716 MEDUSA OF THE WORLD. 



Cannostomites multicirrata Maas. 

 Cannostomites muliicirrata, MAAS, 1902, Palaontographica, vol. 48, p. 303, taf. 23, fig. i, text-fig. 



This is a fossil from the Jurassic lithographic slates of Bavaria. A single specimen was 

 studied by Maas. It may possibly be allied to Atolla. Only the subumbrella is known. Bell 

 about 100 mm. wide. An open, central mouth with 4 perradial, gelatinous columns. Sub- 

 umbrella simple with 4 interradial sickle-shaped, notched, and swollen gonads. Marginal 

 ring-muscle entire and powerfully developed as in Atolla. Numerous marginal lappets of 

 varying sizes arranged in multiples of 4. Short, simple tapering tentacles arise from notches 

 between the lappets. 



Atollites minor and Atollites zitteli Maas. 

 Atollitti minor and A. ziltili, MAAS, 1902, Palaontographica, Bd. 48, p. 319, taf. 23, fign. 5 und 6. 



These fossils are from the lower chalk of Carpathia from the Warnsdort strata. There 

 are more than 10 marginal lappets in high relief, quite variable in size and number. A small, 

 plain center of the exumbrella and an intermediate zone with raised streaks radiating out- 

 wardly. The medusas may be allied to Atolla. They are well figured by Maas. 



Acraspedites antiquus Haeckel. 



Mfdusiles antiquus, HAECKEL, 1865, Zeit. fur wissen. Zool., Bd. 15, p. 509, taf. 39, fig. 2. 



Acraspedites antiquus, HAECKEL, 1869, Zeit. fur wissen. Zool., Bd. 19, p. 559; 1880, Syst.der Mcdusen, p. 647. VON AMMON, 1886, 



Abhandl. Math.-phys. Classe Konigl. bayer. Akad. Wissen., Bd. 15, p. 157. WALCOTT, 1898, Monographs U.S. Geol. 



Surv., vol. 30, p. 75, plate 44, fig. z. 



This is the vague impression of a medusa in the Jurassic white coral limestone, litho- 

 graphic slate of Eichstadt, Bavaria. It is about 140 mm. in diameter and appears to have 8 

 marginal lobes. The sculpturing of the bell may place it among the Coronatae, but Haeckel 

 is inclined to classify it with the Pelagidae. 



Semaeostomites zitteli Haeckel. 



Semaeostomites zitteli , HAECKEL, 1874, Jena. Zeitsch. fur Naturw., Bd. 8, p. 323, taf. n; 1880, Syst. der Medusen, p. 647. VON 

 AMMON, 1886, Abhandlung Math.-phys. Classe Konigl. bayerischen Akad. Wissen., Bd. 15, p. 157. WALCOTT, 1898, 

 Monographs U. S. Geol. Surv., vol. 30, p. 70, pi. 39, text-fig. 17. 



This semaeostomous medusa is found fossil in the Jurassic lithographic slate of Solenhofen, 

 Bavaria. According to Haeckel the disk is 80 mm. wide, mouth with 4 lips each about 80 mm. 

 long and 10 mm. wide. Central stomach cruciform. 4 interradial, elliptical, genital pouches 

 each 8 to 10 mm. wide. 16 unbranched ( ? ) radial-canals, 4 perradial, 4 interradial, and 8 

 adradial. A ring-canal at some distance inward from the margin. 120 to 128 marginal lappets, 

 and an equal number of tentacles each about 30 mm. long. This medusa is apparently one 

 of the Ulmaridae allied to Discomedusa. 



Eulithota fasciculata Haeckel. 



Eulithola jasciculata, HAECKEL, 1869, Zeit. fur wissen. Zool., Bd. 19, p. 549, taf. 42, fign. 1,2; 1880, Syst. der Medusen, p. 647. 

 VON AMMON, 1886, Abhandl. Math.-phys. Classe Konigl. bayer. Akad. Wissen., Bd. 15, p. 157. WALCOTT, 1898, Mono- 

 graphs U. S. Geol. Surv., vol. 30, p. 73, plate 45, figs. 3, 4. 



This is a fossil medusa from the Jurassic lithographic slate of Solenhofen, Bavaria. 



16 marginal lappets. 8 clusters, each composed of at least 4 tentacles, which arise from 

 8 perradial and interradial ( ? ) thickened pads between the lappets. These pads may represent 

 the 8 rhopalia. 16 crescentic gonads around the stomach-margin. 16 interlobular radial- 

 canals. 4 (?) simple, short lips. The affinities of this medusa are uncertain but its nearest 

 living ally appears to be Sthenonia or Poralia. 



Myogramma speciosum Maas. 



Myogramma speciosum, MAAS, 1902, Palaontographica, Bd. 48, p. 298, tafn. 22, 23. VON AMMON, 1908, Geonostischen Jahres- 

 heften, Jahrg. 19, p. 174, fign. 2, 3. 



This fossil is from the lithographic slate of Solenhofen. Discomedusas with flatly rounded 

 bell. 4-rayed in the organization of the central stomach. 8-rayed at the bell-margin. In the 



