APPENDIX, 385 
(4), with short, finger-shaped branches (vol. ii. p. 159). Behind it, 
below on the left (5), is a very large marine rose (Actinia), a single 
individual from the class of six-rayed corals (Hexacoralla, vol. ii. 
p- 143). Its low, cylindrical body has a crown of very numerous 
and large leaf-shaped tentacles. Below, in the centre of the 
ground (6), isa sea-anemone (Cereanthus) from the group of four- 
fold corals (Tetracoralla). Lastly, on a small hill on the bottom 
of the sea, there rises, on the right above the corals (1) a 
cup-polyp (lucernaria), as the representative of the stalked- 
jellies. (Podactinaria, or Calycozoa, vol. 11. p. 144.) Its cup- 
shaped, stalked body (7) has eight globular clusters of small, 
knotted tentacles on its rim. 
Among the swimming Zoophytes which occupy the upper half 
of Plate VII., the hydromeduse are especially remarkable, on 
account of their alteration of generation. (Compare vol. i. p. 206). 
Directly above the Lucernaria (7) floats a small tiara jelly 
(Oceania), whose bell-shaped body has a process like a dome, 
the form of a papal tiara (8). From the opening of the bell 
there hangs a wreath of very fine and long tentacles. This 
Oceania is the offspring of a tube-polyp, resembling the adhering 
Tubularia below on the left (3). Beside this latter, on the left, 
swims a large but very delicate hair-jelly (AZquorea). Its disc- 
shaped, slightly arched body is just drawing itself together, and 
pressing water out of the cavity of the cup lying below (9). 
The numerous, long, and fine hair-like tentacles which hang down 
from the rim of the cup are drawn by the ejected water into a 
conical bunch, which towards the centre turns upwards like a 
collar, and is thrown into folds. Above, in the middle of the 
cavity of the cup, hangs the stomach, the mouth of which is 
surrounded by four lobes. This Aiquorea is derived from a 
small bell-polyp, resembling the Campanularia (2). The small, 
slightly arched cap-jelly (Eucope), swimming above in the centre 
(10), is likewise derived froma similar bell-polyp. In these three 
last cases (8, 9, 10), as in the majority of the hydromeduse, the 
alternation of generation consists in the freely swimming medusa 
(8, 9, 10), arising by the formation of buds (therefore by non- 
