1922.] ** Renal Portal ’’ System. 181 
well under, it is stretched vt dorsal side upwards in a large dish with a 
cork or wax bottom means of cords attached anteriorly to one or two 
sa of the arms and secs pea to one or two of the digits of the hind 
limbs (thus es pani little = coer ems in the limbs). The poe 
ebrum and o 
of the cere optic lobe then quickly removed (the 
longitudinal ec sepals ¢ veins “ytog! ‘underneath the 7 Fagor aca 
not be cut, since loss of blo od fro every 8 t t be avoided, low 
P 
being ligatured. Next the urostyle is cut through and raised so that the 
muscular body wall can be cut along _ side of the vertebral column 
ed apts 
(external to the Phe cant: a ow All the seiner bar veins 
(varying from two to fi mber his species) and small arteries 
ome shee the dana: ‘iias of the aor ite (all visible ae the vertebral 
olumn ise en liga ec n the distal side of the 
lig pe xt the vertebral column is cut through at about the second 
Or genet sri ay and rem from here to the urostyle (thus effecting 
the extirpation of the nce hearts which Cushny (17) considers so 
desirable), with the u Loh parts of the ilia (beware of small branches of 
the iliac arteries) and the po ortions of muscular body wall at the sides of 
the body. The stump of the vertebral column I tied to both sides of t 
dissecting dish to prevent oo movements. The kidneys, the two 
d con u 
ear its opening into the rand to its attachment to the kidney, 
ss it, rapelton’ the iliac artery of that side and allow its extrem nity to rest 
inside the edge of a glass collecting ny supported in a convenient posi- 
i t rti 
no need whate a to serted 
the ureter—the urine flows quite gr so long as the ureter is not 
damaged in any way: at the same time it is mehr wai to watch the ureter 
when secretion has lis oe in order to remed obstruction which 
‘om 
of th 
wo pairs of awls connected with ee stretched across Pi vaieat 
lid wall under and anterior to the kidneys, and over the cut ends of 
