Recently published Ornithological Works. 347 



licel-pads found in the nestling Green Woodpecker; these 

 are also known to be present in the Wryneck and the 

 Barbet {Cyanops). 



By a printer's error Col. Stonham's name was accidentally 

 omitted from the last printed list of our Members, but he 

 was a M.B.O.U. till his death, Avhich deprives us not only 

 of an enthusiastic fellow-ornithologist, but also of a brilliant 

 surgeon. 



XVIII. — Notices of recent Ornitholoyical Publications. 



Bonhote on Vigour. 



[Vigour and Heredity. By J. Lewis Bonliote, M.A., F.L.S., F.Z.S. 

 Pp. 1-276, with coloured and uncoloured plates and diagrams in text, 

 London (West, Newman & Co.), 1915. 8vo.] 



The study of the principles which underlie the inheritance 

 of characters is the only road along which we are likely 

 to make much headway in the elucidation of the many 

 outstanding problems which are for ever confronting the 

 zoologist of today. The laws, for instance, which govern 

 the evolution of geographic species or subspecies ; the 

 problem of many very closely allied species inhabiting 

 the same localities, living under the same conditions, and 

 yet differing slightly and constantly without the inter- 

 mingling of characters ; the ready adaptability of some 

 species, the immutability of others ; the fertility of some 

 hybrids, the infertility of others. These and a host of 

 other kindred problems which will readily suggest them- 

 selves are, as Mr. Bonhote implies in his recent book on 

 " Vigour and Heredity,^' not likely to be solved except as 

 the result of much patient investigation, in the experimental 

 breeder's pen, in the gardens of the horticultural scientist, 

 or in the laboratory of the physiologist. If the assiduous 

 collection and description of daily increasing hosts of specific 

 or subspecific entities, necessary as that colossal task has 

 been, has not advanced us very far towards the solution 



