306 LITTLE GUILLEMOT.
along the rid go tf, along the edge of low»-!- mandible 1 ; tarsus middle
t e t l | ieu-lawlSuterto« 1, claw 'jj; i n n e r toe f, its claw f . Weight
ozi .
Adult Female, in winter. Plate CCCXXXIX. 1%. %
^ In winter, the throat, and the Jjwer parts o f ^ e cheeks are white ;
the sides and fore part of the neck white, irregularly, barred with
blackish-grey ; the upper parts of a duller Mack than,la summer.'
The»: is nothing very remarkable in the anatomy of'this bird, beyond
what is observed in the Auks and Guillemots. The ribs extend .
.very far back, and, having the dorsal and sternal portions mubh. elongated,
are capable of aiding in giving much enlargement to the body,
of which the internal, or thoracic and abdominal cells arc vorviarge.
The subcntano.ms.ceHs are also largely dev.dopi-d, as in mam other
diving and plunging hirds,
T t a w t f o f the mouth is flat, broad,ijjlcfti^ared with' numerous
series of short horny papilla-directed bu.-kwiirds. Thetongtie «large,
fleshy, 10 twelfths of.an Inch longs emarginate-at the base, flat above,
homfiin the back. The heart isdarge, measuring 10 twelfths in length,
8i twelffchsjin breadth. .®lse.< right lohAaf ¡the liver ,is 1& inch in
length, the left the gall-bladder is elliptical*' The kidneys are
very large. %
The oesophagus, Fig. 1, a he, is 3 »chegiX0 twelfths l»g,"Its
very thin,, its inner or mucous coat thrown into longitudinal pM&l p ;
diameter at thsS middle of theTfteck 5 eighths, diminishing to 4 twelfths
as it enters the thorax. It then'enlarges and forms the proventrrculus;
ft ¡ ¿ 'which has a diameter of 8 twelfths; the glandules are cylindrical,
.very numerous, and arranged injaS«iiplete belt, half an inch in breadth,
to the usual'-manner, as seetf in Fig. 2, The stomach, ( o o ^ so
callei f M 1 M IB oMonfe 11 twelfths m length, 8 twelfths m breadth;
its muscular coat-inoderately thick, and disposed into two lateral H H
with large tendons: its epithelium, Fig. 2, c thick, hard, with
*erous longitudinal and transverse rup,-. and of a dark reddish colour.
The duodenum,/^, curves in the usual manner at the distance of
l i inclvWnds toward the upper surface of the right lobe of the
i p r f o r l inch and 10 twelfths, then forms 4 'fcifis, and from above
the provcntriculus, passes directly backward. Tlie length of the in-
LITTLE GUILLEMOT. 307
testine, f g hi, is 16| inches, its diameter 2 J twelfths, and nearly uniform
as far as the. rectum, which is 1J inch long,: at first 3 twelfths in
diameter, enlarged into an ovate cloaca of great-size. Fig. 3, h i the
cteca a, a, 4 j twelfths long, cylindrical, twelfth in diameter, obtuse.
The trachea, i % i | H, I, is very wide, flattened, its rings unossified,
its length 2A inches, its breadth 3 twelfths, nearlyifaiform, but at the
lower part contracted to 2 twelfths. There are 75 rings, With 5 inferior
blended rings, which are divided before and behind. The bronchi,
Fig. I. »!, «!, are wide and rather elongated, with about 25 half rings.
The: contractor muscles are extremely thin, the stc.rno-traclieal slender;
there is a pair of inferior laryngeal attached to the first, bronchial
rings. •
Kg, 1. Big- 2-
The above account of the digestive organs of this bird will be seen
to be very different from that given by Sir Everard Home, who has, in
all probability, mistaken the species. " There is stilly says he, " one