G76 



DR J. H. HARVEY PIRIE ON DEEP-SEA DEPOSITS 



— J. H. FI. P.], containing the strongest silicified remains of pelagic diatoms, 

 type belong the following samples : — 



'o this 



No. 3. Diatom ooze from 

 4 



5. ,, ,, ... 



23. Sandy mud from 



26a. Transitional Glacial mud — Diatom ooze 



266. Diatom ooze or Volcanic sand from 

 27. ,, ,, ,, 



39. Glacial clay from 



45. Diatom ooze or Volcanic sand from 



46. Diatom ooze from 



. 58° 22' S., 



45° 00' W., 



1698 fathoms 



. 59° 32' S., 



43° 10' W. 



2307 , 





. 59° 42' S., 



34° 13' W. 



1325 , 





. 61° 05' S. 



43° 20' W. 



214 , 





;e from 59° 43' S. 



48° 10' W., 



2110 , 





. 59° 23' S. 



49° 08' W. 



2180 , 





. 58° 28' S. 



51° 56' W., 



2168 , 





. 71° 32' S. 



17° 15' W., 



1221 , 





. 56° 58' S. 



10° 03' W., 



2518 , 





. 51° 07' S., 



9° 31' W., 



2103 , 





Common to all the samples are the following species : — 



Fragilaria antarctica (Schwartz), Castra9ane. 

 Rhizosolerda styliformis, Brightw., ends of cells. 



,, bidens, Karst, ends of cells. 



Eucompsia Balaustium, Castr. 

 Biddulphia Weissflozii, Jan. 

 Adinocijdus OHverianus, O'Meara. 



Coscmodiscus planus, Karst (and other closely 



connected forms). 

 Ooscinodiscus ocidus iridis, Ehr., different forms, 



difficult to identify with certainty from the 



often corroded specimens. 



I cannot point out any clear difference between the various samples of this type. 

 " (2) Deposits from the littoral zone of the S. Orkneys : — 



No. 24a. Uruguay Cove . 

 24ft. Scotia Bay . 

 24c. Scotia Bay . 

 25a. Off Coronation Island 



5-10 fathoms. 

 5-10 „ 



These samples are all very rich in littoral and ice diatoms. Nos. 246 and 25a [the 

 former from well out in the centre of Scotia Bay, the latter from open water on the 

 north coast of Coronation Island — J, H. II. P.] contain also the same plankton species 

 as the samples of type 1. But dominant are the following species, which occur more 

 or less abundantly in all the samples : — 



Amphora proteus, Greg. 

 Navieula aspera (Ehr.). 



,, brasiliensis, Grun. 



„ diri'da, W. Sm., dominant in 24a. 



,, jejunoides, Van Heurck. 



,, quadratarca, A. Schmidt, dominant in 

 24c. 



„ Smithii, Breb. 

 Pleurosigma kerguelense, Grun. 



,, medite7'ra7ieum, Cleve. 



Gomphonema kamtschaticmn, Grun. 

 Amphiivora Kjellmanii, CI. 

 Acijnanthes groenlandica, Grun. 

 Cocconeis antujua, Temp, and Brun, with varieties. 



Cocconeis cost at a, Greg, with varieties. 

 Nitzschia distans, Greg. 

 Entoyyla australis, Ehr. 

 LicJunvp/iora Reichardtii, Grun. 

 Gravimatoplwra monilifera, Brun. 

 Melosira sol (Ehr.), Kutz. 

 Podosira maxima, (Kutz), Grun. 

 Idhmia enervis, Ehr. 

 Biddulphia ardica (Brightw.). 



,, Ottomulleri, Van Heurck. 



Chxtoceras, sp., resting spores. 

 AdinoptT/dius undulatus, Ehr. 

 Aradmodiseus Ehrenhergii, Bail., var. indicus, Grun. 



