SOMETHING ABOUT JELLY-FISHES. 253 
to be seen minute globular bodies, to be finally set free 
by the rupture of the capsule, as free swimming Jelly- 
fishes. (See Plate 8, fig. 12: a, fixed individai; b, 
capsule containing young Jelly-fishes.) Others bud di- 
rectly from the twig and drop off singly, as in Coryne. 
(Fig. 7, buds forming from Hydroid stalk ; Fig. 6, adult 
Coryne.) These are found by thousands in spring time. 
Not only do these free Jelly-fishes bud from fixed com- 
munities, but in one species young ones bud from the 
Jelly-fish itself, as in Lizzia (Fig. 10), and certain others 
where the young bud from the stomach. All these Hy- 
droid Jelly-fishes produce eggs, which again give rise to 
plant-like communities. At another time we hope to de- 
vote a chapter to the structure of Jelly-fishes, and illus- 
trate more fully the character of the Hydroids, of which 
we have scarcely touched in this paper. 
EXPLANATION OF PLATE 8. 
Fig- 1. Early condition of Aurelia, —after AGASS 
Fig. 2. Older condition of same, showing sioniaab about to 
separate, —after AGASSIZ. 
Fig. b; Da a short time after Bird itself, — original. 
Fig. 4. Advanced stage of above, 
Fig. 5. Aurelia, in adult condition, Pin Kannik 
Fig. 6. Coryne mirabilis Ag., —original 
Fig. 7. Hydroid community of Gie TN Doriy Jelly- 
— origi 
Fig. 11. ompr gam te Pe ‘of Eucope diaphana Ag.,—after A. 
GASSIZ. 
Fig. 12. Showing one twig of Eucope with fixed individual A, and 
reproductive 3 ‘A arogan a number of young 
Jelly-fishes, — after 
Fig. 13. Eucope, in adult jere aA, —original. 
