124 CLASS III. 
This family nearly coincides with the genus Cyanea Cuv. The 
four openings beneath the disc, conducting to the cavities which 
contain the organs for propagation, were by Piron and Lamarck 
incorrectly considered to be four mouths. 
Cyanea Cuy. (and species of the genus Pelagia ejusd.) 
Genera: Sthenonia Escuscu., Phacellophora Br, Cyanea 
Escuscu., Aurelia Piron; Pelagia Prron, Chrysaora PxERON, 
Ephyra Escuscu. (Huryale and Ephyra Peron.) 
Sp. Cyanwa aurita, Medusa aurita L.; MuntuEr Zoolog. danic. Tab. 76, 77; 
ExRENB. Abhandl. der Akad. zw Berlin, physik. Klasse 1835; Cuv. R. 
Anim. édit. ill., Zooph. The four arms are considerably longer in old than 
in younger specimens ; these arms consist of two laminz crumpled at the 
edges, which during life face each other in such a way as to form a canal ; 
after death they are flaccid and parted asunder. The disc is not quite 
circular, but in some degree divided by indentations of the margin into 
eight lobes. The four arms unite at the center of the body.to form a 
circular aperture: this mouth leads to the stomach, which has four lateral 
cavities. From the stomach there run sixteen vessels to the margin of the 
dise, of which eight, divided into branches, alternate with eight others un- 
divided and open at the margin. In addition, there are eight corpuscles at 
the margin, which EHRENBERG considers to be eyes, and which were noticed 
above. This species is found in the North Sea and the Baltic. Comp. 
H. M. Ganpr Beitrige zur Anatomie und Physiologie der Medusen, mit 
2 Kupfertafeln, Berlin, 1816, 8vo; Barr Veber Medusa aurita, MECKEL’S 
Archiv fiir die Physiol. V1. 1823, 8. 369—391, with fig.; F. RosmnrTHan 
Beitrag zur Anatomie der Quallen, Zeitschrift fiir Physiol., herausgegeben 
von F, TIEDEMANN, G. R. und L. C. TREVIRANUS, I. 2, 1825, s. 318—330, 
with fig. 
Cyanea capillata, Medusa capillata, BastER Natuurk. Uttsp. 11., Tab. v. 
fig. I. 
Pelagia noctiluca EscuscH., Medusa noctiluca FoRSK., WAGNER Baw der 
Pelag. noctiluca and Icon. Zool, Tab. XXXII. ; in the Mediterranean, &c. 
Ephyra Escuscu., probably rests on young forms of Cyanewa; comp. 
Witt Hor. Tergest. Tab. 11. fig. 20, and SARS in ERICHSON’S Archiv, 1841, 
Tab, I. 
Family IX. Oceanide. Disc without lateral cavities to in- 
close generative organs. Body campanulate. Mouth and ceso- 
phagus often elongated into a proboscis. Arms conspicuous or 
lobes around the mouth. Canals proceeding from the stomach 
elongate. 
