GERYONOPSIS DELICATULA. 39 
length below the opening. Down it run the gastric vessels to the most constricted point, 
where they join a short campanulate stomach set on as if obliquely, and opening by four 
ample, triangular, beautiful crimped lips. The breadth of the umbrella was two inches. I 
saw no ocelli, though very possibly they are present. I placed one of these animals in a 
tumbler of sea-water with some specimens of Cydippe equally alive and active. Before long 
the Medusa seized one of them with its lips, and made such vigorous exertions to swallow the 
ciliograde, that I had great difficulty in rescuing its victim. 
The peculiar form of the reproductive glands, which, indeed, are difficult to detect, 
prevent us placing this animal in Geryonia, to which genus it has close affinity, or in Dianea 
(regarding Dianea probosciadalis as the type of the latter). The genus Zima of Eschscholtz 
seems to be its proper place. [Discus facie infera in conum productus. Ventriculus 
plicatus in apice coni situs. Canali quaterni cum circulo marginali conjuncti.  Cirrhi 
marginales numerosi.”| The figure given by that author of his Zima flavilabris, from the 
neighbourhood of the Azores, bears considerable resemblance to that of the species before us, 
but the number of tentacula (80) is much greater. 
Plate V, f. 1, Zima Bairdii during contraction: 1, a, during expansion; 1, b, as seen 
from above. 
Genus X. Gerryonopsis, Forbes. 
Umbrella hemispherical ; ovaries four, clavate, conspicuous on the sub-umbrella 
in the course of the four simple radiating vessels ; margin of umbrella with numerous 
short tentacula ; stomach at the extremity of a short peduncle, terminating in four 
large fimbriated lips. 
Geryonopsis delicatula, Forbes. 
Plate IX, Fig. 1 (under the name of Zhaumantias cymbaloides). 
Anxious to retain, if possible, the names of recorded species in our British lists, I 
referred to the Medusa cymbaloides of the older acalephologists, a very graceful and tender 
jelly-fish, which is not uncommon on the south coast of England. With much reluctance I 
abandon the reference, for though the character of the stomach, ‘‘ voluminous and much 
exceeding the border,” mentioned by Peron, applies only to the animal before us among all 
the immediate allies of 7awmantias, one of which, the Medusa cymbaloides of Slabber, must 
be in the British seas, the other character of “ tentaculis sedecim, basi bulbosis,” adopted in 
all diagnoses of that species, cannot by any stretch be made to apply, and is too positive to 
be founded on imperfect observation, since the bulbs of the tentacula are distinctly stated to 
be brilliantly ocellated. I trust further research will, before long, make better known to us 
the original species of Slabber and Modeer.* 
The umbrella of my Medusa is hemispheric and rather depressed, smooth, transparent, 
colourless, and of a singularly delicate texture. The margin is encircled by a row of very 
* Plate IX was unfortunately altered and printed off before the name could be corrected, 
