278 BULLETIN OF THE 



There is this marked difference between Aglaura and Trachynema. In Aglaura 

 the sexual glands hang from the distal end of the peduncle which bears the 

 stomach, while in Trachynema they are suspended from the upper part of 

 the bell cavity. 



The bell of Aglaura is high, cup-shaped, and without apical projection. The 

 walls are thin, rigid and transparent. There are eight simple, narrow, chymif- 

 erous tubes. The velum is very muscular, and it is mainly by its efforts that 

 the medusa is propelled through the water. 



The proboscis is pedunculated, and bears the eight sausage-like ovaries near 

 its point of division into peduncle and stomach. The upper part of the stomach 

 is spherical in shape, and through its walls the half-digested food can be easily 

 seen. Its mouth is formed by labial walls, in which are imbedded lasso-cells. 

 Many patches of red pigment are present in the lips and the walls of the 

 stomach. 



The tentacles are very numerous, long, and flexible, and are generally broken 

 off near their bases, leaving stiff projecting stumps, as in Trachynema digitale 

 A. Ag. Several specimens were captured which carried the flexible tentacles 

 unbroken, but for the most part these bodies presented the appearance shown 

 in the figure. 



There are eight otocysts, alternating in position with the chymiferous tubes. 

 Each otocyst contains a single otolith. The ovaries are cream-colored. The 

 development of the egg is unknown. 



A. vitrea resembles very closely the A. hcmistoma, Peron et Lesueur, found 

 so commonly in the Atlantic Ocean and Mediterranean Sea. It has, however, 

 no apical projection to the bell, and the umbrella is half-egg-shaped. The form 

 of the bell is so variable that it may eventually be found to be identical with 

 the well-known A. hcmistoma. 



Glossocodon tenuirostris (sp. Agassiz). 



Plate VII. Figs. 1 - 9. 



In 1857 McCrady* gave a description of a new species of Liriope, to which 

 he affixed the name Liriope scutigera. L. Agassiz f in 1862 mentions from 

 Key West, Florida, another species, L. tenuirostris, which he says has a more 

 slender proboscis than L. scutigera. A. Agassiz J gives a figure of a Liriope, 

 which he identifies with L. scutigera, and mentions the form L. tmtrirostrit, 

 from Florida, without description. The figure of L. scutigera by A. AgMBU has 

 slighter ovaries than those mentioned in MeCrady's description, and has not 

 the intcrradial tentacles ("four short" tentacles) spoken of by the lasl author. 

 The figure, however, was but a sketch, and the medusa from which it was made 

 is probably correctly referred to L. Kutigera, ftfcCr. Eaeckel takes excep- 



* Oymnophtbalmata of Charleston Harbor. Proc I'll. Soc. Nat Hist., 1857. 

 t Contributions to the Natural History of the United states, IV. 

 J Op. cit., p. 60. 



