j5 medusje. I. 



ground-plane, and though the peculiar structure of the gonads of Cliromatonema places that genus in 

 opposition to the other members of the family Laodiceidcr^ this structure does not contradict the 

 supposition of a generic relationship. 



The parallel between the structure of the gonads of Chroniatonevia and of the TiaridcF men- 

 tioned above is hardly a casual one. There is, in fact, a striking resemblance between the gonads of 

 Cliroviatonoua and the eight adradial rows of gonadial sacks, communicating with the bell-cavity 

 through transversal fissures in the outer surface of the manubrium in a Calycopsis (see the figure of 

 Bigelow, copied by Hartlaub, 1913, P- 347, and the transversal section, Vanhoffen, 1911, Textfig. 

 loa, p. 216, copied by Hartlaub, 1913, p. 348. Compare also Hartlaub's Fig. 238, (1913, p. 287) of 

 the gonads of a young Le^ickartiara octoua^ seen from the inner side of the manubrium). The impor- 

 tance of the resemblances between the gonads of the Tiaridcr and the gonads of Chrornatonema and 

 the other Laodiceid(r is mentioned above in the introduction to the family Laodiceidce (pp. 6 — 7). The 

 marginal aj^pendages of Chromaioncma and their relations to the corresponding organs of the other 

 Laodiccidcr and the Tiaridce were also mentioned above. 



Thus my considerations with regard to the systematical position of Clirouiatoiicnia lead to the 

 result, that it belongs to the family Laodiccidcr, among which it takes a low position, presenting several 

 features pointing to the connection with the Tiaridcr. Its position among the Laodiccidcr is, however, 

 not onh' a low, but also in certain regards a singular position, particularly owing to the peculiar 

 structure of the gonads, and it seems probable that the genus has arisen from some other group of 

 Tiaridcr than the predecessors of the other members of the Laodiccidcr. 



Genus Laodicea Lesson. 



Laodlcea undulata (Forbes & Goodsir). 



Plate II, figs, I— S. 



1 Medusa cruciata Forskal 1775. Descriptiones Animalium, p. no. — 1776. Icones rerum naturalium. 



Tab. 5, Fig. A. 

 TiiauDHDitias iiitdiilata Forbes and Goodsir 1851. — Transact. Royal Soc. Edinb. Vol. XX, p. 313. 



folate 10, fig. 7. 

 — tnediterranca Gegenbauer 1856. — Zeitschr. wiss. Zool. Bd. VIII, p. 237. Taf. 8, Fig. 1—3. 



Laodicea calcarata A. Agassiz, in L. Agassiz 1862. Contrib. Nat. Hist. U. S. Vol. 4, p. 350. 

 Laodice ulothrix Haeckel 1879. System d. Medusen, p. 133. Taf. 8, Fig. 5 — 7. 

 Laodicea maraiiia A. Agassiz and Mayer 1899. Acalephs, Fiji Islands. — PjuII. Mus. Comp. Zool. Vol. 



XXXII, p. 162. Plate 3, figs. 7—8. 

 Laodice indica Browne 1905 b. — Pearl Oyster Fisheries, vSuppl. Rep. 27, p. 136. Plate I, fig. 5 ; Plate IV, 

 figs. 7— II. 



— — Browne 1907. Revision of the . . . Laodiceidae. — Ann. Mag. Nat. Hist. Ser. 7, Vol. XX, 



p. 460. 

 Laodicea cruciata Mayer 1910. Medusa; of the World, p. 201. Textfigs. 104—105. Plate 21, figs. 4 and 5; 

 Plate 22, fig.s. 2 — 6; Plate 23, figs, i — 3. 



— Bigelowi Neppi et Stiasny 191 1. Zool. Anz. Bd. 38, p. 396. 



