THE FERNS OF NORTH-WESTERN INDIA. 319 



from the normal, due probably to difference of altitude or climate, but 

 insufficient to prevent identification or to warrant separation as a species. 

 To such "forms " separate numbers are not given. So-called varieties, 

 when distinct enough from the so-called types to be separately describ- 

 ed, and, so far as I know, constant as to characters, are given as species 

 in the absence of any good reason why they should be given any less 

 important a position. Most of these were originally named or described 



CORRECTIONS. 



Vol. XII., page 319, bottom line, for '' Naphrodium " read "Nephro- 



dium." 

 „ „ 323, 20th line from top, for " West " „ "East." 



„ „ 411,17th „ „ bottom, for "holes" „ " boles." 



„ „ ., 20th „ „ „ ,, "general" „ "genial." 



„ „ 412, 8th „ „ top, for " Bifosoma " „ ''Ligosoma." 



9th „ „ „ „ "digested" „ "ingested." 



?> « 55 ^^^•^ }> J> 5) 3> ^^g 



by authors as growing in India, the types of which are expressly stated 

 as not having been found in that region. Thus, after giving an elabo- 

 rate description of Aspleniuni (Athi/rmm) Filix-foimina, Bernh. [forma 

 europcea), apparently by himself, Mr. Clarke goes on to say that 

 the typical form has not exactly been got in the Himalaja, and to give 

 no less than seven varieties of ft, which have been got there, with a 

 short description of each. In this case Colonel Beddome, in his 

 " Handbook," follows Mr. Clarke almost verbathn, giving all seven 

 varieties. At least two of these, A. Schimperi, A. Br., &ud A. pedi- 

 nalum, Wall., which have widely creeping and branching rhizomes or 

 sarmenta and distantly springing fronds instead of the erect caudex and 

 fasciculate vernation of A. Filix-fcemina, have been recognised as good 

 species by Colonel Beddome in the Supplement to his " Handbook." 

 In the other instance, that of Naphrodium {Lastrea) FilLv-mas, Rich., 



