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Description

"One very badly damaged specimen without stomach or mouth arms, and most tentacles tornaway; lappet zone only partially preserved. Diameter of the bell 120 mm. with lappets turnedutwards.

 

The jelly of the umbrella is very thin and fragile. The surface of the exumbrella on the lappets is perfectly smooth, and free of warts or clusters of nematocysts. The tentacular lobes are ± 23 mm. in length, 25-27 mm. broad ; their distal margin is without any incision or cleft, and almost evenly rounded. The rhopalar lobes are about 20 mm. long and 12 mm. broad. They are separated by deep incisions from the tentacular ones and are much more pointed than those of chierchiana. The whole marginal zone is relatively broad in comparison with the length of the broad and short stomach pouches, and much broader than in chierchiana (compare fig. 1, pl. i of Maas, 1908, of D. gaudichaudi, with Browne's (1910) fig. 2, pl. ii, of chierchiana).

 

The canals in the tentacular lappets (Fig. l0) are few in number, 5-6 only, and very broad and strong. They have a different form of ramification to that figured by Maas (loc. 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 ("Täfelung") on the surface of the subumbrella.

 

The colour of the muscles and tentacles is greenish yellow. The canals in the lappets are whitish and distinctly visible in the completely 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."

 

(Stiansy, 1934)

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Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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