C. M. Jackson . 79 
distal region. In no other animal observed did castration apparently 
increase the amount of fat present. No observation was made on cas- 
trated dogs or cats.” An investigation of the histological changes in 
the penis of a eunuch would be of much interest since, so far as I know, 
no observations have been made upon this point. 
The adipose structure of the clitoris, which is interesting in this con- 
nection, has been ob- 
served in various ani- 
mals. Bonnet * men- 
tions the dog, cat. 
pig, cow, guinea-pig. 
sheep, goat, and 
states that the adi- 
pose structure is 
fully established in 
the 3 months’ old 
pig, and 4 months’ 
dog. The latest ref- 
erence to the subject 
which I have seen is 
found in Ellenberger 
and Giinther’s text- 
book,’ p. 197, from 
which the following 
is quoted, referring 
to the clitoris: “Beim 
Pferde sind dieselben 
wie das Corpus cay- 
Fria. 7. Cross-section through the injected clitoris of a cat. 
ernosum urethree ge- 25. Stained with haematoxylin. A, tunica albuginea; CC, 
adipose corpora cavernosa; dy, dorsal vessels; dn, dorsal 
baut, werden aber. nerve of clitoris; P, Pacinian body; vp, venous plexus; ep, 
surface epithelium. 
von einer starken 
Albuginea umgeben. Bei allen anderen Tieren findet man in den 
Maschen des Balkengeriistes Fettzellen, die beim Hunde in so grossen 
Mengen zugegen sind, das die Corpora cavernosa einem derben Fetts- 
trange gleichen. Ein Septum teilt die Fettmasse in zwei Halften. An 
3Retterer observed that in castrated cats the numerous recurved spines of the 
glans disappear, but makes no statement concerning changes in the corpora 
cavernosa. 
4 Bonnet, R., Grundriss der Entwicklungsgeschichte der Haussiugethiere. Berlin, 
1891. 
>Ellenberger and Giinther, Lehrbuch der vergleichende Histiologie. Berlin, 1901. 
