MANN 



t)IATOMS OF THE ALBATROSS VOYAGES. 22,'> 



many instances of determining the ori-iu of the materials composinj,^ 

 the sea bottom in which they were {oiukL 



The investigations here reported are of value for the purposes jnst 

 mentioned mainly as a means of illustrating the necessity of wider 

 and more thorough work in this lin(>. Nor can these valuable results 



metliod 



s 



are added to those commonly iu vogue in sea dreclgiugs and surface 

 aatherinc^s. As both the expenditure (,f time and the expense iiici^ 



dent to combiuiug these researches with those already being earned 

 on would be insignihcant compared with the results to be obtained, 

 it is reasonable to hope that the necessary measures will b(^ taken 



In the body of this report there will l)e found many irferenccs to the 

 service the diatoms are capable of rendering in the determination of 

 sea currents and of the origin of sea bottoms. A few examples may 

 be cited here. In the United States cable survey from C ah orma to 

 the Hawaiian Islands and return," a long s(M-ies of souiulmgs from he 

 stations numbered 205511 to 3202II wen; [--!,|- ^^^^^^^'^ ';■ 



Hour. They constitute a practically unbr..kc„ .scncs i^m, 



with station 2912II in latitu.lc 155° 58' 30" W. longitude 22 IS 00 

 N nmnins westward to the Hawaiian Islands and on the re urn 

 Toya-e east ward ending at about the. starting point, namely at station 

 30 Sfl in latitude 155" 57' 30' W., lonsitude 21» 50 (0" X fins 

 fonn, therefore, is as truly a local species at llus pari of the sea as any 

 mnerogain is of a terrestrial locality. And t us rs confirmed by one 



!j II. LSudth's typesli.les, No. rm, equally r.ch u, tins rane , 

 which he says came from the " Tmcarnra s<,undn,ss south of Sand- 



ch Islands in 1,468 fathoms,- a depth .luphcated by several of th 



oundings in the series just referred to. Sumlarly on tl>e outward 



™ya.e ^t station 291711 a sounding was made conlamn.g, in ad.l. on 



to the quadrate «. favus already nientioned a nund^cr o other 



diatoms%s Cosdnodicus nodulifer Jan., Nav^c^,h «pera Mu-onh., 

 ... ,' , t:.,._.„u a;„..;,.,,;„ ^i.hnri;,],: Greff.. Ilrmuli^cus cunn- 



Namcu 



/■ 



,„». Wallich; and on the return voyage ^'^l''.""" V _ J , Jf,! 

 same diaton.s were found. The two stations difrcr m latitude onb 

 3"' and in longitude only 5' 30". This locality is therefore character- 

 ized by the foregoing co.ubination of species. Boyer" speaks, of 7v,rf- 

 iMil ™6c*;»a (Crev.) Boyer as quite rare and coming from 

 Pac fie soundings 20° 10' 00" .\. and 158» U' 00" A\ ., etc. I found it 

 hilar'e quantitresat 2,-21' 00" .X. an.l ,57° 09' 00-^y., namely, at sta- 

 tion ""o^ll So also Boyer discover...! his liijduli.lua hrhy, on the 



coast' o'f California; an.ril, is_^umhuit in the s.,un.ln^gs of .stalmn 



steamiT .Mulrois, Rt^p. V. S. r,.,„m. li»l,. 1900. ..S.-ol,-. l.«U. 

 iProc. A.-1..1. r,u,a. 1900: 7117. lUOl. 



