On the Ephyre of Cotylorhiza and Rhizostoma. 175 
Name of fish. Region of body. Name of parasite. 
Anthocephalus giganteus, Dies. 
1. Caranx, sp. ...... Abdomen. hippoglossi vulgaris, 
( Bellgh. 
De MAD ete Av <4 (Esophagus. —— yiganteus, Dies. 
3. Arius thalassinus .. do. —— elongatus, Rud. 
4, Equula caballa .... do. Pterobothrium macrourum, 
Dies. 
5. Cybium guttatum .. do. —— heteracanthum, Dies. 
6. Synagris luteus .... do. erassicolle, Dies. 
7. Trichiurus savala .. do. —— crassicolle, Dies. 
IDES so nics un Abdomen. Anthocephalus, n. sp. 
9. Stromateus niger .. (Esophagus. Pterobothrium heteracanthum, 
Dies. 
10. Sctena, sp... 10... do. , 0. sp. 
11 SDE ayn aatins Intestine. —— crassicolle, Dies. 
12. Drepane punctata.. Cisophagus. ©—— heteracanthum, Dies. 
XXII.— The Ephyre of Cotylorhiza and Rhizostoma, and their 
Development into Hight-armed Meduse. By C. Ciaus *. 
Durine several decades various naturalists have already 
endeavoured to trace the development of the Mediterranean 
Cotylorhiza tuberculata (Cephea Wagner, Cassiopea borbonica) 
from the egg to the Ephyra, but unfortunately with only im- 
perfect results. Most of them} did not even get beyond the 
eight-armed Scyphostoma-stage. Gegenbaur}{ alone suc- 
ceeded in rearing the sixteen-armed Scyphostoma-stage, 
without, however, being able to bring it to strobilation and the 
throwing off of Ephyre. So much, however, could be deduced 
with certainty from these observations, that Cotylorhiza does 
not undergo a direct development after the fashion of Pelagia, 
but passes through a Strobila-stage, the peculiarities of which 
were still to be ascertained. For although the known Strobile 
of Aurelia, Cyanea, and Chrysaora so closely repeat the same 
form that, without careful investigation of the tissues, we can 
hardly distinguish them, it is & prior? by no means demon- 
* Translated by W.S. Dallas, F.L.S., from the ‘ Arbeiten aus dem 
zoologischen Institute der Universitat Wien,’ &c., Bd. v. Heft ii. 
+ See Ecker, “ Ueber die Entwicklung einer Schreibenqualle ( Cephea 
Wagneri),” in ‘ Bericht iiber die Verhandlungen der naturf. Gesellsch. in 
Basel,’ Bd. viii. 1849; W. Busch, ‘ Beobachtungen iiber Anatomie und 
Entwicklung einiger wirbellosen Thiere,’ Berlin, 1851; A. von Frantzius, 
“Ueber die Jungen der Cephea,” in Zeitschy. fiir wiss. Zool. Bd. iv. 1853. 
C. Gegenbaur, *‘ Zur Lehre des Generationswechsels und der Fort- 
pflanzung der Medusen und Polypen,’ Wiirzburg, 1854. 
