OF MEDUSA MADE BY WILLIAM KEITH BROOKS. 13 



Genus EUTIMA McCrady, 1857. 

 Eutima mira McCrady. 



Eutima mira, MCCRADY, 1857, Gymn. Charleston Harbor, p. 88, plate n, figs. 8, 9. AGASSIZ, L., 1862, Cont. Nat. Hist. 

 U. S., vol. 4, p. 363. AGASSIZ, A., 1865, North Amer. Acaleplue, p. 116. HAECKEL, 1879, Syst. der Medusen, p. 191. 

 BROOKS, 1884, Zool. Anzeigcr, Jahrg. 7, p. 709; 1886, Mem. Boston Soc. Nat. Hist., vol. 3, p. 395, plates 38, 39 

 (hydroid). NUTTING, 1901, Bull. U. S. Fish Commission, vol. 19, p. 378, fig. 93. 



Eutima limpida, AGASSIZ, A., 1865, North American Acal., p. 116, figs. 173, 178. 



Eutima etnarginata (young medusa), BROOKS, 1882, Studies Johns Hopkins Biol. Lab., vol. 2, p. 141. 



Eutima miraE. limpida, HARGITT, 1908, Biol. Bulletin, vol. 14, p. ill. 



Eutima gracilis (young medusa), FEWKF.S, 1881, Bull. Museum Comp. Zool. at Harvard College, vol. 8, p. 158, plate 5, figs. 1-4. 



Bell about 1.5 times as broad as high, about 15 to 30 mm. in diameter. There are 4 

 radially situated tentacles, each about 3 times as long as bell-diameter; also about 100 small, 

 rudimentary nodules upon the bell-margin, some of which give rise to cirri. There are usually 

 no lateral cirri flanking the tentacles when adult, but these commonly occur in the young 

 medusa. There are 8 lithocysts, 2 in each quadrant. Each lithocyst contains 4 to 8 spherical, 

 highly refractive concretions. Velum quite well developed. There are 4 straight, slender radial- 



Fir.. 161. Larva of Euti 



ma mira 



, after Brooks, in Mem. Boston Soc. Nat. Hist., vol. 3. 



canals and a narrow circular vessel. The peduncle is about 3 times as long as height of bell, 

 long, conical, and tapering gradually throughout its length from inner apex of bell-cavity to 

 stomach. Stomach small and flask-shaped, its proximal part, near point of union with 

 peduncle, thrown into complex folds. There are 4 simple, slightly recurved lips. The gonads 

 are situated upon the radial tubes, in two separate regions, one upon the peduncle, and one 

 upon the subumbrella. 



The stomach, gonads, and tentacles, opaque blue-white in color. Many specimens display 

 green entodermal pigment in the stomach and in the basal bulbs of the 4 long tentacles. 



The medusa is common at the Tortugas, Florida; Charleston, South Carolina; and 

 Beaufort, North Carolina. It is an occasional visitant to Newport, Rhode Island, and to 



