Hew Plants of the Orders Musci and Hepattcce. 273 



than six species. His character rests mainly upon a short 

 simple peristome of 16 nearly horizontal connivent teeth, 

 " intus adnatis," and a smooth calyptra. The true Calym- 

 peres has, according to him, a furrowed calyptra. It is very 

 doubtful in my opinion, whether Calymperes and Syrrhopodon 

 will not be found to pass so much into each other, as to render 

 it impossible to keep them distinct. The peristome of Ca- 

 lymperes Gardneri (Hook.) is exactly intermediate, con- 

 sisting of a spongy membrane at the base, while the centre 

 only splits into short teeth. In Calymperes Hobsoni, of the 

 present paper, the calyptra is smooth, and consequently we 

 should expect from Schwaegrichen's observations, that the 

 capsule would be furnished with a peristome. There is, how- 

 ever, nothing to be seen but a very white spongy membrane, 

 with such a cavity in the centre, as we might suppose to be 

 produced by the destruction of such short teeth as C Gard- 

 neri possesses. In some species of Syrrhopodon, the teeth 

 are figured as distinct, to the base, while in others, (S. Taylori 

 and involutus,) they are united towards the base. 



Calymperes Hobsoni, bears a considerable resemblance to 

 Syrrhopodon albovaginatus, but the calyptra is much larger, 

 and the leaves more rigid, not so exactly linear, and differing 

 in the kind of margination. The spongy membrane shrinks 

 very much in drying, so that it resembles only a white ring 

 within the mouth of the capsule, but swells out instantaneously 

 on the application of moisture. 



TAB. XXIII. Fig. I. Plants nat. size. 2. A leaf magn, 

 3. A small portion of the margin of a leaf. 4. Calyptra. 5» 

 Capsule with the operculum. 6. Appearance of the peris- 

 tome in every specimen I examined. All except fig. 1* 

 more or less magnified. 



Bryum. 

 2. Bryum ciliare ; caule elongato, foliis oblongo-obovalis, 

 ncutiusculis, minute reticularis, marginatis, serrato-ciliatis, 



