84 Aleae. 



s=' 



rica only from two collections on the coast of Rhode Island and 

 Nova Scotia. 



Notes on Myrionetna Coniiuiae Sauvageau and its variety fila- 

 mentosa, in comparison with M. vulgare Thuret. In material collected 

 at Casco Bay, Maine, all intermediate forms between the type 

 and the variety were found. It occurs also at Woods Hole, Mas- 

 sachusetts and at Newport, Rhode Island, in each case on Lam/- 

 naria, on which it is found also in Europe. 



Rodochorton penicülifornie (Kjellm.) Rosen vinge is compared with 

 R. niemhranaceum and is reported from Rhode Island. 



Rhodomela lycopodioides (L.) Agardh, here reported from Maine 

 is compared with R. subftisca (Woodw.) Ag. 



Also critical mention of Lithodenna fatiscens Areschoug and 

 Conchocelis ros^a Batters , as to habitat, distribution and relationship. 



Rhododermis elegans Crouan , R. parasitica Batters and R. Georgii 

 (Batters) Collins, reported from the New England coast, are new 

 to the American flora. Maxon. 



Cotton, A. D., Marine Algae from the Chatham Islands. 

 (Bulletin of Miscellaneous Information , Royal Botanic Gardens. 

 Kew. NO. 2. p. 37—43. 1907.) 



This paper contains a list of 42 marine algae from the Chatham 

 Islands, collected by Miss Maltby. One new species is described, 

 the diagnosis of which is here inserted for the convenience of bota- 

 nists to whom the Kew Bulletin is not accessible. 



Rhodophyllis chathmnensis. A meinbranacea Harv. tetrasporangiis 

 in sorum collectis distincta. Species submembranacea, medio- 

 cris magnitudinis, flabellatim vel irregulariter ramosa; frons duobus 

 distinctis cellularum stratis contexta, cellulis interioribus majoribus 

 per duas series frondis piano parallelas dispositis, cellulis cortica- 

 libus minutis aspectu rosulato-areolato a superficie desunt; rami 

 5 mm. lati, subdichotomi vel flabellati, margine integro, segmentis ter- 

 minalibus angustioribus obtusis; venae nullae; cystocarpia in- 

 cognita; tetrasporangia secus mediam paginam incrassatam fere 

 in soro disposita, 40X93. Color brunneo-ruber. 



The author considers that this species is most nearly allied to 

 R. Brookenna J. Ag., while in form it often resembles 7?. meinbra- 

 nacea Harv. A Latin translation is given of the diagnosis of Litho- 

 thaninion cystocarpideum Fosl. which was published in Norwegian. 



E. S. Gepp. 



Holmes, E. M. , Callymenia Larteriae. (Journal of Botany. Vol. XLV. 



p. 85—86. March 1907.) 



The author describes a new species of Callymenia , C. Larteriae , 

 collected by Miss Larter in North Devon. The colour of the 

 frond is duller than that of the typical form of C. reniformis, or of 

 its var. nndulata , having more of a brownish red tint. The author 

 has seen no prolifications which attain the size of the original frond. 

 The plant bears cystocarps throughout the year, scattered over the 

 whole frond, except on the young prolifications. The paper opens 

 with a Short note on the varieties of C. reniformis. E. S. Gepp. 



Keissler, K. von, Planktonstudien über einige kleinere 



