86 EVOLUTION AND DISEASE. 
A well-marked specimen of cervical auricle in a goat 
is sketched in fig. 42: these auricles are situated at a ~ 
spot corresponding to the external orifice of the third 
branchial slit of the embryo. 
The auricles are not confined to any particular species 
of goat; the one sketched above is a cross between a 
Fic. 44.—Magnified view of a section of a cervical auricle removed 
from a baby’s neck. C, cartilage ; M, muscle-fibre ; F, fat. 
Nubian and a common goat. In fig. 43 a sketch is 
given of the head of an Egyptian goat (Hzrcus thebaicus), 
made from life by Mr. R. E. Holding from a specimen 
which was living in the Jardin des Plantes, Paris. — 
Their existence in the pig has been recorded, and a 
horned sheep with two well-marked cervical auricles 
is figured on page 63. 
