3 i2 DISCOVERY REPORTS 



probably reveal a wider distribution than is shown in the present record. Among other 

 minerals, white mica is noted at five stations (WS 604, WS 615, WS 617, WS 692 and 

 WS 697), tourmaline at one locality (St. WS 697) and a yellow mineral which appears 

 to be staurolite at Sts. WS 604 and WS 605 ; the last record, however, needs confirma- 

 tion. Finally, the authigenic mineral phillipsite is recorded from two stations (WS 602 

 and WS 650) which are separated by a considerable distance, at depths of 75 and 143 m. 

 respectively. The occurrence of phillipsite at such slight depth is unusual, judging by 

 Murray's statement that "it always occurs in the deeper deposits", but the mineral 

 appears to have a longer bathymetrical range than that recorded in the literature. 



Grateful acknowledgment is made of assistance during the course of this investigation. 

 The writer has had much helpful discussion with Professor P. G. H. Boswell of the 

 Royal School of Mines, London, under whose direction the work has been done. 

 Conversation with colleagues in the University of Liverpool has served to elucidate 

 many obscure details, while Dr Stanley Kemp and his staff have always been ready to 

 give information in amplification of the published records. The charts have been drawn 

 by Miss E. C. Humphreys. 



DESCRIPTIONS OF THE SAMPLES 



R.R.S. 'DISCOVERY' 



Station A. 29. ix. 25. Lat. 47 34' N. Long. 8° 20' W. 4287 m. 



Globigerina ooze. A greyish white mud composed of Globigerina fragments ; unbroken tests are 

 rather scarce. The finer fraction is extremely fine-grained and contains coccoliths in abundance. 

 Only occasional mineral grains are seen. 



Station B. 16. x. 25. Lat. 29 56' 50" N. Long. 15 03' 10" W. 3400 m. 

 Globigerina ooze. Similar in all respects to sample from Station A. 



Station C. 26. xi. 25. Lat. 22 32' 15" S. Long. 16 40' 10" W. 4330 m. 



Globigerina ooze. Similar to foregoing samples, but coccoliths and rhabdoliths in the finer 

 fraction are perhaps even more in eyidence. No mineral grains seen. 



Station D. 30. ix. 25. Lat. 26 07' 40" S. Long. 14 36' 20" W. 3195 m. • 

 Globigerina ooze. A light brown, coherent, granular deposit. Coarse washings consist prin- 

 cipally of foraminiferal shells of the genera Orbulina, Globigerina and Pulvinulina, with a few frag- 

 ments of echinid spines. Fine washings contain mainly minute particles, which include coccoliths 

 and rhabdoliths. 



Station E. 30. xi. 25. Lat. 26 17' 40" S. Long. 14 36' 20" W. 3170 m. 



Globigerina ooze. Greyish white in colour: foraminiferal tests mostly fragmentary. Coccoliths 

 and rhabdoliths both plentiful in the finer material. 



Station F. 19. ii. 26. Lat. 53 00' S. Long. 34 22' 30" W. 2472 m. (Plate XVII.) 



Diatom ooze. A typical and pure diatom ooze, with occasional Radiolaria and a few detrital 



mineral grains. The genera Coscinodiscus, Thalassiosira, Fragilaria, Achnanthes, Rhizosolenia and 



Thalassiothrix are noted. 



