226 



DISCOVERY REPORTS 



from others was comparatively poor, consisting of small pieces preserved in tubes. 

 C. nigrescens and C. kempt were dredged in large quantities, but C.fumosiis is represented 

 by one piece and the collection of C. densiis and C. hodgsoni is small. When the zooids 

 had been liberated from the coenoecium and fixed in Bouin's fluid, the results were good. 

 But when entire colonies were fixed and preserved, the zooids are not satisfactory for 

 sectioning, for as the colonies were put into the fixing media, the zooids rushed to the 

 ostia and blocked the passages, thus preventing the entrance of the fixing fluid. 



Following the Station List already published, the stations of R.R.S. 'Discovery' 

 are denoted by plain numbers and those of R.S.S. ' William Scoresby ' are distinguished 

 by the prefix WS. The symbols used for nets, apparatus, etc., are as follows: 



DLH. Large dredge. Heavy pattern, 4 ft. in length (1-2 m.). 



H. Horizontal. 



N 7-T. Net with mesh of 7 mm. (0-28 in.) attached to back of trawl. 



N 200. 2 m. tow-net. Mouth circular, 2 m. in diameter (6-6 ft.); mesh graded, at cod-end 4 mm. 



(o-i6 in.). 

 NRL. Large rectangular net. Frame 8 ft. long and 2\ ft. wide (2-45 m. x 0-7 m.), with bag of 



J in. mesh (12-5 mm.). 

 OTC. Commercial otter trawl. Head rope 80 ft. long (24-5 m.) ; mesh at cod-end li in. (3-8 cm.). 

 OTL. Large otter trawl. Head rope 40 ft. long (12-2 m.) ; mesh at cod-end i\ in. (3-2 cm.). 



The following tables give the geographical and bathymetrical distributions : 



Geographical distribution 



It is interesting to note that all the species of Cephalodisais except C. i/idiciis, C. levin- 

 seni, C. gracilis, C. sibogae, C. evansi and C. gilchristi have been obtained from the 

 Southern Ocean between latitudes 49° and 78° S and of these C. hodgsoni, C. solidiis, 

 C. densiis, and C. nigrescens have been recorded within the Antarctic Circle by previous 

 expeditions. The greater part of the present collection was obtained from the neigh- 

 bourhood of Palmer Archipelago, Falkland Islands and South Georgia lying between 

 latitudes 49° and 64° S. Only one broken piece of C. densns is from station 82 (South 

 Atlantic Ocean, 32° S). 



