108 REPORT—1862. 
The genus Stawridia was nearly allied to Coryne, but was distinguished from it 
by having tentacles dissimilar in character. Its upper tentacles were furnished with 
lobular tips, its lower were filiform and rigid ; in Coryne all the arms were capitate. 
The S. producta was a small, creeping, unbranched form ; the C. eximza was branched, 
and attained a considerable size. et of the life-series of these two Hydroids, thus 
dissimilar in general character, one term was identical. A strictly analogous fact 
would be the production of flower-buds absolutely identical by two plants of dif- 
ferent genera. 
Reference was also made to the close similarity, if not perfect agreement, 
existing between the Medusoid of Coryne eximia and that of the C. Sarsit of Lovén. 
The author then described the gonophores of the Stawridia producta, and the 
development of its Medusoid, which was characterized as having a somewhat bell- 
shaped umbrella, studded with thread-cells ; a rose-colowred manubrium, with a 
simple mouth; four radiating vessels; four tentacles, which originated in as many 
rose-coloured marginal tubercles, on one side of which was a dark reddish-brown 
ocellus. The arms were very extensile, set with knot-like clusters of thread-cells, and 
terminating in aspherical bulb. There were no marginal bodies except the tentacles. 
The author objected to the use of the term Medusord to designate the free repro- 
ductive body of the Hydroida, as tending to perpetuate a false conception of the 
nature of the sexual zooid. It helped to keep up the idea of its distinct and absolute 
individuality, and to conceal its real significance as the mere equivalent of the 
flower-bud in the plant. In the life-series of the i eee the polype was the alimen- 
tary zooid, and the sexual element or term might be conveniently and correctly 
designated the gonozoord. 
On a Species of Limopsis, now living in the British Seas ; with Remarks on the 
Genus. By J. Gwyn Jerrreys, F.R.S.* 
The author described the animal of Limopsis aurita (Brocchi), which he had 
lately taken by arPdaty off the north coast of Shetland, and he gave an historical 
account of the genus. This discovery, in a recent state, of a shell previously known 
only as a tertiary fossil, was adduced by Mr. Jeffreys in support of an opinion which 
he had elsewhere expressed, that many species of Mollusca, which were supposed 
to have become extinct, existed somewhere in the vast extent of the present sub- 
marine area. A knowledge of the animal of Zimopsis, and of the true position of 
the genus, was among the desiderata of both conchologists and geologists. A list 
of the recent species, with particulars of their synonymy and habitat, was appended 
to the paper. 
On a Specimen of Astarte compressa having its Hinge-teeth reversed. 
By J. Gwyn Jerrreys, /.RS. 
The author exhibited a specimen of Astarte compressa, taken by Mr. Robert 
Dawson in the Moray Frith, having only one primary tooth in the left valve, and 
two primary teeth in the right valve, being the contrary of what usually occurs. 
The muscular impressions were in their ordinary position. Mr. Jeffreys considered 
this to be a case of partial or incomplete reversal, and that it was different from 
the cases of reversed bivalves which had been noticed by Dr. Gray in the ‘Geological 
Journal’ for 1824 and ‘ Philosophical Transactions’ for 1833. In those cases the 
shell was ineguivalve ; in Astarte it is equivalve. 
‘Notice of some Objects of Natural History lately obtained from the Bottom of 
the Atlantic. By Prof. W. Kine. 
Her Majesty’s ship ‘Porcupine’ has been engaged during a portion of the past 
summer in taking deep-sea soundings on the west coast of Ireland, in connexion 
with the proposed Atlantic-telegraph scheme ; and the author has been authorized 
by the Lords Commissioners of the Admiralty to draw up a report on the various 
organic and inorganic objects obtained during the expedition. 
* See Annals of Natural History, 3rd ser., vol. x. p. 343. 
