182 BEiTiSH SEA-WEEDS. \Tl]io(losperm€m, 



It is extremely rare, having been found in Ireland only by 

 Mr. M^Calla, at Roundstone Bay ; and in England by Mr. 

 Eohloff, at Plymouth. It has been found in France. It is 

 as beautiful as it is rare. There is a lovely figure of it in 

 Phyc. Brit.j Plate lxxyii. It would not be very easy to 

 distinguisli it from one or two of the greatest beauties of 

 this genus, were it not for a curious Httle pinnule at the axil 

 of the pinnae. 



17. CaLLITH AMNION GRACILLIMUM, Arjcirdh. " Fem- 

 leaved'^ Callithamnion , Mrs. Griffiths. (Plate YI. fig. 21, 

 a tuft ; on the left, a plumule, magnified ; and under it a 

 iDranclilet with a tetraspore, and another with a favella, both 

 magnified.) 



Hab. On mud-covered rocks. Mrs. Griffiths, pier at 

 Torquay ; Miss TTarren, Falmouth ; Mr. Ealfs, Milford 

 Haven; Rev. W. S. Hore, Dr. Cocks, Mrs. Gulson, and 

 ^Irs. Spode, at Beaumaris. 



Finely branched, with the tetraspores on the tops of the 

 l)ranchlets, and the favellfe at the base. 



In looking at these beautiful works of God^s hands, one 

 would require an additional stock of epithets of admiration. 

 Hc<u' what Professor Harvey says respecting it: — "This 

 extremely elegant plant, perhaps truly the most graceful oi 

 the very beautiful genus to which it belongs, was first 



