162 BULLETIN OF THE 



like structure" extended from the rim of the bell inwards at right angles to 

 the vertical axis. The mouth is a simple circular opening in the centre of the 

 washer last mentioned. The upper walls of the stomach are formed by the 

 concavity in the lower surface of the umbrella. The stomach cavity appears 

 full of granular particles, which are probably globules of chymiferous fluid. 

 Sexu;d organs had not begun to develop. Development of egg unknown. The 

 jeUy-fish studied is probably an immature one, as the size and absence of 

 sexual glands indicates. Whether it is identical with the Mediterranean species, 

 which reaches a much larger size, is yet to be made out. It is not a frequent 

 visitor in Narragansett Bay, and is undoubtedly brought there by the wanner 

 waters of the Gulf Stream. Its anatomy shows that it is very different from 

 Prof. McCrady's Cunina octoiiaria. 



This description was made up from figures by Mr. Agassiz and a few rough 

 sketches made by the author. 



Liriope scutigera, McCrajot.* 



Plate VI. Figs. 7, 10, 11. 



A single specimen of L. scutigera, McCr. was found at Newport in the sum- 

 mer of 1878. 



Its bell is hemispherical, verj' transparent, with thick walls and smooth ex- 

 ternal surface. Radial tubes thread-like, unbranched, and four in number. 

 Proboscis elongated, slender, with a long peduncle, which extends very far out- 

 side the bell opening. This peduncle is highly flexible. The lips of the mouth 

 are simple, not elongated into oral tentacles, and cruciform when seen from be- 

 low (Plate VI. fig. 10). Upon the lips are placed many lasso cells. The color 

 of the lips is purple. A short gastrostyle hangs down as a continuation of the 

 peduncle inside the stomach. No commensalists attached to it. 



The tentacles are long, hollow, very flexible, and four in number. Lasso- 

 cells are arranged in rings, alternating with smooth surfaces along each tentacle 

 to ita very tip. 



Otocysts four, each one containing a single endodermic otolith. Each otocyst 

 is sessile on the margin of the bell, and is accompanied by a clul)-sliaped 

 structure mounted on a short peduncle (Plate VI. fig. 11). The ovaries are 

 situated on the radial tubes. They are heart-shaped, and so inflated with ova 

 that their edges closely approach, where their width is the greatest. 



The development of the egg is unkno^vn. 



* McCrady ha.s published a partial description of this jelly-fish in his "Gymnoph- 

 thalmati of rharleston Harlx^r," p. 106. A figure of the same is given in the North 

 AnrifTiean Acalephre, p. 60. The author of the latter does not represent the heart- 

 hhaped ovaries, hut in his description says of them that tliey are more heart-shaped 

 than McCrady desciilics. L. scutujcra, McCrady, and L. CatJierinensis, Fritz Miiller, 

 may be the same medusa. 



