. Mr, Hooxen’s Observations on Andrea. 383. 
“ Suture laterales, ex medio sursum deorsumque versus dehis- 
centes. . 
* Conjunctorium obtusiusculum. | 
* Dissepimentum nullum. 
** Styliscus cylindricus. 
* Spora subtilissima." 
With the above definitión of Andrea before him, it is a matter 
ofsurprise that Hedwig, in the Species Muscorum, should have 
altered the characters to 
* Capsula exigua, minuta. Perist. dentibus quatuor concavis, 
apice connexis, operculigeris :” 
thus mistaking the apophysis for a capsule, and the four 
valves of the capsule for the teeth of a peristomium. He has, 
however, rightly arranged it among the Musci. 
Bridel must have been entirely unacquainted with Andrea; 
or, surely, after having entered so deeply into the physiology of 
Mosses as he has done in the first volume of his Muscologia, he 
would have admitted the genus into that work. Had he once 
examined the fructification of Andrea, he would immediately 
have discovered that the characters of the order, to which it pro- 
perly belongs, are accurately described in the chapter of his work 
entitled * Quid sit Muscus." 
Dr. Roth comes next to be noticed, who, i in the third Sole 
of his Flora Germanica, has given a very full account of the 
genus, but has placed it among the Hepatice, on account of the 
capsule's opening into four valves. In order to do this, however, 
he supports an opinion that the conjunctorium of Ehrhart is not 
an operculum, and that it does not perform the office of that part 
ofa moss. But, till we are more fully acquainted with the use 
of the operculum, and till we are certain that the conjunctorium of 
3p 2 Ehrhart 
