232 
POPULAK SCIENCE KEVIEW. 
parent urn hides no secrets, and we can watch the develop- 
ment and exodus of the contained zooids without difficulty. 
The study, we venture to think, will yield more pleasure than 
many sea-side pursuits. And Ohelia geniculata is also a phos- 
phorescent species, and at night we may witness the sudden illu- 
mination of the colony if we agitate the water in which it is kept. 
Another phosphorescent zoophyte is equally accessible ; for 
on almost every coast on which there is rock and weed, the 
common Sertularia jpumila may .be obtained, overspreading 
with its dense thickets the larger Algae, and this will also yield 
a display of “ living stars.” 
But we cannot multiply illustrations. The shore to which so 
many hasten at this season will supply them without stint. 
Fig. 1. 
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3. 
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4. 
77 
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Fio. 1. 
77 
77 
77 
77 
2 . 
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DESCniPTION OF PLATES. 
Plate XLY. 
Portion of a shoot of GoxoTnTK.EA LoviiNi, highly magnified, 
.r. The coenosarc, or common flesh, y. The horny cuticle, or 
polypary. z z. Calycles. e e. Reproductive buds (gonophores) 
that have passed beyond the orifice of the capsule, and 
continue attached externally, e' e'. Planulae, or ciliated em- 
bryos. 
A single gonophore, more highly magnified j showing the ova 
wdth germinal vesicle and spot. 
From drawings by Professor Wyville Thomson, F.R.S. 
Campanularia neglecta, highly magnified, a. The point 
w'here the coenosarc communicates with the stomach of the 
polypite. 
Lafoea pygju.ea, highly magnified. 
From drawings by the late Mr. Alder. 
A young Campanularian soon after the attachment of the 
embryo. 
The medusiform sexual zooid (gonozooid) of Clytia Johnstoni. 
a. The digestive sac. h b. The umbrella, or swimming-bell. 
c. One of the radiating canals, d. The circular vessel, e. One 
of the lithocysts (organs of sense). 
From drawings by the Author. 
Plate XLVI. 
Dipiiasia pixxata (female), natural size. Im Portion of a 
pinna, magnified, bearing a male capsule, lb. Litto, with 
female capsules. 
DipriASiA PINASTER (female), natural size. 
Dipiiasia fallax, natural size. 
Plemulauia frutescens, natural size. 
Capsule of Dipiiasia rosacea, showing the fixed reproductive 
buds (o o), with ova. 
All the figures but the last are by Mr. Tuffen West. 
