If we turn the aboral side of the animal towards us we 

 find often a brownish band produced by the green cells encir- 

 cling the disk at the periphery of the concavity. This shades 

 off on both sides. Deeper in the jelly beneath this there is 

 a much wider white circle, and from this there are white bands 

 extending outward along the marginal ridges of the jelly, one 

 nearly to the tip of each marginal lobe. The bands to the 

 rhopalial lobes are interrupted, however, by a roughly circu- 

 lar, transparent area over each rhopaliurn ; and in young spe- 

 cimens the other bands are not fused with the circle. On the 

 inner side of this circle there are, deep in the jelly, a num- 

 ber of white areas tapering towards the centre. Each one is 

 in the radius of a rhopaliurn, tind extends to a point about 

 half way from the periphery of the concavity to the edge of the 

 stomach. These areas, like the marginal spots, are not always 

 continuous with the circle. At the centre of the umbrella 

 the stomach ana subgenital cavities may be seen throigh ohe 

 jelly as a reddish bro^m circular area with a diameter of a- 

 bout one-seventh of the total diameter of the disk, while sur- 

 rounding the stomach there is a deep blue halo with points that 

 extend outward between the last mentioned bands of white. 



If now the animal be allowed to return to its usual posi- 

 tion, the subumbrellar surface will be found to be pretty even- 



- 10 - 



