iSo Dr. Goodenough and Mr. WooDWARd'jt Objervatiom on 



\w this fpecies a part of the frond is filiform and a part com- 

 p relied ; whence it might be confidered as doubtful under which di- 

 vifion it ought be arranged. We have thought proper to place it 

 here, becaufe much the greater part of the plant is linear and com- 

 prefled ; and becaufe the fpecimens which are found feparated from 

 their native rocks, have very rarely the lower filiform branches 

 adhering — and therefore, if it had been arranged in the next divi- 

 ilon, difficulties might have been occafioned in afcertaining a plant 

 not otherwife eafily to be miftaken. 



It partakes of the nature of the cartilagineous and membranaceous 

 feci) the lower filiform branches being entirely of the former, and 

 rhe comprefTed branches abfolutely of the latter defcription. The 

 fubulate erect teeth, which proceed from the margins of the fmaller 

 branches in a regularly alternate order, do not differ in fubftance 

 from the branches themfelves, and are like them comprefTed ; and 

 this circumftance prevents the poffibility of confounding this fpecies 

 with any other in the genus. 



The fructification has been hitherto unnoticed ; but we have 

 been favoured with fpecimens gathered by Dr. Withering on the 

 ihores of the Tagus, on which are difcernible extremely minute 

 tubercles, thinly fcattered on -the furface and on the margins of 

 the linear branches, almoft black, and apparently filled with feeds. 

 Befides thefe, in fome of the older fpecimens axillary nodules have 

 been difcovered, having the appearance of congefted tubercles ; but 

 we dare not pofitively afTert that they are fuch, and recommend it 

 to bctanift s rending on the fea-fhore carefully to examine the recent 

 plants, in order to ascertain the real nature of thefe excrefcences. 



The variety mentioned by Mr. Lightfoot, p. 926, under the name 

 of fi caudaius, has never yet fallen under our obfervation ; but that 

 t'nis is the Mufcoides Sp. PL p. 1630, cannot be doubted, that fpecies 



being 



