39° 



DISCOVERY REPORTS 



The canals in the tentacular lappets (Fig. lo) are few in number, 5-6 only, and very 

 broad and strong. They have a different form of ramification to that figured by Maas 

 {he. cit). The middle ones 

 run parallel, and are mostly 

 branched centrifugally in the 

 distal parts ; the lateral canals 

 are only branched laterally 

 outwards through their whole 

 length. The tentacles always 

 arise between the origins of 

 the canals into the lappets. 



The stomach is 45 mm. 

 in diameter and relatively 

 large, and shows a network 

 ("Tafelung") on the surface 

 of the subumbrella. 



The colour of the muscles 

 and tentacles is greenish 

 yellow. The canals in the 

 lappets are whitish and dis- 

 tinctly visible in the com- 

 pletely transparent jelly. 



The locality in which this 

 specimen was found is remarkable ; for South Georgia is sub -Antarctic, and the species 

 is said to be found only in Antarctic waters. 



Desmonema chierchiana, Vanhoeffen (Fig. 11) 

 St. WS 89. 7. iv. 27. Between the Falkland Islands and Patagonia. Large otter trawl, 28-21 m. 



One badly damaged specimen without tentacles or mouth arms; gonads feebly developed; the 

 margin of the bell is well preserved. 



The exumbrella is flat and smooth. The jelly is here much harder and more resistant 

 than in the preceding specimen. On the lappets there are many fine longitudinal radial 

 ribs or warts. The medusa, lying on its back in a basin with the margin of the umbrella 

 folded inwards, shows very clearly sixteen radial furrows on the periphery of the ex- 

 umbrella. The diameter of the bell, with the margin turned outwards, measures 

 ±180 mm. in diameter, and turned inwards ±140 mm. The tentacular lobes are 

 35-40 mm. in breadth and 20-25 mm. in length. The ocular lobes are of the same 

 length or a little shorter, but much narrower, being only ±15 mm. broad. There is no 

 sharp indentation between the tentacular and the ocular lobes. The tentacular ones are 

 bluntly rounded, and more irregularly bordered, with a round incision in the middle 

 (see Fig. 11). The stomach is circular in outline, about 50 mm. in diameter, and 

 obviously small. The tentacular pouches are ±35 mm. broad at their distal margin, 



Fig. 10. Desmonema gaudichaudi, hesson. 

 Sector of the bell with a few canals in the lappets after injection with 

 Delafield's haematoxylin. One row of a few thick tentacles (partially 

 torn away). X i. 



