. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 340 DISCOVERY REPORTS. longing to this genus. In spite of the relatively small size and feeble development of the gonads in most of the specimens, which certainly are not yet fully developed, the principal characteristics are distinctly to be seen: the more or less cylindrical form, the mesogloea not thickened at the apex, the feebly formed pillars, the large wide stomach, the transparent, well-developed, crescent-shaped mesenteries, and the gastric filament arranged in vertical interradial rows
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 340 DISCOVERY REPORTS. longing to this genus. In spite of the relatively small size and feeble development of the gonads in most of the specimens, which certainly are not yet fully developed, the principal characteristics are distinctly to be seen: the more or less cylindrical form, the mesogloea not thickened at the apex, the feebly formed pillars, the large wide stomach, the transparent, well-developed, crescent-shaped mesenteries, and the gastric filament arranged in vertical interradial rows along the sides of the stomach. The gonads, however, which are absent in four specimens, are developed in two specimens as broad, unfolded, plainly bordered leaves, running al- most from the apex to the velarium, and have more the shape usually de- scribed in Charybdea. As previously mentioned, however (1930, p. 9), I believe that the grade of folding of the border of the gonads depends very much on the age of the specimens. The description given by Mayer (191 o, p. 513) is better than his figures (pi. 57, figs. 2, 2'). I therefore give in Figs. I a-c somewhat schematic sketches of the whole medusa, of the velarium and the sensory pit, and believe it convenient to add some details con- cerning the present specimens. The FORM OF THE BELL is Cylindrical with a widening in the middle part (Fig. I a). The EXUMBRELLA of the medusa is, in the upper parts, thickly covered with small or larger, oval or round, wart-like, colourless clusters of ne- matocysts. Towards the proximal part of the umbrella they diminish in size. The velarium and the pedalia are absolutely free from nematocysts; Mayer writes that both are covered with large white wart-like clusters. The CORNER PILLARS are very feebly protruding. The PEDALIA are very variable both in length and breadth (see Table I). The up- wardly directed diverticulum of the canal in the pedalia on the outer side of the base, described by Uch
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
