LEPTOMEDUS/E EUTIMA. 



297 



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. 



Fig. 160. — Eutima mira, after Brooks, in Mem. Boston Soc. Nat. Hist., 1886. Small figures are of natural size 



and illustrate attitudes of the medusa. 



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 

 Woods Hole, Massachusetts, late in summer, being abundant in some years and rare in 

 others. I am in accord with Hargitt in believing that E. mira is identical with E. limpida. 



The development of Eutima mira has been studied by Brooks, 1884 and 1886, who 

 reared the hydroid from the egg. The gastrula is formed by delamination of the entoderm 

 from the inner ends of the ectoderm cells. This takes place most rapidly at the narrow end 



