126 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



ever, differs in many points from those already known, and it is so far 

 the only representative of the genus Haliclystus found on the Pacific 

 coast. 



HALICLYSTUS STEJNEGERI, new species. 



Type.—Eo. 18942, U.S.KM. 



Habitat. — Bering Island, Korth Pacific Ocean. 



The medusa is funnel-shaped and has a rather short peduncle. The 

 largest specimen of the collection is 18 mm. in height (including the pedun- 

 cle) and 18 mm. in diameter. The peduncle is 5^ mm. in height and 2t} mm. 

 in breadth. I shall give a short description of such larger specimens. 



The preserved specimens are grayish or pale brown, semitransparent, 

 with a dark brown or nearly black streak at the umbrella margin and 



f 



Fig. ].— Haliclystus STEJNEGERI, NEW SPECIES. Side view. X 4. 

 Drawn by K. Kishinouye. 



each perradial corner of the peduncle (figs. 1, 2). Besides these there 

 are 16 radial streaks of the same color (fig. 1). Each two of these 16 

 streaks are paired along the adradii, and each two adradial pairs unite 

 together in turn at the perradii at the junction of the umbrella (some- 

 times called the calyx) and the peduncle. These dark streaks are found 

 in the exumbrella. In the subumbrella, too, a dark streak is found at 

 each j)erradial edge of the oesophagus, and moreover there are pigment 

 cells around the genital sacs. In all these cases the pigment is found 

 in endoderm cells. 



The umbrella, or the so-called calyx, is funnel-shaped or conical, 

 gradually increasing in breadth from the peduncle to the umbrella 

 margin. The breadth of the umbrella is one and one-third to one 

 and one-half times as long as its height. 



