302 MEDUS.B OF THE WORLD. 



tentacles. There are 8 lithocysts, each one of which contains 3 to 5 concretions. Velum large. 

 The 4 radial-canals are straight and narrow, and the gonads are found upon them near to the 

 circular vessel. Peduncle is slender and 1.5 as long as diameter of bell. Stomach flask- 

 shaped, 4 flanged lips. The genital organs, tentacles, and stomach slightly opaque and 

 bluish in color. Several specimens, Suva Harbor, Fiji Islands, January, 1898. Bigelow found 

 it in Acapulco Harbor, Pacific coast of Mexico. 



Eutima levuka var. occellata, Maas. 



Eulima levuka var. occellata, Maas, 1905, Craspedoten Medusen der Siboga Exped., Monog. !o, p. 35, taf. 7, fign. 43, 44. 



This variety is distinguished from E. levuka from the Fiji Islands by having black- 

 pigmented, rudimentary tentacle-bulbs on the margin, while in E. levuka from Fiji the rudi- 

 mentary tentacle-bulbs are colorless. The bell in large specimens of E. levuka var. occellata, 

 is 12 to 15 mm. wide, flatter than a hemisphere, with fairly thin walls. There are typically 8 

 long, hollow tentacles, 4 radial, 4 interradial. These are about as long as the bell-diameter 

 and have flattened, elongate basal bulbs. 16 to 20 small rudimentary tentacle-bulbs on the 

 margin in each quadrant, more or less pigmented with black, each flanked by a pair of short 

 cirri. There are 8 lithocysts, 2 in each quadrant. 



The peduncle is narrow, 4-sided, and pyramidal above. It is about 1.5 times as long as 

 bell-diameter. Stomach small, urn-shaped, 4-sided, with 4 slightly folded lips. The 4 radial- 

 canals extend from the ring-canal down the 4 angular corners of the peduncle to the stomach. 



In young specimens we find gonads only on the subumbrella parts of the 4 radial-canals, 

 but in large medusae they are found not only on the distal part of each radial-canal over the 

 subumbrella but also throughout almost the entire length of the prismatic part of the peduncle. 

 The gonads upon the subumbrella are spindle-shaped, with their pointed ends near inner apex 

 of bell-cavity, their blunt ends near the ring-canal. 



Maas gives a good description and clear figures of this form. It was found in considerable 

 numbers by the Siboga Expedition upon the surface of the sea among the Malay Islands, 

 Ternate, Salomakie, Lucipara, etc. Bigelow finds that it intergrades with E. levuka and is 

 not a well-defined variety. 



Eutima gentiana Haeckel. 

 Eutimeta, Eutima, Geryonopsis gentiana, Haeckel, 1879, s y st - der Medusen, p. 194, taf. 12, fign. 6-9. 



Bell half-egg-shaped, with fairly thin walls, 8 mm. wide, 10 mm. high. 8 long tentacles 

 with conical bases, flanked by cirri. 64 marginal cirri. 8 lithocysts end with 3 to 4 concretions. 

 Stomach elongate, urn-shaped, about as long as the bell-radius, and mounted upon a peduncle 

 which is narrow, uniform, 4-sided, prismatic, and about as long as the bell-diameter. 4 

 gonads on the 4 radial-canals of the peduncle above the stomach. The gonads and tentacles 

 are whitish. Found by Haeckel at the Canary Islands. Hydroid unknown. When young 

 the medusa has 4 radially placed tentacles, 8 lithocysts, no cirri, and no peduncle. Then 

 the peduncle develops, interradial tentacles grow out, and cirri make their appearance. 



Eutima campanulata. 



Liriopsis campanulata, Claus, 1876, Verhandl. Zool. Bot. Gesell. Wien, Bd. 26, p. II. 



Octorchidium tetranema (young medusa without cirri), Haeckel, 1879, Syst. der Medusen, p. 196, taf. 13, fig. 9. 



Octorchis gegenbauri+O. campanulatus, Haeckel, 1879, Syst- der Medusen, p. 197, taf. 13, figs. 2, 10-16; Ibid., p. 198, taf. 13, 



fign. 3-8, Octorchandra germanica; Ibid., plate 13, fig. I, Octorchandra canadensis. 

 Octorchis gegenbauri, Claus, 1881, Arbeit. Zool. Inst. Wien, Bd. 4, p. 89, taf. I, fign. 1-10; taf. 2, fign. 10-20 (hydroid [Campan- 



opsis] and medusa).— Graeffe, 1884, Arbeit. Zool. Inst. Wien, Bd. 5, p. 358.— Metschnikoff, E., 1886, Embryol. 



Studien an Medusen, Wien, p. 23 (egg), p. 42 (segmentation), p. 52 (formation of entoderm), p. 79 (polypite), taf. 3, fign. 



10-19. — Browne, 1896, Proc Zool. Soc London, p. 494; 1905, Proc. Royal Soc Edinburgh, vol. 25, p. 771. 

 ( ?) Octorchis gegenbauri, Browne, 1905, Pearl Oyster Fisheries, Gulf of Manaar, p. 140 (medusa from Gulf of Manaar, Ceylon). 



Haeckel, 1897, appears to me to have made 5 species and 3 genera from this medusa as 

 follows : 



Octorchidium tetranema, bell 3 mm. wide, 4 tentacles, no cirri. 



Octorchis gegenbauri, 0. campanulata, 8 or 9 mm. wide, 8 tentacles, 40 to 300 cirri. 



Octorchandra germanica, 15 mm. wide, 12 to 16 tentacles, 30 to 50 cirri. 



Octorchandra canadensis, 25 to 30 mm. wide, 16 to 32 tentacles, 200 to 300 cirri. 



