2G8 THE .TOURNAL OF ROTA>rY 



belched forth from their chimney stacks," and it may be that the 

 consequent increase in amount of dissolved salts in the water is 

 slowly annihilating the Desniids (c/! West, Algcs, vol. i.). 



In connection with the disappearance of some of the forms in 

 Bates's list the case of Batrachosperinuin may be quoted. He found 

 B. moiiiliforme, together with its var. setigerum Kabenh., and also 



B. atriim Harvey. Attempts have been made to collect from the 

 same localities as Bates, but so far no trace of this alga has been 

 found. 



It may be well here to mention a few instances in which the 

 former list has been extended. Bates found six species of Vaucheria ; 

 to these have been added V. racemosa, V. uncinata, and Y. liamata 

 (Vauch.) Lyngb. His (ICJogoniums have been extended by the 

 addition of (E. cri/pioponim, CE. (/ra?ide, and CE. sociale : his Cos- 

 mariums by C. holmiense Lund, var, integrum, C. liumile Gray., and 



C. grannfnm Breb. 



The foregoing notes are fragmentary in character, but they serve 

 to indicate some of the points brought out in examining these collec- 

 tions. 



I wish, in conclusion, to thank Professor F. E. Fritsch for his 

 help and for the facilities afforded by him for consulting his algo- 

 logical library at the East London College. 



NORTH SOMERSET MOSSES. 

 Br Cecil P. Hurst. 



Mr thanks are due to Messrs. H. N. Dixon, H. H. Knight, and 

 J. A. Wheldon for kind notes and assistance received in compiling the 

 following list which contains seven new vice-comital records, to which 

 an asterisk is prefixed, and consists of mosses observed growing near 

 Burnham-on-Sea in North Somerset (v.c. G) during the winter 1916- 

 1917:— 



Campylnpus! hreiupilus B. & S. On peat between Ashcott and 

 Shapwiek {teste D/.ron) ; this species was also foimd near Shapwick 

 by Mr. W. B. Waterfall, a record given in Mr. W. Watson's " The 

 Mosses of Somerset" (v. Proc. Somerset Arch, and Nat. Hist. Soc. 

 vol. Iviii. 1912, part 11, pp. 114-164). 



Fissidefis incurvus Starke. Plentifully on a bank by a stream 

 near Edithmead, where I also found a few plants in an orchard. 



Grimmia maritima Turn. Significantly of its avoidance of lime, 

 this species Is unrecorded for the calcareous vice-count}^ of North 

 Somerset, while there is only one record for S. Somerset in " The 

 Mosses of Somerset," above referred to — G. orhicularis Bruch. On 

 walls between Burnham and Berrow. 



*Tortula IcBvipila var. IcevipilcBformis Limpr. Not uncommon 

 on trees by watercourses near Burnham ; Mr. Dixon writes : — " I 

 should call the var. IcBvipilcBformis a good variety, with the border 

 distinct as well as the propagula numerous " — T. ruraliformis Dixon. 



