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. bombinus. B. igneus, 
SS SS 
aoe. fe ae 
millim, millim. millim, millim, 
From snout to vent.. 46 46 46 42 
ead eer as ee et 14 14 13 
Width of head...... 15 15 15 11 
Hore: limb!,..........-« 23 20 21 20 
Eimaimb! ...... a0. 8o 51 52 48 
hibias. Sec ete LG i) 14 13 
Foot, from inner meta- 
tarsal tubercle .... 15 14 16 15*5 
EXPLANATION OF PLATE L. 
Fig. 1. Bombinator bombinus. 
igneus. 
a. Adult female, upper view. 
6, Adult female, lower view. 
e. Young, upper view. 
d. Young, lower view. 
e. Breeding male, lower view of foot. 
f. Breeding male, musculature of the throat. 
5. Additional Notes upon the Anatomy of the Trochili, Capri- 
mulgi, and Cypselide. By R. W. Suurstpt, M.D. &e. 
[Received July 9, 1886.] 
To the meeting of this Society on December 1, 1885 *, I com- 
municated a paper on the “ Comparative Osteology of the Trochilidz, 
Caprimulgide, and Cypselidze,” 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, 
et I find an unfortunate error has crept into the drawings of one 
of the Plates in the paper in question (plate lIxi. fig. 3). How 
this happened it would be impossible for me to say at the present 
time, but the humerus of Zrochilus 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 disarticulated for the purpose of 
studying the details, may have had something to do with the mistake, 
1 See P. Z. 8. 1885, p. 886. 
