3d4 New Scientific Books, [Nov, 



extended to the internal concavity of the cruataceous plate, to 

 which the dorsal arms are attached, in the same manner as it 

 is produced down the stem of the Encrinus, so that there appears 

 every reason to beheve that this genus, and the Ciinoidea of 

 Miller, should fornfx one family, to which the name of Encrinidoi 

 might be attached, on the right of priority. 



While on the subject of the star-like animals, I may remark, 

 that after examining numerous specimens of Ophiura and Euryale^ 

 preserved in spirits, I have not been able to find any provided 

 with the corpus spongiosus of Spix, and this, together with their 

 want of Ambulacra on the lower surface of the rays, for the 

 passage of the sucker, incline me to form them together into a 

 family under the name of Ophiuridcc, and to leave only the 

 genus Asterias of Lamarck, which is capable of being separated 

 into two or three groups, as the family Asteriadce, whose habits 

 and manners of living differ greatly from the former family, 



9. Splendid Collection of Shells, 



We are happy to announce that a further opportunity of 

 becoming possessed of specimens from the splendid collection 

 of shells, formed by the late Earl of Tankerville, is about to be 

 offered to the public. This matchless collection, together with 

 a, large addition from several other collections, consisting in the 

 whole of about 4000 species, and more than 40,000 specimens, 

 will soon be brought forward for sale, by public auction, by Mr. 

 G. B. Sowerby. 



The collections may be seen at 156, Regent-street, where also 

 may be obtained copies of a plan for the disposal of them, 

 affording peculiar advantages to naturalists and scientific 

 collectors. 



Article XVI. 

 NEW SCIENTIFIC BOOKS. 



PREPARING FOR PUBLICATION. 



Elements of Logic, containing the substance of the article on that 

 subject, in the Encyclopaedia Metropolitana ; by the Rev. R. Whately, 

 DD. 



A Treatise on the Steam-Engine, Historical, Practical, and Descrip- 

 tive ; bv John Farey, Engineer. Illustrated by numerous engravings, 

 by the late Mr. Lowry. 



A Personal Narrative of a Journey from India to England, by Bas- 

 sorah, Bagdad, the Ruins of Babylon, &c. in the Year 1824. By Capt. 

 the Hon. G. Keppel. 



A Sequel to the Diversions of Purley; containing an Essay on 

 English Verbs, with Remarks on Mr. Tooke's Work, and on somq 

 Terms employed to denote Soul or Spirit ; by John Barclay. 



