Bibliographical Notices. 
139 
with twigs : likewise with slender, prolonged, plumose vegetations 
sometimes interspersed, whereon, besides hydrae, are borne long 
ampullate axillary vesicles, each containing many planulae (3.) that 
A. ramosa may have three vesicles all different from each other in 
form ; (4.) “ that vigorous reproductive energies reside in the ramosa, 
which are readily and frequently exhibited, while similar energies 
are feeble and rare in the A. indivisa.’' (p. 209.) 
21. Laomedea dichotoma. Admirably described and figured. The 
cell of the polype is deciduous. The larva is medusiform, and has 
some resemblance to a hand-bell. “ It swims by jerks, or bounds 
like the various species of Medusae, from collapse of the body, 
perhaps aided by the tentacular organs. It pursues all directions, 
rising, falling, or remaining stationary in equilibrio. Like a group of 
the Medusa bifida, these creatures narrowly resemble a flock of mi- 
nute birds wending their course through the expanse of the firma- 
ment.” (p. 216.) 
22. Campanularia verticillata. The margin of the polype-cell is 
either “ plain or serrated,” a remark which may tend to reconcile 
the discrepancies in the descriptions of some allied species. The 
cells are normally deciduous, falling off with the decay of the 
polypes. “ The two are mutually dependent on each other,” p. 219 j 
the very reverse of what exists in the Sertulariadse. The larva is a 
planule. 
23. Campanularia dumosa. The generic relations of this species 
remain unascertained. Its structure, says Sir J. Dalyell, is very dif- 
ferent from Laomedea dichotoma or Campanularia verticillata. The 
polype is a vivid grass-green. The mode of propagation is unknown. 
24. Campanularia syringa. Another doubtful member of the genus 
Campanularia. The structure of the cell is peculiar, nor does it fall 
off on losing the polype. This has about sixteen tentacula. “That 
number has been ascertained as the complement of several. I have 
not observed any of the hydree with only eight tentacula, which is 
in fact a very rare characteristic of any of the marine hydraoid zoo- 
phytes,” p. 223.— The species which follows affords an exception to 
this remark. 
25. Sertulai'ia arcta. This is the same as the Campanularia inter 
tfxta of Couch. The polype has eight tentacula, and a few indivi- 
duals only have ten. The larva is a planula, “ but instead of being 
generated within a pod or vesicles as others from the hydraoidal 
Sertulari(B, its matrix consists of a congeries of cavities or compart- 
ments, as seen in the surface of the mass. An aperture being dis- 
covered in the middle of each after the planula has been discharged, 
we may presume that no more than one is contained in a compart- 
ment,” p. 225. The production is evidently the type of an undefined 
genus. 
We shall continue our analysis in a future number. 
In the Press. 
We are glad to learn that Mr. Gosse, author of the ‘ Birds of 
Jamaica,’ ‘ Canadian Naturalist,’ &c., is about to publish a series of 
