10 MARINE ALG.E 0? THE AT13U0ATII DISTRICT. 



general habit was nearer rbscitm than either. At Prof. Hauss- 

 knecht's suggestion, I will attempt to describe this form :— Plant 

 two feet high or more, branched from below the middle. Stem 

 terete, with two very faiut pubescent lines, nearly glabrous. Leaves 

 all distinctly petioled, slightly but regularly sinuate-denticulate, 

 somewhat rounded at the base, lanceolate or oblong-lanceolate, 

 subacute, glabrous on both sides ; lower opposite, upper alternate. 

 Puds pubescent, erect, subapiculate. Petals | in. long, very pale 

 pink, becoming rosy. Stigmas clavate, but rudimentarily four- 

 lobed. Capsules extremely sleuder, 1^-2 in. loug. Seeds un- 

 developed and shrivelled. [The form of ■parvifiorum in this locality 

 is glabrescent, so that the same thing is natural in its offspring] . 



E. (obscurum x palustre) x obscurum. Sandy ride in a fir- 

 plantation near Tilford ; several plants (the same station wbere I 

 found palustre x parviflonm in 1888). These I had tbought might be 

 Lamyi x palustre, but further study does not encourage that theory ; 

 nor do they quite match such specimens of simple obscurum x 

 palustre as I have seen. On the other hand, there is no trace of any 

 different species, and the stigmas are clavate. They have deep- 

 green leaves, bright rose-coloured flowers, expanding more than is 

 usual in obscurum; and the young capsules are ashy-white with 

 appressed down. Roughly speaking, they are much like what one 

 would expect to result from the suggested combination. 



MARINE ALG.E OF THE ARBROATH DISTRICT. 



By James Jack. 



The district is bounded by Arbroath Bay (including it) on the 

 south, and extends to the crumbling rock beyond the sandstone and 

 conglomerate of the Red Head. The locality has been by no means 

 well examined, but the following plants collected are the result of a 

 paper contributed to the Arbroath Natural History Association, the 

 practical work being done during the past summer months. The 

 classification and nomenclature adopted in the following list are 

 taken from Harvey's ' Phycologia Britannica,' as being the work 

 at the present time most generally referred to. 



Halidrys siliquosa Lyngb. Common in all pools about half- tide 

 level. 



Fucus vesicidosus L. Abundant on all low-lying rocks exposed 

 above low water. — F. serratus L. Common on rocks between tide- 

 marks. — F. noilosus L. (Ascophyllinn nodosum Le Jolis). Common, 

 generally growing in patches on boulders. — F. canaliculatus L. 

 (Pdcetia canalioulata Decne. & Thur. ). Common on rocks above 

 half-tide level, and exposed for several hours daily. N.B. — The 

 growth of Fuci is not so abundant on the old red sandstone as 

 among the boulders of the conglomerate. 



Himanthalia lorea Lyngb. Common on all exposed rocks at low 

 water. 



