THE FORBESIAN .EQUOREA. 343 



marginal canal, much magnified, with two tentacle- 

 bulbs and two ocelli. 



The white lines that run down into the filaments 

 produced from the edge of the peduncle are composed 

 of oblong polyhedral cells set transversely. The web 

 which borders them and fills the interspaces is com- 

 posed of minute close set granules. 



The radiating bands of the sub -umbrella, that I have 

 compared to ground glass, are vessels, and do run 

 into the marginal canal ; the irregular dilatations are 

 not ovaries, but simple enlargements of the vessels: 

 a fluid circulates in tbem, carrying granules along 

 rather rapidly : the current appears to pass up from 

 the margin towards the centre of the sub-umbrella, 

 near the walls of the canals, while a reverse current 

 occupies the middle part, the granules frequently pas- 

 sing from one into the other current. At the point 

 where the canals enter the circular frosted disk, they 

 have thickened fleshy hps, capable of closing so as to 

 make tubes, or of separating to form grooves. A lon- 

 gitudinal texture of fibres is plainly visible in these 

 grooves. 



THE FORBESIAN tEQUGREA. 



Sept. 1th. — There had been a heavy breeze all 

 night and this morning from the N.E. which had 

 set a good deal of sea in upon the shore. I took 

 down my Medusa-net and jars to the shore at the 

 Tunnel rocks, more for the sake of a walk than with 

 the expectation of obtaining any thing, for the wind 

 and sea were still high. But my first glance at the 

 water revealed many Medusae. 



There is on the shore here a large pool, partly 



