of Smith, of the Order Musci. 235 



The nearest affinity of this species is with H . rotulata, but it differs 

 in its leaves being softer, scarcely at all margined, and with a short 

 nerve, whilst the stipules have hardly any nerve at all. There is also 

 a decided, but very short nerve in the perichetial leaves. 



Species dubi^e. 



31. Hypnum rigidum, (Schwaegr. Suppl. II. p. 189,) 

 " erectum, apice ramosum, foliis subdistichis remotis ovatis 

 acutis binervibus serratis." Schwaegr. 



Pterygophyllum rigidum, Brid. Meth. Muse. p. 150. 



Hab. Supposed to be a native of South America. 



Mr. Arnott seems to be of opinion that this may prove the same with 

 Hookeria scabriseta ; but its fructification being unknown, we cannot 

 speak with certainty. The author compares it with H. albicans. 



32. Hypnum duplicatum, (Schwaegr. Suppl. II. p. 198.) 

 " repens, ramis simplicissimis, foliis bifariam imbricatis ob- 

 longis acutis basi semiduplicatis enervibus integerrimis." 

 Schwaegr. 



Hab. In the Isle of Bourbon. 



The fruit of this species also has not been discovered. Schwaegrichen 

 ^observes, that it strongly resembles H. diaphanum, (our Hookeria dia- 

 phanaJ) 



33. Hypnum splachnifolium, (Aubert; Brid. Suppl. Muse. 

 2. p. 101.) "repens, subramosum, foliis bifariam imbricatis 

 lanceolato-subulatis longissime reticulatis, operculo longiros- 

 tri." Schwaegr. Suppl. 2. p. 193. 



Pterygophyllum? splachnifolium, Brid. Meth. Muse. p. 150. 



Hab., 



The calyptra of this moss is unknown. 



34. Pterygophyllum jungermannoides (Brid. Meth. Muse. 

 p. 152.) " caule repente basi erecto simpliciter pinnato, foliis 

 remotis distichis oblique ovato-cuspidatis serrulatis nervo 

 evanido siccitate undulato-rugosis, teguminibus unius seriei 

 appressis cordato-acuminatis." Brid. 



Hab. New Holland, Desfontaines. 



This moss, of which no fructification has been discovered, seems near- 

 ly allied to Hookeria laricina and rotulata. 



35. Hookeria Jlabellata, (Smith in Linn. Trans, v. ix. p. 

 280.) " caule erecto, ramis sparsis pinnatis, foliis distichis 

 complanatis, apice serratis." Smith. 



