Medusae of the world . ) Sensory-club of the medusa-bud shown infigure 8. Fig. 10. Geryonia proboscidalis, with contracted manubrium. Drawingtwice the natural size. Nassau Harbor, Bahamas, April, 1907.(See page 425.) Figs. 11 to 11. JEgina rhodina. Tongue of the Ocean, north of Nassau,Bahamas, April 21, 1907. Figure 11, one of the marginalsensory-clubs; figure 11, one of the tentacles; figure 11,optical section near the middle of the length of one of the ten-tacles showing the abaxial ridge of nettling cells which extendsalong the outer side of the tentacle. (See page 452.) Figure 11 drawn by
Medusae of the world . ) Sensory-club of the medusa-bud shown infigure 8. Fig. 10. Geryonia proboscidalis, with contracted manubrium. Drawingtwice the natural size. Nassau Harbor, Bahamas, April, 1907.(See page 425.) Figs. 11 to 11. JEgina rhodina. Tongue of the Ocean, north of Nassau,Bahamas, April 21, 1907. Figure 11, one of the marginalsensory-clubs; figure 11, one of the tentacles; figure 11,optical section near the middle of the length of one of the ten-tacles showing the abaxial ridge of nettling cells which extendsalong the outer side of the tentacle. (See page 452.) Figure 11 drawn by Mr. Carl Kellner; other figures drawn from life, by the author. .»)»;. NARCOMEDUS/E—SOLMUNDELLA. 457 I am inclined to consider this as identical with the somewhat larger S. bitentaculata, or atmost only an ill-defined variety of the latter. S. mediterranea, however, becomes mature when the bell is only 3 to 6 mm. wide, whereas,according to Maas (1905, p. 75), S. bitentaculata shows no trace of gonads even when 8 The largest S. mediterranea are not more than 6 mm. wide, whereas S. bitentaculatabecomes 12 to 15 mm. wide. Moreover, according to Maas, 1893, 1905, the apex of the bellin S. bitentaculata is sharp-edged and keel-like, being laterally flattened and elongated in theaxis of the 2 long tentacles. The apex of the bell of S. mediterranea is, on the other hand,simply dome-like and rounded. According to Maas, 1893, 1905, the outline of the bell-marginof S. bitentaculata is elliptical and elongated in the tentacular axis, whereas the outline of themargin of S. mediterranea is circular. In S. bitentaculata the intertentacular peronial strands
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
