6 DR. G. DICKIE 03 THE AXGJE FOUND 



On the Algse found during the Arctic Expedition. 



By a. DickM, M.D., F.L.S. 



[Bead December 20th, 1877.] 



The following report on Algse procured during the Arctic Expedi- 

 tion, under the command of Captain Sir George Wares, is founded on 

 collections made by Captain Peilden, Dr. Moss, and Mr. Hart, who 

 were equally assiduous in collecting and observing. Most of the 

 materials submitted to me were procured beyond lat. 78° N. ; and 

 the notes embrace those only observed from that to the extreme 

 point reached by the Expedition. As to the Diatomaeese, the loca- 

 lities where gathered are first given in numbered series, after which 

 comes a list of all the genera and species, with numbers corre- 

 sponding to the localities attached. This saves needless repetition, 

 is available for data concerning distribution, and at a glance shows 

 paucity or frequency of genera and species. 



The concluding summary shows the number of species found 

 as contrasted with those observed afc Spitzbergen. 



Sporochnace^. 



Desmarestia aciileata, Lamour. 



Bessels Bay, 81° 7' N., from 7 fathoms, and Discovery Bay, 

 81° 41' N., from 10 to 20 fathoms ; all very dwarf. 



LaminalKiace^:. 

 Lamhsabia longicruris, De la Pyl., and L. caperata, 



Be la Pyl. 



Both from Bessels Bay, the first rather fragmentary. 



Dr. Moss and Captain Peilden sent fragments of stems from 

 the mud of a raised beach on M Shell-Plat," 200 feet above the 

 present level of the sea, at Ploeberg Beach, N. lat. 82° 27', 

 61° 22' W- ; these seem to belong to one or both of the species 

 of Laminaria above mentioned. Captain Peilden remarks 

 that they retained the peculiar marine smell as strongly as re- 

 cent specimens. The beds from which the stems were taken 

 are exposed, by the action of a stream, to a depth of not less than 

 30 feet in thickness. Along w T ith them were found shells of Mya 

 truncata, Astarte boreal is, &c. 







