■ 



416 ' MR. :F. kitten — list or DIATOMACEiE. 



known to the natives in the Zambesi and Zanzibar districts as 

 being capable of yielding dyes, or of being otherAvise ntilized in 

 the domestic arts. Nor could I find any trace in New Zealand 

 or Australia of the application by the natives of lichens in dyeing 

 or otherwise. On the other hand, their use seems to be abun- 

 dantly recognized in India — my friend Mr. Cooke, of the India ^ ■ 

 Museum, having some years ago submitted to me for examination 

 a series of specimens, embracing several genera as well as species, | 



of lichens which are currently used by the natives as dye-giversf- 



J I 



List of Diatomacea? collected by Dr. David Lyall, R-lSr., of the 

 N.W, Coast of British North America Boundary Commission, 

 1858-59. ByP. KiTTE^'jEsq. Communicated by Dr. Hookeb, 



!F.K.S, 



[EeadNov. 1,1866.] 



The Algse and Zoophytes collected by Dr. D. Lyall during 

 the survey of the north-west coast of British North America 

 (extending from 'Fort Colville to the Eocky Mountains) are 

 in many instances thickly invested with filamentous and stipitate 

 Diatomacese. The most abundant is Isthmia nervosa: in many 

 specimens its growth has extended nearly half an inch from the 

 surface of the Alga or Zoophyte to which it was attached. The 

 next in abundance is Tricerathim arcticiim^ in filaments : this species 

 was first found concatenate on zoophytes from Vancouver's Is- 

 land ; and an able paper upon it, by T. C. S. Eoper, Esq., F.L.S., 

 will be found in the Transactions of the Microscopical Society of 

 London, vol. viii. p. 55. Specimens of Alg^ from Fuca Strait 

 were also thickly covered with Bliabdonema minutum^ Podos])Tienia 

 gracilis and P. Elirenlergii. 



The * denotes that the specimens occur very rarely. 



* AracJinoidiscus Elirenhergii. 

 SidditlpTiia Jtoperiana, 



I 



Cocconeis scut ell um^ small form. 

 Fragilaria striatula, 



Grammafoj)7iora marina, 



Gomjplionema, sp. ? 



ITgalodiscus {Podosira /) subtilis. 



t Vide paper " On the Dye-stuffs of India and China," in the ' Tecti^iologist/ 



Waste 



) 







by P- L. Simmonds, (London, 1862) p. 264. 



