ON THE STRUCTURE OF THE CORPORA CAVERNOSA IN THE 
DOMESTIC CAT. 
BY 
Cc. M. JACKSON, M.8., M. D. 
From the Anatomical Laboratory, University of Missouri. 
WitH 7 TExtT FIGURES. 
Some years ago in examining sections of the cat’s penis, I was sur- 
prised to find that the corpora cavernosa are composed of adipose tissue. 
Having repeatedly observed a similar condition in different specimens, 
and finding no description of the same in 
the literature, I have recently made a 
careful examination of about thirty speci- 
mens, from cats of various ages, in order 
to determine whether this occurrence be 
normal and constant. The results of this 
investigation, together with a few obser- 
vations concerning similar relations found 
in other domestic animals, are included in 
the following pages. In this connection, 
I would express my thanks to Dr. L. F. 
Barker, of the University of Chicago, in 
whose laboratory some of the latter part 
of the work was done. 
The specimens examined, 34 in all, 
were preserved in formalin (5%) or a mix- 
ture of formalin and alcohol (formalin 
5%, alcohol 70%). The vessels were in- 
jected with Griibler’s gelatin injection 
mass. Five specimens were imbedded in 
celloidin or paraffin and sectioned. 
ome 
Fic. 1. Ventral surface of the 
penis of thecat. «2. u. urethra; 
cg, Cowper’s glands; ce. crus penis, 
covered by ischiocayernosus;  b, 
bulbus urethrae, covered by bulbo- 
cavernosus; rp, retractor penis 
muscle; pr, prepuce; g. glans 
penis; me, meatus urinarius ex- 
ternus. 
The remaining specimens were ex- 
amined after hardening, by means of free-hand razor sections. 
The penis of the cat has the typical mammalian form, as shown in 
Wig: 1. 
Within the glans is sometimes found the os penis (Figs. 2 
1 There is a brief reference in Bonnet’s ‘‘Entwicklungsgeschichte der Haussduge- 
thiere”’ to the fact that in the cat the corpora cayernosa are largely transformed into 
a non-erectile fatty cushion. 
