BAHAMA MEDUSAE. 27 
Aegina rhodina, IIaeckel. 
F'ujs. 28, 28a, 2D, Plate IV. 
Haeckel, E. 187'J ; Das Syst. der Medueen, p. 338, Taf. XX., Figs. 11-15. 
Bell of mature medusa 40-50 uim. wide. Of llie spccinu'U fijiured l>y us, 
7 mm. Sides of bell sloping; apex rounded. There are four teutaeles each 
about as long as the bell-diameter, their entodernuil cells are disk-like, and a 
single row of nematocysts extends down their outer sides (see Fig. 29). 
These tentacles arise from the sides of the bell half-way between the margin 
and apex. There are twelve sense organs upon the bell-margin, each contain- 
ing two crystalline otoliths (Fig. 28a). The velum is well developed. The 
gastric portion of the manubrium surrounds a conical mass of gelatinous 
substance which projects from the inner apex of the bell cavity and occupies 
the centre of the stomach. The mouth is a simple round opening. There are 
eight genital pouches, two in each quadrant. Their outer edges are quad- 
ratic, and they are separated by a very small space. The genital organs 
and tentacles are delicate pink, while the gastric part of the manubrium is 
intense green. A single immature specimen was found at Mastic Point, 
Andros Island, Bahamas, in a surface tow on June 20, 1903. Haeckel found 
three specimens in the Canary Islands in January, 1867. 
Ilaeckel's description accords with ours, excepting that he finds sixteen 
instead of twelve marginal sense organs; and he states that the stomach is 
pale reddish instead of intense green as observed by us. 
Cunoctantha, sp. 
Figs. 36-42, Plate IV. 
A budding nurs(% or stolon, of Cunoctantha was found floating freely in 
the water at the Tortugas, Florida, in July. Only one end of this stobui was 
perfect, the other extremity being in a state of advanced disintegration so 
that its form was indeterminate. It was, therefore, somewhat renuirkable 
that the budding end of the stolon was apparently in a perfect healthy con- 
dition and survived for a whole day in the a(]uarium, giving rise to medusip 
in considerable numbers. It is possible that the disintegrated end of the 
stolon was being al)Sorbed to provide nutriment for th<' budding v\u\. but 
this is a mere conjecture. 
Figs. 37-41 represent successive stages in the formation of the medusa- 
buds. The bud is at first pyriform, and then its base becomes surrounded by 
a collar destined to form the medusa-bell. The eight tentacles and eight 
