ZOOGEOGRAPHY 2I 9 



have been able to examine only the specimen from St. 124 which is definitely R. bongraini but the 

 other specimens are almost certainly the same. 



2. February-March Survey 1928, Sts. WS 145, 275-100 m., (1), WS 146, 500-250 m. (1), WS 149, 

 250-100 m. (1), WS 190, 750-0 m. (2), and 1000-0 m. (4). 



3. January-February Survey 1930, one specimen from St. 323, 250-100 m. 



Fig. 23 Fi S- 2 + 



Text-fig. 23. Occurrence of Rhynchonerella bongraini in the region of the Greenwich Meridian. Sts. 20x0-27, March- 

 April 1937; Sts. 2492-2501, November-December 1938; Sts. 2530-47, January 1939, N 70 V nets. 



Text-fig 24 Occurrence of Rhynchonerella bongraini ® in the region of the Greenwich Meridian. Sts. 1772-82, May-June 

 1936; Sts. 2311-22, April 1938; Sts. 2355-61, 2385-93, 2424 and 2425, July-September 1938, N 70 V nets. 



The sparseness of this distribution is in marked contrast to that found on the Greenwich Meridian and 

 around the South Sandwich Islands; this is particularly true of the top 50 m. of water. Disregarding 

 the catches at St. WS 190, where the nets were hauled from 1000 and 750 m. to the surface, there is no 

 record from 50-0 m., and only one specimen was caught by a net hauled between 100 and 50 m., at St. 

 WS 35, which, as shown by Hardy and Gunther (1935, fig. 41) fished in Weddell Sea Water. At St. 

 WS 112 (160-50 m.), the specimen may have been taken in Warm Deep Water at the lowest part of the 

 haul but if it was collected at the top of the haul, it would also have been taken in Weddell Sea Water. 



The remaining records of R. bongraini from the South Georgia Survey are from the upper layers of 

 Warm Deep Water, some of them north of the northern limit of Weddell Drift, and it is not unlikely 

 that this species inhabits this layer to the north, as far as the Antarctic Convergence. 



