TRACHYMEDUSAE 59 



with about 96 tentacles; the jelly is soft and fairly thick; the stomach is short and broad, of a deep violet 

 colour, its upper part with 16 radial folds; it is turned inside out (PI. V, fig. 5). The eight gonads are 

 almost globular, reddish-brown, of somewhat unequal size, somewhat pendent (PI. V, fig. 6), but 

 not elongated as in Vanhoflfen's much larger specimen; they are placed near the base of the stomach, 

 but distinctly separated from it. Vanhoffen describes the inner surface of the stomach as seen when the 

 mouth is widely open; four ridges run from the four lips of the mouth, and between them are seen 

 short, triangular valves and farther inwards some other similar structures. In the present specimen 

 the stomach is still more widely open, so that the lips cannot be seen from below. The internal surface 

 of the stomach shows eight broad swellings separated by deep, narrow furrows, each of the swellings 

 with a median, flat, longitudinal ridge continued in a pointed, tenon-like prolongation towards the 

 centre of the stomach cavity; these prolongations may correspond to the 'Blattchen' described by 

 Vanhoffen. The swellings and radial folds of the stomach are not gonads; these are only developed 

 on the radial canals. Apart from the minor details in the structure of the stomach wall, this specimen 

 agrees so well with the description of A. australe that I do not hesitate to refer it to that species. 



Distribution. Previously known only from the Gauss Station near the Antarctic Continent, in 

 about 90° E; now also found farther north in the Indian Ocean, about midway between South Africa 

 and South Australia, in the deep and intermediate layers. 



Amphogona apicata sp.n. 



(PI. V, fig. 7) 



Occurrence: St. 89. 28. vi. 26. 34° 05' 15" S, 16° 00' 45" E. West of Cape of Good Hope. Net: TYF looo(-o) m. 



I specimen. 

 St. 102. 28. X. 26. 35° 29' 20" S, 18° 33' 40" E. West of Cape of Good Hope. Net: N 70 ¥750-500111. 2 specimens. 

 St. 1575. 24. iv. 35. 18° 33' 12" S, 41° 35' 24" E. Mozambique Channel. Net: TYFB 800-550 m. 2 specimens. 

 St. WS 22. 30. xi. 26. 53° 38' S, 35° 35' W. North of South Georgia. Net: N 70 V 1000-750 m. 2 specimens. 

 St. WS 70. 23. ii. 27. 51° 58' S, 55° 42' W. East of Falkland Islands. Net: N 70 V 1000-750 m. 2 specimens. 



One of the specimens from St. 102, 4-5 mm. in diameter, is chosen as the holotype. 



Description. Umbrella dome-shaped, as high as wide or slightly higher, diameter up to 7 mm., 

 height up to 8 mm., with a distinct, bluntly conical, gelatinous apical projection, lateral walls thin. 

 Velum broad. The stomach is mounted on a small gelatinous peduncle as long as one-sixth of the 

 height of the bell cavity. Manubrium tubular, length up to one-third of the height of the bell cavity ; 

 in the contracted state it may be urn-shaped, almost concealing the peduncle. Mouth with four short, 

 simple lips. Eight narrow radial canals. Gonads sac-shaped, pendent, on the radial canals, in or a 

 little above the middle point of the canals; the gonads are usually of somewhat different size, but large 

 and small gonads are not always regularly alternate. In each of the specimens examined, the gonads 

 are of one sex. Ring-canal narrow. About 64 tentacles. Statocysts? Specimen colourless when 

 preserved in formalin. 



Remarks on specimens of different sizes : 



Diam. 3 mm., height 4 mm. (St. 102). Only four gonads are developed, and they are not placed crosswise. About 

 5 tentacles per octant. 



Diam. and height 3-5 mm. (St. WS 22). Eight gonads like small dots, a little above the middle of the canals. 

 About 4 tentacles per octant. 



Diam. and height 4 mm. (St. WS 22). Gonads in the middle of the canals, all with large eggs. The stomach is 

 strongly contracted, short and broad, concealing the peduncle which is only seen as a small conical prolongation 

 from the apical jelly into the cavity of the stomach. About 4 tentacles per octant. The specimen is well preserved. 



Diam. and height 4 mm. (St. WS 70, two specimens). Gonads in the middle of the canals, sac-shaped, of different 



sizes, large and small not regularly alternate. About 6 tentacles per octant. 



8-2 



