Muscologia Itineris Assamici. 



473 



Anhymenium I have ventured to propose as a new genus, 

 retnarkable for the proportionally very small teeth of the 

 outer peristome, and for the great development of the pro- 

 cesses of the inner peristome, considered relatively to the al- 

 most total absence of a basilar membrane. In this instance, 

 the disparity between the membrane and the processes, in 

 favour of the latter, is greater even than in Climacium. 



Pleuropus, the second genus, which appears to me new, 

 has the same relation to Leskia, etc. that Brachymenium 

 has to Bryum. From the former genus it is alone distinguish- 

 able by the laterality of its setae, and the accompanying 

 difference in habit. 



Almost the whole of the above descriptions were made 

 from dried specimens. I trust that considerable indulgence 

 will be shewn to the numerous errors that must exist, espe- 

 cially as regards the fabrication of new species. Advice in 

 Muscology is not to be obtained in India ; and my means of 

 consultation are limited to Bridel's Bryologia Universalis, 

 the Musci Exotici of Dr. Hooker, and the Muscologia Brit- 

 tanica of Dr. Hooker and Taylor. In means of comparison 

 with authentically named specimens, I am altogether defi- 

 cient : owing to this, I have not ventured to meddle with 

 either Leskia or Hypnum, under any circumstances a busi- 

 ness of some difficulty, but one to me almost insuperable on 

 account of the unnatural arrangement of Hypnum by B ridel. 



Sequence of the genera of the Muscologia Itineris Assamici. 



No. of 



species. 



I 



■Jo. of species. 



1. Sphagnum, 



... 1 



10. Griramia 



• ■ • • • ■ O 



2. Polytrichum, 



... 6 



11. Treraatodon, 



■ * a a a a -J 



3. Diphyscium, 



... 1 



12. Dicratmm, 



13 



4. Gymnostomura, 



... 7 



13. Fissideus, 



• •• ••■ X\j 



5. Orthodon, 



... 1 



14. Didymodon, 



• a a a • a 'X 



6. Orthotrichum, 



... 5 



15. Funaria, 



2 



7. Schlotheimia, 



... 1 



16. Bartramia, 



■ • • • *• o 



8. Weissia, ... ... ... 



... 3 



17. Brachymenium, 



• • • • ■ • O 



9. Barbula, 



... 3 



18. Bryum, , 



• • • • • • f 



