ANATOMY OP THE HORSE, 
422 
MALE GENITAL REGION. 
cremaster .— (Ilio-testicularis.) 
Continued from the faschia superficialis abdominis upon the 
spermatic chord, and thence into the fibrous texture of the scro¬ 
tum is a thin, cellular, fibrous expansion ; and, underneath this, 
a layer of fleshy substance, which has, when contrasted with the 
surrounding white parts, a remarkably red aspect. This is the 
cremaster. Superiorly, at the internal ring, it has a tendinous 
origin from the internal oblique and transverse muscles ; from 
which its fibres pass obliquely backward upon the chord, become 
reflected along with it through the external ring, and terminate, 
slantwise, in a digitated margin, just before the chord joins the 
testicle. From its digitations, several slender flattened tendons 
descend and expand upon the inferior surface of the tunica vagi¬ 
nalis, with the substance of which they become so interlaced and 
intermixed, that all further trace of them becomes lost. 
Action .—To retract the testicle (it has the power of withdraw¬ 
ing it as high as the abdominal ring), and to aid in its suspension. 
erector penis.— (Ischio-sub-pejiialis.) 
Situation .—Upon the ramus ischii, and crus of the corpus 
cavernosum. 
Figure .—Short, thick, conoid. 
Attachment .—Inferiorly, to the inner side of the infero-posterior 
part of the tuberosity of the ischium; superiorly, to the crus penis, 
enveloping a considerable portion of it. 
Relations .—On the outer side, with the flexors of the thigh ; 
on the inner side, with the accelerator urinse: internally, with 
the corpus cavernosum. 
Direction .—Oblique; from above, downwards; and from with¬ 
out, inwards. 
Structure .—Tendinous and fleshy at its ischial attachments ; 
fleshy in other parts, excepting that its surfaces are in part apo¬ 
neurotic. 
Action .—To promote the influx of blood into the penis at the 
time of erection by elevating and protruding the organ, and to 
aid in retaining it in the state of erection. 
TRIANGULARIS PENIS.- (Isck io-Ure til )'UVlS . ) 
Situation .—Across the floor of the cavity of the pelvis, in front 
of the ischial arch. 
Figure ,—' Thin and expanded. 
