1889.] BOTANICAL GAZETTE. IQ.} 



type species Jungermania Hutcliinsuc Hooker, and as this i 

 the type of a very distinct genus, properly retains this name. 

 Phragmicoma, although preceded by Gray's Marchesinu 

 has stood as a genus until recently, when it has been united 

 with Lejeunea by one of the masters in hepaticology in his 

 recent revision 11 . The distinctive characters of Marsupella 

 have been pointed out, and it has been re-established by the 

 same masterly hand 12 . Thricholea (afterwards changed by 

 Dumortier himself to Tricholea, and by Nees corrected to 

 Trichocolea) and Saccogyna still stand as good genera. 

 This leaves the two genera, which have been referred to 

 already, Aneura and Radula. The case of the first is rather 

 simple : Riccardius, established by Gray, contained three 

 Linnaean species, viz : Jungermania multifida, J. pinguis and 

 Riccia fluitans. Aneura, established a year later by Dumor- 

 tier, contained four, viz: Jj. multifida, sinuata, pinguis and 

 palmata. The name Riccardia, being preoccupied elsewhere, 

 as is the earlier Candollea of Raddi, there seems little reason 

 why Aneura should not be maintained, excluding, of course, 

 the third species of Riccardius, which Gray, attracted by 

 superficial resemblance, had erroneously placed here. 



The other case is more complicated. Gray established 

 the genus Martinellius, of which the first-named species was 

 Jungermania complanata L., followed by eight others, in- 

 cluding J. nemorosa and J. spinulosa. A year later Dumor- 

 tier established the genus Radula, of which the first species 

 was the same J. complanata L., followed by, essentially, the 

 same species. In a later work Dumortier 13 divided this ge- 

 nus into three sections : 1. Radulotypus, of which compla- 

 nata is the type ; 2. Scapania, of which nemorosa is a type 

 and 3. Plagiochila, of which spinulosa is a type. Still later 

 he established the two latter sections as genera which have 

 since been properly recognized as such, and with the advance 

 of the study in other regions have so grown as to contain a 

 very extensive array of species. If we are to adopt Gray 

 nomenclature in this case, the name Radula must certainly 

 be displaced by Martinellia, as Dr. Carrington has well ob- 



served 15 . What 



next oldest 



"Richard Spruce. Hepatic© of the Amazon and of the Ai 

 ns. and Proe. of the Bot. Society (Edinburgh) X\ . (18S&). 



12 Revue Bryologique, VIII, 89-104 (1881). 



lloge Jungermannidearuin Buropa indigenaruni, 1831. 



14 Recuiel d'Observations sur les JungermanniaoVs, 18S5. 



1 5 British Hrpaticfe, p. 52. 



