STUDIES OE THE MACROCHIRES. 
347 
flexor longus hallucis enjoyed a greater degree of freedom tlian 
had been found by the anatomist just quoted to exist in JBuceros 
rhinoceros , which I believe to be as he found it in Gaprimulgus ; as 
in Chorcleiles, it is easily separable from the deep flexor along its 
side , thus approaching somewhat more nearly the condition as 
found in Momotus lessoni. 
Other Notes. 
Cuvier, Nitzsch, and Beddard (P. Z.S. 1886, p. 147) have 
all made careful examinations of the syringes of the Gapri- 
mulgi ; and the tracheo-bronchial syringes of Gaprimulgus and 
Ghordeiles are well known. I have investigated this part of the 
anatomy of the forms before me, and find they agree in all parti- 
culars with the descriptions given by the above authorities ; all of 
which will obviate the necessity of my entering upon further 
details here. Beddard’s paper, just alluded to, is a real contri- 
bution to the anatomy of these parts for the Caprimulgi, and will 
well repay reading in the present connection. 
Antrostomus has two carotids present, taking the usual course 
up the neck in the mid-vertebral canal. This agrees with what is 
already known for Gaprimulgus and Ghordeiles ; and I verified the 
fact in the latter bird in the specimen at hand. 
Intestinal cseca are present in both Antrostomus and Ghordeiles, 
being in each case a long slender pair (fully 4 centimetres in 
length), and each about one half the calibre of the intestine to 
which they are attached. 
Upon investigation I find that Antrostomus possesses a small 
gall-bladder, while the several species of Ghordeiles lack this 
organ : this confirms the observations of Mr. Beddard, who found 
that in the latter case Glarrod had also left a MS. note to that 
effect (P. Z. S. 1886, p. 151). 
The form of the oesophagus and stomach is pretty much the 
same in both the Whip-poor-will and Nighthawk, although as 
regards size it is comparatively larger in the latter bird. I find 
it to be a flask-shaped pouch, somewhat compressed from side 
to side, with the walls of a fairly uniform thickness, and com- 
posed of strong rugse. These, commencing at the lateral tendinous 
centres at either side, curl round and round in double loop until 
they come to the oesophageal tube, which they ascend for a short 
LINN. JOURN. — ZOOLOGY, YOL. XX. 27 
