1865.] MR. FLOWER ON THE GULAR POUCH OF THE BUSTARD. 747 
1. SaxrcoLa castor, ¢. 
Major ; cinerea, remigibus fuscis ; corpore subtus viz pallidiore ; 
tectricibus caude superioribus albis ; rectricibus 4 intermediis 
Jusco-nigris, ternis lateralibus albis, apice late Susco-nigris, 
quarta nigricante, basi alba; rostro et pedibus nigris. 
Long. circa-7", rostr. 7", al. 4", caud. 2" 10!", tars. 13h", 
Hab. Karroo; Afr. mer. (Layard). 
2. SAXICOLA POLLUX, ¢. 
Minor ; cinerea, gutture pectoreque pallidioribus ; abdomine imo, 
erisso et subcaudalibus albis; remigibus fuscis, primo apice 
conspicue emarginato-attenuato ; rectricibus 4 mediis Susco- 
nigris, ternis lateralibus pogonio externo albis, interno Suscis, 
extima apice tota fusca, quarta apice latius fusca ; rostro et 
pedibus nigris. 
Long. 63", rostr. 6!, al. 4" 1!, caud. 2" 10, tars. 14", 
Hab. Karroo (Layard). 
Obs. Primo aspectu simillima preecedenti, sed minor, cauda alis et 
tarsis pro mole longioribus, subcaudalibus albis ; rectricum coloribus 
alio modo dispositis. 
8. On THe Guxar Poucu or THe Great Bustarp (Orts TARDA, 
Linn.). By W. H. Frower, F.R.S., etc. 
In ‘ The Ibis’ for 1862 (p. 107) Mr. Alfred Newton gave an ex- 
haustive summary of the literature of the much-vexed question of the 
presence or absence of the “ gular pouch”? in the male Bustard, toge- 
ther with an account of a dissection performed by several competent 
persons (the author included), in which no trace of this remarkable 
organ was found. Stimulated to the research by Mr. Newton’s re- 
marks, Dr. W. H. Cullen of Kustendjie, in Bulgaria, took advantage 
of the frequent occurrence of the bird in his neighbourhood to renew 
the investigation, and found in each of the two specimens which he 
dissected a distinct and largely developed pouch. A description and 
figures of these were communicated to ‘ The Ibis’ (April 1865, p. 143). 
The identical specimens having, through Dr. Cullen’s kindness, been 
sent to the Museum of the Royal College of Surgeons, I have now 
the pleasure of exhibiting them to the Members of the Society, and 
of making a few observations upon their form and structure, con- 
firmatory of, and supplemental to, those of Dr. Cullen. 
Of the specimens received, the one consists of the lower mandible, 
the tongue, the hyoid apparatus, the upper portion (about 2 inches) of 
the cesophagus and trachea, and the gular pouch dissected away from 
all its attachments, except at its neck ; the second is the pouch alone 
cut off through the neck ; and this being therefore of comparatively 
little interest, I shall chiefly confine my observations to the first. 
In the mesial line of the floor of the mouth, immediately under 
the root of the tongue, is a distinct and unquestionably natural 
opening. In what appears.to be the usual contracted condition of 
