THE GREAT ANTEATER. 125 
p. 130. The salivary bladder (e) is relatively larger than in the Great Anteater, and is a 
simple pyriform sacculus receiving the secretion of the great gland by three or four short 
ducts, entering obliquely at its fundus: the apex of the bladder is continued into the 
long and slender duct which terminates in the mouth just behind the symphysis man- 
dibule. Figure 2 of Pl. XL. shows a further dissection of the right submaxillary salivary 
gland and bladder in another species of Armadillo (Dasypus Peba'). The saliva which 
these reservoirs contain is very tenacious, the serous part being probably absorbed 
during its detention. Thus prepared and accumulated, it is expelled at the extremity 
of the mouth, in order to lubricate the tongue, which is thus, as in the Anteaters, made 
subservient to the catching of insects”. 
In the Spiny Anteater of Australia (Echidna), the homologues of the submaxillaries 
are as largely developed as in the hairy Anteaters of America, and are subpectoral and 
subcervical in position; but they are not blended together. The primary lobes are 
fewer and larger than in the Myrmecophage, and the secretion is carried from each gland 
by a single relatively very wide duct. When the duct has reached the interspace of 
the lower jaw, it dilates and then divides into eight or ten undulating branches, which 
subdivide and ultimately terminate by numerous orifices upon the membranous floor of 
the mouth. This unique modification of a salivary apparatus is figured and described 
in my Article Monotremata of the ‘ Cyclopedia of Anatomy and Physiology,’ 8vo, vol. iii. 
1847, p. 388, fig. 188. 
Muscles of the Mandibular and Hyoid arches, and of the Tongue. 
Mylohyoideus.—The muscle answering to the mylohyoideus is of unusual extent, and 
is divisible into different portions: the first of these is a thin layer of transverse fibres 
(Pl. XXXVII. fig. 1, 9), extending from the symphysis menti about five inches back- 
wards: the fibres pass from the under and outer side of one mandibular ramus to 
the opposite ramus, and are attached along the middle line of their central surface to 
the long and thin tendon of the geniohyoideus: the posterior transverse fibres overlap 
the anterior termination of the second division (h) of the mylohyoideus. The trans- 
verse fibres of this division arise externally, or laterally, from the inner side of each 
mandibular ramus, and are attached mesially and centrally to a continuation of the 
tendon of the geniohyoideus, which may be seen shining through the fibres of the mylo- 
' Proceedings of the Zoological Society, 1832, p. 130. 
2 The preparations exemplifying the above interesting modifications of the salivary apparatus are preserved 
in the Physiological Series of the Museum of the Royal College of Surgeons, Nos. 772 Land M, and are 
described in the first volume of my Catalogue of that Series, p. 228, 4to, 1831. Prof. Rapp, in his excellent 
work, ‘ Uber die Edentaten,’ 4to, 1843, has given a figure of this structure, in the Dasypus peba, and refers to 
a description of it in an Inaugural Thesis by Winker, “ Dissertatio sistens observationes anatomicas de Tatu 
novemcincto. Pres. Rapp. ‘Tubingen, 1824.” This Thesis I have never seen, nor, as yet, been able to obtain: 
I became aware of its existence only through the reference in the work above quoted. 
