160 DIPLOPERISTOMI. [Hypnum. 



erect, lid conical. With us, tliis moss has not been found in 

 fructification; but we have fine specimens in that state from 

 Switzerland ; from which our figure and description were made. 

 Sir James E. Smith, who had never seen the capsules, was per- 

 fectly correct in stating his doubts as to whether this moss 

 belonged to the genus Pterogonium. Wahlenberg, who first 

 described and figured this species, originally called it Leskea 

 julacea; but afterwards changed the specific name to the 

 scarcely less applicable one here adopted. 



14. H. catenulatum ; leaves subpatent ovate subacuminated papil- 

 lose on. the back and margin with a very short nerve, capsule 

 ovate inclined, lid conical acuminated. (TAB. XXIV.) 



Hypnum catenulatum. Schwaegr. Suppl. p. 218. Brid. Meth. p. 

 167. Hobson, Muse. Brit. v. 2. n. 58. Funck, Deutschl Moose, t. 39. 

 / 16. Am. Disp. Muse. p. 63. 



Hypnum Conferva. Schwaegr. Suppl v. 2. P. IL p. 158. t. 142. 

 Pterigynandrum catenulatum. Brid. Muse. p. 64. t. 5. f. 4. 

 Grimmia catenulata. Mohr. 



HAB. Wet rocks at the Dargle, and at Powerscourt near 

 Dublin, abundant. Ben Lawers. Dr. Greville. Campsie 

 Hills near Glasgow. Mr. Arnott. 



We believe we are correct in considering this moss, (which 

 we have seen in various collections, and which we suspect to 

 be figured in Engl. Bot. % as Pterogonium filiforme^) to be the 

 true H. catenulatum of Schwaegrichen. This is a genuine 

 Hypnum, having a single filiform process between the segments 

 of the inner peristome, as Wahlenberg has represented in his 

 H. moniliforme. The stems tore closely tufted, from one to two 

 inches in length, rigid ; leaves rather distant, of a dark green 

 colour, their margins appearing as it were serrated from the 

 papillose surface. In our specimens the nerve is short, not 

 more than one fourth of the length of the leaf, whilst in the 

 H. catenulatum of Schwaegrichen it is said to disappear beyond 

 the middle, the only difference we can discover. 



15. H. stramineum ; leaves loosely imbricated erecto-patent ob- 



longo-ovate obtuse entire shining their nerve reaching half 



* We mean the specimens received from Mr. Mackay. 



