igo THE SCOTTISH NATURALIST 



Bittern on the Pentland Hills, and a wrong locality (Dalkeith) for 

 the East Lothian Purple Heron. The volume runs to over 700 

 pages, is nicely got up, and is well illustrated. In our opinion it is 

 one of the best books of its kind which has appeared in recent 

 years j it is something more than a faunal work. 



The Flight of Birds, by F. W. Headley, with sixteen Plates and 

 many Text-figures. London : Witherby & Co. 5s. net. 



Birds are pre-eminently masters of aerial locomotion, yet the 

 problems associated with their powers of flight are little understood 

 by the majority of ornithologists. This lack of knowledge is, no 

 doubt, to be largely attributed to the fact that the subject is 

 decidedly a technical one and that comparatively few possess the 

 necessary training to approach it. The object of Mr Headley's 

 book is to reduce these difficulties to a minimum, and his treatment 

 of the problems is as simple and as lucid as it is possible to make 

 it. The author is well known as an authority on the subject, 

 and this neat and abundantly illustrated little volume is worthy of 

 the perusal of the very numerous class of naturalists who are 

 interested in one of the leading attributes of bird-life. 



Proceedings of the South London Entomological and 

 Natural History Society, 1911-1912. Pp. xvi and 104, 

 four Plates. Price 3s. 



This Society still shows evidence of much activity on the part of 

 its members. The accounts of the Proceedings contain much of 

 interest, while the articles by Messrs Lucas and Adkin, entitled " The 

 Bracken Fern " and " Notes on the Season " respectively, are lucidly 

 written. The Annual Address, by Mr W. J. Kaye, deals with the 

 chief entomological features of 191 1, and concludes with a few 

 remarks on " Mimicry." 



The British Tunicates ; an unfinished Monograph, by the late 



Joshua Alder and the late Albany Hancock, F.L.S. Edited by 



John Hopkinson, F.L.S. , &c. Vol. III., Aggregate (Ascidicc 



composite). London: Ray Society, 1912. 12s. 6d.net. 



The publication of this volume completes the work, of which we 



have already — on the occasion of the issue of Vol. II. in 1907 — 



expressed our cordial appreciation. In the present part, which is 



devoted to the Tribe Aggregate, 53 species comprised in 10 genera 



are dealt with ; and practically all are beautifully figured in colours 



in the 16 plates. There are also many text-figures, while a portrait 



of Canon Norman, who has greatly interested himself in the work, 



