DISCOVERY REPORTS 

 344 



j u-- ™;™ anrlm-een hornblende are noted. Apart from abundant 



Radiolaria. 



o ^ „(j> c T ntw 70° 38' ^o" W. 1 48 m. (Plate XXII.) 



are sponge spicules and grains . quam -f^, 1 ^*^^ ^2 1. There Je a few 



ST^t!^rS f r^^ Fo^nif.ra, «es,s are pWH Ending 



textularian, cristellarian and rotahne forms. 



t * 0°,.,'™"^ Innn 7i° 06' W. 2277 m. (Plate XXII.) 

 ££££!£ A o^t^/on^face of ,he sa'm'pie doring -** 

 UIATOM , , , „„ „ f _.,.-:,». flncculent aggregates which contains occasional angular 



^o'^iit^^^^^^ **■* *-■ Diatoms are not r 



SEf £££ unTmagfd frustules of Coscinodiscus are noted, together with sponge spicules. 



Station WS 639 10. vi. 31. Lat. 18° 44' S. Long. 70° 48' W. 1485 m. (Plate XXII.) 

 SgZjsmud A greenish brown mud, formed mainly of terrigenous material The mmera 

 erals nlde ngular fragments of quartz (o- , 5 mm.), green hornblende (o- , mm.) and volcanic ^ 

 fn mm There is some quantity of granular flocculent matter, sometimes in dense aggregates, 



of Coscinodiscus and Entopyla are present. 



Station WS 641. 19.vi.31. Lat. 1 8° 27' 30" S. Long. 70° 26' 30" W. 105 m. (Plate XXII.) 

 DuioJSoxis mud 9 This is a green mud very similar to the preceding sample. The terrigenous 

 materTmcludes angular grains of quartz and green hornblende, up to about 0-2 mm. in diameter 

 Xret a at proportion of flocculent matter, often in dense aggregates enclosing small mineral 

 ££L Coscinodiscls again is conspicuous by the size of the frustules, and other diatoms include 

 Navicula, Fragilaria, Actinoptychus and Amphora. 



Station WS 642. 19.vi.31. Lat. 18° 28' 24" S. Long. 7 o° 32' 12" W. 148 m. (Plate XXII.) 

 D "omachoos uJ. A irk green mud composed mainly of dense, green, *^W*£* 

 which are granular in appearance. This material contains brown resting spores and plentiful diatoms 

 Tf he "ZTcoscinoaZs, Actinoptychus, Thalassiothrix and Fragilaria. One example of Bact^as- 

 trumi seen to contain brown resting spores similar to, but smaller than, the loose spores n the 

 nTJent material. The mineral constituent consists mainly of angular grains of quartz and volcanic 

 glass, embedded in the flocculent "matrix". 



