Bauhaus-Universität Weimar

The Cyclopaedia of Anatomy and Physiology, vol. 4: Pla [corr.: Ple] - Wri
Todd, Robert Bentley
and S. Inuus *, two sacs. Laryngeal aperture 
situated at the base of the epiglottis, oval or 
circular. Voice acute ; quality hoarse : cause, 
laryngeal sacs. 
Fig. 895. 
Larynx of S. Cercopiihecus. 
A. a, epiglottis ; b, os hyoides ; c, sac ; e, trachea. 
b. f, cavity of the os hyoides. 
Albino Baboon. — Os hyoides : base, b 
(fig. 896.) excavated, inclosing a sac, c; 
Larynx : H. *75 in.; Thyroid : upper margin 
concave, lower irregular ; Cricoid : a vertical 
Fig. 896. 
Larynx of an Albino Baboon, 
b, section of the os hyoides, showing the inclosed 
sac c ; d, thyroid ; /, crico-thyroid space ; e, trachea. 
ridge rising from the posterior surface, the 
cartilage tapering towards the anterior surface 
* Ludwig. 
which is very narrow; Crico thyroid space: 
large ; Epiglottis : apex obtuse. 
In the monkeys of America, some species 
have sacs appended to the larynx, the most 
complicated form of which is observed in 
Simla Senicuius, or Red Howling Monkey.— 
Os hyoides, base excavated ; opening quad¬ 
rangular. Thyroid, volume three times that 
of man * Cricoid elliptical, nearly osseous. 
Pomum large and excavated, into which pris- 
matico-oval sacs open ; sacs also communi¬ 
cating with the larynx by a semilunar open¬ 
ing at the base of the epiglottis. Arytenoids 
small. Cuneiform absent ; instead of them, 
prominence.f Vocal ligaments: superior im¬ 
bedded in tendino-cartilaginous masses in¬ 
ferior inserted at base of pomum. Ventricles 
passing on each side of epiglottis, which is 
connected with an infundibuliform sac, po¬ 
mum, and oval pharyngo-laryngeal sacs.ÿ 
Voice intense; howl discordant. 
S. Appell a and S. Capucina. — Os hyoides 
not excavated. Thyroid, cricoid, and aryte¬ 
noid, like man. Cart. Santorini large, and 
curved backwards. Cuneiform absent ; their 
place supplied by fatty tendino-cartilaginous 
masses meeting each other to form a channel 
for the passage of air : in shape like the letter 
S. || Voice: quality like a flute, hence called 
Whistling Apes ; expression, a plaintive me¬ 
lody, from which they are also called Weeping 
S. Rosalia. Larynx perforated at the 
thyro-cricoid ligament, below the thyro-aryte- 
noid ligament ; aperture circular, sac small. 
S. Coaita. Larynx like the Sapajous. Tra¬ 
chea dilated behind the cricoid cartilage. 
S. Ateles arachnoïdes.—Os hyoides : base 
quadrangular, excavated. Larynx: cariilages 
of Santorini with masses substituted for cunei¬ 
form cartilage. Vocal ligaments : superior 
give rise to the cuneiform masses ; inferior 
lie over the superior Î at their insertion.** 
Epiglottis: apex notched and connected with 
the cuneiform fibro-cartilaginous masses. 
Voice acute ; quality hoarse ; melody, a 
plaintive cry. 
Lemur. L. gracilis. — Os hyoides : base 
not excavated. Larynx : no sac. H. U'33 in. 
Thyroid : wings united at an obtuse angle ; 
margins, superior oblique, inferior parallel to 
superior. Cricoid elliptical ; margins, supe¬ 
rior and inferior depressed. Crico-thyroid : 
chink large, rhomboidal. Epiglottis rounded ; 
at its base a pit. L. 0‘133 in. 
L. tardigradus. Cornua elongated and 
united with first ring of trachea.-f-f In Lem. 
Mongoz and L. Catta are processes running 
from the epiglottis to os hyoides. Voice in 
Mongoz, a peevish kind of cry when irritated. 
Cheiroptera. Phyllostoma Spectrum.—Os 
hyoides like that of Lemurs. Larynx : H. 
0-5 in. Thyroid like the Lemurs ; notch, su¬ 
perior absent; prominence small; margins, 
* Brandt. t ïbid- Î Ibid- 
§ Humboldt describes six laryngeal sacs. Cam¬ 
per one. Vicq. d’Azyr, Cuvier, and Brandt more 
than one. 
|| Cuvier. Brandt. 1 Cuvier. 
** Brandt. tt Ibid-


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