ON BUTTERFLY-COLLECTING IN THE ALPS. 165 



The paper concludes with the inevitable phylogenetic table, showing 

 Dr. Gadow's ideas of the lines of descent amongst birds. He holds that 

 all the highest forms of each subdivision belong to the Hologyri or 

 Mesogyri, the more primitive ones being Ortlioccela or Playioccela. 



The figures in the plates are chiefly devoted to showing, in a more or 

 less diagrammatic way, the various types of intestinal convolution 

 described in the text, and will be found very useful in elucidating 

 Dr. Gadow's views. 



In conclusion, it seems to me that, as it is a well-known fact that 

 individuals of the same species vary, sometimes very greatly, in the Ibis, 1880, 

 length of their intestines, the stowing away of a greater or less amount P- 237 ' 

 of gut in a given space, the abdominal cavity, becomes simply a 

 mechanical problem, and therefore that there is less help in forming a 

 sound view of the mutual affinities of birds to be derived from the facts 

 in this direction described by Dr. Gadow than from many other points, 

 more complicated, and therefore less easily altered, in the structure of 

 birds. 



31. THREE WEEKS' BUTTERFLY-COLLECTING IN EntM.M.xvi. 

 THE ALPS.* P. 256 (1880). 



THE following is an account of a short trip in the Alps of Dauphine 

 and Piedmont made last summer by myself, in company with Messrs. 

 Salvin and Godman, and Capt. Elwes. Our object was quite as much to 

 enjoy a change and breathe fresh air, as to catch butterflies, though we 

 devoted most of our time to the latter pursuit. We left London on 

 June 22nd, and reached it again on the llth of July, so that we were 

 only about three weeks, and as we got over a good deal of ground in 

 that time, rarely staying more than one night in a place, a large part 

 of our trip was spent in travelling. Our route was as follows : from 

 Chambery we drove, by St. Laurent du Pont, a village close to the 

 famous monastery of La Grand Chartreuse, to Voiron, and thence by 

 rail to Grenoble. From there we proceeded to Bourg d'Oisans, and next 

 day over the Col du Lautaret a driving pass about 6800 ft. high to 

 Briancon. Mr. McLachlan t had made known to us before starting his 



* Ent. Month. Mag. xvi. pp. 256-259 (1880). 



t "I visited this part of the Alps of Dauphin^ as far as the Col du Lautaret, in tne 

 beginning of July, 1876, in company with M. Constant (then of Autun, now of Cannes), 

 who joined me at Grenoble, and a botanist from the neighbourhood of Bordeaux. This 



