1886.] 



ON THE ANATOMY OF THE TROCHILI, ETC. 



501 



Magdeburg, informs me that it is only found in the plain and never 

 occurs in company with B. bombinus, which, however, may inhabit 

 the same districts, but only at a certain altitude, as is, for instance, 

 the case in Thuringia. 



Dimensions. 



B. hombiniis. B. igneus. 



millim. 



From snout to vent . . 46 



Head 14 



Width of head 15 



Fore limb 23 



Hind limb 55 



Tibia 16 



Foot, from inner meta- 

 tarsal tubercle .... 15 



14 



16 



EXPLANATION OP PLATE L. 



Fig. 1. Boinhinator bombinus. 

 2. igneus, 



a. Adult, female, upper view, 



b. Adult female, lower view. 



c. Young, upper view. 



d. Young, lower view. 



e. Breeding male, lower view of foot. 



/. Breeding male, musculature of the throat. 



15*5 



5. Additional Notes upon the Anatomy of the Trochili, Capri- 

 mulgi, and Cypselidce. By R, W. Shufeldt, M.D. &c. 



[Eeceived July 9, 1886.] 



To the meeting of this Society on December 1, 1885 *, I com- 

 municated a paper on the " Comparative Osteology of the Trochilidse, 

 Caprimulgidae, and Cypselidse," wherein I ventured to bring forward 

 certain anatomical facts in support of Professor Huxley's expressed 

 opinions upon the probable relations of the Humming-birds, Swallows, 

 Swifts, and Nightjars (P. Z. S. 1867, p. 415). 



Although it does not in any way alter the general comparisons I 

 made in my first contribution to this subject, nor my conclusions, 

 yet I find an unfortunate error has crept into the drawings of one 

 of the Plates in the paper in question (plate Ixi. fig. 3), How 

 this happened it would be impossible for me to say at the present 

 time, but the humerus of Trochilus alexandri in this figure is the 

 right one, and not the left as stated in the text. It is quite possible 

 that the extraordinary position of the pneumatic foramen in this 

 bone, taken in connection with its diminutive size, or confusing the 

 pair after the skeleton had been disarticidated for the purpose of 

 studying the details, may have had something to do with the mistake. 

 I'See P. Z. S. 1885, p. 886. 



