[13] MEDUS.E FROM THE GULF STREAM. 525 



The collar lobes of these specimens are girt by a horseshoe-shaped 

 festoon canal, as in the Peganthidae, but the bell is more flexible and 

 not crossed by the radial elevations and depressions upon the exum- 

 brella. * 



Umbrella flat, discoid, with a ring of sexual bodies divided into as 

 many lobes as tentacles and alternating with them. In each marginal 

 lobe there is a genital sac, which is free from the wall of the lobes on 

 the floor of the gastral pouches. 



Tentacles numerous, 20 to 22 or more in number, springing from the 

 sides of the body or the peripheral border of the umbrella. Tentacles 

 longer than the diameter of the bell. The marginal collar is composed 

 of as many lobes as there are tentacles, and each has a festoon canal. 

 Peronise wanting. 1 



The following notes were made from a specimen with 22 tentacles: 

 Umbrella flat, lens-shaped or discoidal. Color, transparent, white in 

 alcohol, flabby, gelatinous. Outer surface (exumbrella) smooth. The 

 body divided into a central region and a peripheral collar. 



Central region plano-convex or double convex. The greater convex- 

 ity is below. Diameter in alcohol, 20 mm . 



Upper surface flat. No coronal fossa or annular indentation at the 

 rim near the origin of the tentacles. 



The marginal collar is composed of twenty-two marginal lappets 

 joined laterally by a thin membrane. The festoon canal broad, extend- 

 ing from tentacle to tentacle in well-marked horseshoe shaped-loops. No 

 sense bodies were seen, on account of the poor preservation of the 

 specimen. 



The festoon canal seems to open on each side of the tentacle into the 

 central stomach cavity. The edge of the marginal lappets is girt by a 

 thin velum. The tentacles are long (longer than the diameter of the 

 bell) and are inserted into the gelatinous substance of the bell by a 

 conical root extending radially. No peronia and no marked marginal 

 canal besides the festoon canal. Twenty-two gastral pouches. The 

 stomach is a dish-shaped cavity bounded above by the under surface 

 of the central region of the disk and below by the wall of the stomach. 

 Well-marked gastral pouches. The mouth has a broad opening with- 

 out protruding lips. 



The sexual bodies lie in a ring on the peripheral region of the lower 

 stomach walls in the gastral pouches. In the specimen with twenty- 

 two tentacles these organs were not seen. 



In other and larger specimens in which, however, in one instance at 

 least, there are not as many tentacles, the sexual bodies take the form 

 of sacs hanging in the lower wall of the stomach between the radii of 

 the tentacles. In one case these glands are very much inflated ; in an- 

 other they have the form of a simple band. Of the species of Cunina 



* The species of Cunina, C. discoides, may eventually turn out to be oue of the 

 Atlantic species of Solmaris. It may be the young of S. coronantha, Hseckel. 



