Pallas' s Sand-Grouse in 1863. 191 



Modern Geography' (Edinburgh and London, 1861). This plan 

 not only affords a means of classifying the different occurrences, 

 but also provides, as it were, a convenient index for finding out 

 the places on the Sketch-Map (Plate VI.) accompanying this 

 paper, and concerning which I must say a few words. I have 

 spared no trouble in preparing it, and yet the result is not en- 

 tirely satisfactory to me. This, I believe, is chiefly owing to the 

 small scale on which it has been drawn; but of two evils I wished 

 to choose the least, and I believe that a map which has to be 

 unfolded when referred to is always looked upon as an incum- 

 brance. On the other hand, I fully admit that the crowding of 

 the names of places in some parts (the natural consequence of this 

 small scale) is a very serious drawback, the more so that it often 

 prevents the exact locality being accurately indicated. I have 

 therefore to pray the kind indulgence of my readers for this last 

 imperfection *. To keep the map as distinct as possible, the name 

 of not a single place has been inserted at which a Syrrhaptes has 

 not been recorded as observed either in 1863 or the present 

 year. The general intelligence of my readers will, I am sure, 

 supply the omission of rivers and mountains, as well as the names 

 of countries, the insertion of which woxild only have compli- 

 cated the map's general appearance, while it would have thrown 

 no light on the course of the movement t- Here also I must 

 express my thanks to the many friends who have assisted me in 

 drawing up this paper, especially to those naturalists who have 

 been so very kind as to forward me advance-sheets of their own 

 articles on the subject, among whom I have to name the Editors 

 of the ' Journal flir Ornithologie," Mr. John Hancock, Professor 

 Reinhardt, and M. de Selys-Longchamps. Nor are my obliga- 



* This defect will be most perceptible in the case of several of the 

 localities in Cambridgeshire, which, in order to obtain the requisite space 

 for writing their names clearly, have been of necessity placed on the wrong 

 side, west, instead of east, of the meridian of Greenwich. 



t I am sorry to say, the geographical knowledge of many naturalists is 

 far from being what it ought to be. In reference to the present subject, I 

 find numerous errors of this class, some of which are almost laughable. 

 Borkum, for instance, is s])oken of as in the Baltic; Sarepta is placed in the 

 Crimea; but, worst of all, Jutland is made a " cuutre'e de Groenland" !! 



