400 Bibliographical Notices. 



same colour. This was thought to be caused by a small " Branchio- 

 pode," Ariemia salina. The examinations of M. Dunal found how- 

 ever that this little animal, though abounding, was perfectly co- 

 lourless, or rather white than red; and continued observation has 

 shown him that the colouring matter proceeded from a minute Pro- 

 lococcus, to which he has applied the name of sali/ius. The orange 

 red again, or rosy colour, he found produced by another plant, to 

 which the name of Ihcmatococcus salinus has been applied ; but at 

 the same time, he observes, that the Protococcus may turn out to be 

 only the young state of the other. Among the " Scientific Intelli- 

 gence" is recorded the discovery of Carex leporine, Linn., Loch-Na- 

 gar, by Mr. Dickie, of Aberdeen. 



Works in the Press. 



A History of the British Zoophytes. By George Johnston, M.D., 



Fellow of the Pvoyal College of Surgeons of Edinburgh, &c. 

 The object of the present work is to describe every species of this 

 interesting class of animals ascertained to inhabit the British Islands. 

 The first part of the volume is devoted to the history of zoophytology, 

 and to details on the structure, physiology, and classification of 

 zoophytes ; and the second contains the description of the species. 



We are perfectly convinced, that this volume will not only be 

 an acceptable one to scientific naturalists, but to all those who, 

 through various channels, have heard of the discoveries relating to 

 this class of beings in the memoirs of Trembley, Baker, and Ellis. 

 The work of Ellis on the British Corallines, published in the year 

 1755, has been long out of print, and is now extremely rare. But 

 the present author, with a complete knowledge of everything that 

 has been previously written on the subject, has given correct details 

 regarding all the species hitherto discovered from personal observa- 

 tion ; and his known talents leave it little doubtful that this work 

 will in future be a standard one in all that regards the Natural Hi- 

 story of British Zoophytes. 



Since the publication of Ellis's Essay on Corallines in 1755, no 

 separate work has appeared in illustration of the history of British 

 zoophytes. In the mean time, a much more accurate knowledge of 

 the structure and habits of these remarkable productions has been 

 attained, and many curious species have been discovered in our seas, 

 the notices of which lie scattered through numerous volumes of a 

 miscellaneous nature, often very difficult to procure, and not attain- 

 able without considerable expense. To collect into one volume, of 



