348 Zoological Society. 



14. Aster acanthion Miilleri, Sars. 



15. Salpa runcinata, Chamisso. A very elaborate history of the 

 species. 



16. Salpa spinosa, Otto. Described with fullness equal to the 

 preceding. 



17. Filograna implexa, Berk. 



18. Oligobranchus (nov. gen.). ■* Corpus teres arenicoliforme 

 cauda attenuata, segmentorum quodque ex annulis quatuor compo- 

 situm. Caput distinctum, antice truncatum, tentaculis duobus bre- 

 vibus ; os subtus proboscide brevissima inerme ; anus terminalis 

 cirris quatuor. Pinnae in segmento quoque utrinque duse discretae 

 ex mammillis cum fasciculis setarum capillarium constantes, in seg- 

 ments anticis 14 — 15 absque appendicibus, in reliquis vero et cirro 

 superiori et inferiori conico seu fusiformi ornatae. Branchiarum ar- 

 buscukeformium ramosissimarum paria quatuor in segmentis anticis 

 corporis supra et pone pinnas in dorso." This genus, as Sars after- 

 wards learned, is the same as the Scalibregma of H. Rathke instituted 

 in 1843; but it is doubtful whether Sars' species — Oligobranchus 

 roseus — is the same as the Scalibregma inflatum of Rathke ; the pro- 

 bability is that they are distinct. There is reason to believe that the 

 genus Travisia of Dr. Johnston (184(1) will have to merge also in 

 Scalibregma ; the Travisia apparently having been imperfectly and 

 erroneously characterized from the bad condition of the specimen in 

 the Doctor's possession : see Ann. Nat. Hist. iv. p. 375. An exami- 

 nation of a living individual of Travisia is required to clear up all 

 doubts. 



In the Press. 



We are glad to learn that a new work on the British Shells and 

 Mollusca, the joint production of Prof. E. Forbes and Mr. Sylvanus 

 Hanley, which is intended to appear in Van Voorst's series of British 

 Zoology, is considerably advanced. All the known species are pro- 

 posed to be delineated, and seventeen of the copper plates are already 

 engraved by Mr. Sowerby, jun. 



Professor Daubeny of Oxford has in the press, and nearly ready 

 for publication, a new and much enlarged edition of his Description 

 of Active and Extinct Volcanos. 



The present Edition will be found to contain nearly twice the 

 amount of matter included in the preceding one, embracing not only 

 such new facts and observations with respect to volcanos as have 

 been brought to light since its first appearance in 1826, but likewise 

 the allied phenomena of Earthquakes and Thermal Springs, as well 

 as a fuller discussion of the theories connected with those subjects. 



A work is in preparation by Mr. H. E. Strickland and Dr. A. G. 

 Melville on the Natural History and Osteology of the Dodo, the 

 Solitaire, and other extinct birds of Mauritius, Bourbon and Rodri- 

 guez. It will be published in 4to by Mr. Lovell Reeve, and will be 

 illustrated by numerous lithographic plates, woodcuts and other en- 

 gravings. 



