76 ALLEN ° 
in size as these organs increase in size toward the breeding 
season, which is in January at Monterey Bay. In the female 
these vessels branch before reaching the ovaries and these 
branches spread out over the outer and inner surfaces of the 
ovaries; while in the male these branches penetrate directly 
into the testes. No common spermatic artery is formed in 
either male or female by the anastomosis of these branches, to 
pass between and parallel with the reproductive organs, as is 
the case with the veins. The anterior spermatic artery (PI. I, 
figs. 1 and 10; Sper.A.,) arises from the ventral surface of the 
aorta and passing obliquely ventrad across the left side of the 
kidney, gives off 3 or 2 renal arteries for the kidney and an 
intercostal artery, which passes ventrad between the 2 adjacent 
myotomes; the main spermatic trunk also continues ventrad 
to break up on the anterior surface of the ovaries or to pene- 
trate the testes. The second spermatic artery (P1. I, figs. 1 and 
10; Sper.A.,) is given off from the aorta, about the distance 
of 2 vertebree from the first spermatic artery, and in like manner 
sends off renal and intercostal arteries for the kidney and body- 
wall; while the main trunk supplies the middle portion of the 
ovaries or testes. The ¢hzrd or posterior spermatic artery (Pl. 
I, figs. 1 and 10; Sper.A.,) is much the largest; in addition to 
supplying the ordinary renal and intercostal arteries, it gives off 
from 1 to 3 suprarenal arteries (Pl. 1, figs. 1 and 10; Sr.A.) 
for that gland. In fig. 1 the third spermatic artery passed in 
front of the gland and only one artery was observed to enter 
the gland; while in fig. 10 the main artery passed behind the 
gland and at least 3 arteries were seen to penetrate it. In the 
specimen from which fig. 1 was drawn the fostertor mesenteric 
artery (fig. 1; P.Mes.A.) arises from the last spermatic artery, 
passing behind the posterior mesenteric vein, it continues ven- 
trad with it between the ovaries to supply the rectum and anas- 
tomoses with intestinal artery,,); while in the specimen from 
which fig. 10 was drawn the posterior mesenteric artery was 
given off much further dorsad and at first entered the kidney as 
a renal artery; then passing ventrad between the testes with the 
corresponding vein, supplied the rectum, but did not anastomose 
with intestinal artery,,); while in still other specimens the pos- 
