386 , DISCOVERY REPORTS 



was not a closing net haul. In the closing net catch from St. 395 (north-east of South 

 Georgia) six specimens were caught at a depth of 1 500-1600 m. The maximum occur- 

 rence is therefore in a layer between 1200 and 1600 m. 



In both basins of the South Atlantic the species lives in the sub-Antarctic or 

 Antarctic intermediate water — in the so-called " Subantarktische Zwischenstrom " of 

 Wust. The specimens at Sts. 407, 107, 256 and 76 were taken in this water, which 

 has a low salinity: at these stations it was about 34-35-34'457oo- South of about 

 40° S. A. chiini was found in different water, with a salinity of 34-65-3475 %o> which 

 flows southwards below the north-flowing Antarctic water. (Here I follow the 

 suggestions given by Mr G. E. R. Deacon.) The previous records of A. chtmi 

 (' Valdivia ' and ' Scotia ') show a salinity of 347 7„„ . According to Wiist's temperature 

 section (1928, pi. xxxiv) A. chuni occurs in a layer of minus temperatures as well as in 

 water from o to 10° C. 



Table IX 

 Showing the bathymetrical distribution o/AtolIa chuni, Vanhoeffen 



Order SEMAEOSTOMEAE, L. Agassiz, 1862 

 Family PELAGIDAE, Gegenbaur, 1856 

 Genus Pelagia, Per. and Les., 1809 

 Pelagia noctiluca, Forskal 

 30. X. 26. 9° 55' N, 18° 34' W, south of Cape Verde. 2 m. tow-net, 0-200 m. 

 Two badly preserved specimens of about 20 mm. diam., gonads yellowish. 

 St. 280.1 JO. viii. 27. 00° 36' S, 8° 28' E, Gulf of Guinea. Young fish trawl, 200-100 (-0) m. 



Four specimens, 21, 23, 23, 25 mm. diam, 11, 17, 17, ? mm. high; two vaulted, two vase-like, 

 warts round, gonads yellowish pink. 



1 From this station there exists a coloured sketch from a living specimen with vivid colours, umbrella 

 reddish, tentacles and mouth arms with a bluish or violet hue. 



