2 Mr. W. A. Forbes on the late Professor Garrod's 



birds. Of these a complete list will be found in the January 

 number of this Journal for last year*. All of these^ except 

 two t, are morphological in nature ; but many of the characters 

 of birds from the physiological side were fully expounded in his 

 series of Fullerian Lectures at the Royal Institution and 

 elsewhere. At the time of his death Prof. Garrod was also 

 engaged on an article on the mechanism of flight; for his 

 wonderful mechanical skill enabled him to explain and demon- 

 strate this and other physiological problems in a method but 

 rarely to be met with amongst biologists generally. But this, 

 unfortunatelyj he left in an unfinished condition. 



In the present article I propose first to consider those 

 points in the anatomy of birds first brought into notice, or 

 worked out in large groups, by Garrod, and secondly to con- 

 sider the light thrown by these facts on the correct collocation 

 of various genera, or larger groups, as well as on the arrange- 

 ment of these latter into groups of a still higher power. But 

 I shall avoid, as far as possible, any comparisons with previously 

 proposed classifications, as it is not my wish to enter, in this 

 place, into discussions of that kind. Under each of these 

 headings I shall endeavour, as far as is consistent with clear- 

 ness and conciseness, to preserve a chronological order. 



* In addition to his published papers on birds, Prof. Garrod was en- 

 gaged, as probably many of the readers of ' The Ibis ' are aware, on a 

 general account of the Anatomy of Birds, to be published in three fasciculi. 

 As originally planned, the first fasciculus of this work was to contain a 

 complete account of the anatomy (not including the histology) of the 

 common Fowl, as a type of all birds ; the second was to be occupied 

 with a comparative account of the " soft parts " in the different groups ; 

 whilst the third was, I believe, to have been devoted to osteology and a con- 

 sideration of the results arrived at as regards classification. Of these three 

 fasciculi, the first was nearly completed at the time of his death, and the 

 second left about half done, nearly all the groups of the " Ilomalogonatous " 

 birds being treated of in it, together with some of the remaining ones. 

 The MS. of both of these portions has been, fortunately for our science, 

 preserved ; and it is my hope some day to complete the work for publi- 

 cation in a form worthy of its original author. 



t "On the Mechanism of the Gizzard in Birds," P. Z. S. 1872, 

 pp. 525-529 ; « On a Point in the Mechanism of the Bird's Wing," P. Z. S. 

 1875, pp. 82-84. 



