of Frond. 



38. Targionia. 



Involucre two-valved. (PL xxxiv.) 



(c.) Fruits, many on the under side of a stalked 

 peltate receptacle. 



39. Marchantia. 



Perianths opening downwards. (PI. xxxv.) 



40. Reboulia. 



Perianth none ; involucres opening by two valves. 

 (PI. xxxv.) 



41. Fimbriaria. 



Perianth split into bands, cohering at their apices, 

 (PI. xxxv.) 



D.—ANTHOCEROT-^.— Frond fleshy, without scales 

 beneath. (PI. ii., f. 7.) 



42. Anthoceros. (PI. xxxv.) 



