\I\KIM: AH..K "i mi n NATIONAL ANTARCTIC EXPEDITION. 81 



lateral \vins. r'rom /'. pfeurosporum it differs in being very proliferous, and in the 

 imt lirinir 'niiHuciit uvtT tin- costa. The sori, in fact, resemble those of Hypo- 

 </l.i!tiiiii tlt'ntii-nlntniii a- li^im-d in Kiitzing's Tnli. /'/(//.. xvi. tab. 15, 1 ("Pteri" 



. .1. Ag.). De Tnni divides the geuus Pteridium into three sections, tin- 

 first of which contains species with n " frons terctiuscula," which our plant has not ; 

 the second section lias an obsolete costa; and the third shows a difference in the form 

 and disposition of tin- cortical cells, which cover the costa and the frond, when seen in 

 surface view, besides having lateral veins. Our plant therefore falls into none of these 

 sections. It may be thought that P. proliferum approaches more nearly to Hypoylo*- 

 sum ; but from that genus it differs in being branched, as well as proliferous. From 

 A'/y //><//. >.,/ //i it differs in having proliferations emerging from the costa, and in the 

 similarity in form and size of the cortical cells of costa and frond. It differs from 

 Reinsch's Delesseria cotulensala in having a much less strongly marked costa, and in 

 being proliferous. 



26. PTBRONIA PKCTINATA, Schmitz (**Polysipfionia pectinate, Hook, and Harv.). 

 Scotia Bay, South Orkneys, July and December 1903. 



Geographical Distrilmtinn. Cape Horn, Falklands, South Georgia. 



Reinsch (loc. cit., p. 374), in his note on this plant, says he believes it had never been 

 figured. But he had overlooked the coloured figure in Harvey's Nereis Australia, 

 tab. xxvii., which represents part of the thallus of a specimen from the Falklands 

 collected by Mrs Sulivan, spelt " Sullivan " on the original in Herb., Kew, where there 

 is on original drawing showing the structure, habit, and cystocarp. One of the Scotia 

 specimens was growing attached to Hydrolapathum stephanocarpum. 



27. PCTLOTA CONPLUKNS, Reiiisch. Scotia Bay, South Orkneys, October 1903. 

 Three incomplete plants without fruit. 



Geographical Distribution. South Georgia. 



This species is described and figured by Reinsch (loc. cit., p. 376, tab. iii. figs. 5-9). 

 His figure of a portion of the frond, being reduced to one-third its natural size, is not 

 very helpful in determination. The figures of the structure, combined with the clear 

 diagnosis and remarks, are, however, enough to enable us to recognise our plant as 

 P. confluent. Reinsch remarks that the axillary cell in his specimen has almost dis- 

 appeared. In our plant it is still quite clear. 



28. CRYPTONEMIA LUXURIANS, J. Ag. Off Brazil, same locality as No. 3. 

 Geographical Distribution. Brazil, Martinique. 



29. FLORIDEA, A. and E. S. Gepp in Journ. of Bot., xliii., 1905, p. 193, tab. 472, 

 figs. 1. 2. 



Frons cartilaginea plana, 23 cm. lata, irregularitcr laccrata et fenestrata laevis, 

 stratis duobus contexta ; cellulis interioribus majusculis (35-70 M long., 15-25 M lat. ) 

 irregularibus rotundato-angulatis vel plus minusve axin versus perpendiculariter elon- 



VOL. III. 11 



