Parxer.—Anatomy and Embryology of Seymnus lichia. 233 
the posterior border of the pectoral : it receives the blood from both pectoral 
and pelvic fins, but is without important feeders in the intermediate part 
of its course; and, lastly, it is fully established as a fairly early embryo of 
Scymnus. All these facts tend to support the theory that the lateral vein 
represents the veins of the primitive vertebrate lateral fins, and is therefore 
a structure of considerable renep Oe interest. 
EXPLANATION OF PLATES XXXI. AND XXXII. 
Fig. 1. pesi of Scymnus lichia, female, made is opening the body-cavity by a 
n ventral ineision ; intended to show the ptem disposition and pro- 
poros of the chief abdominal viscera gene 1 nat. siz 
ab. p, — ism , the two ibe of the liver turned 
b.e, bursa entia: forwards to show the other viscera. 
ed. E xoi of stomach.. 0. gl, priu gland, shown in do 
cl, c line As ugh the liver. 
f-t Dae tube. pn, abe 
Js era senta) apertureofFal- py. st, poi portion of stomach. 
lopian tubes. spl, splee 
g. h. o, gastro-hepatic omentum. u. ee tea papilla. 
int, intestine. , uterus. 
a) cloacal aperture of uterus. 
Fig. 2. The stomach and intestine from the ventral aspect (2 nat. size). a 
Fig. 3. The cipem. and intestine from the right side (2 nat. s . 
ze). 
In fig. 2 the bursa Entiana is opened, as well as a section of the intestine, so 
as to show the pylorie and spiral valves. 
a.m. a, anterior mesenteric des 
a. Sp. s anterior — ic vein 
b. e, ao 
b. d, bile 
cd. st, oe deus of stomach. 
ca. a, coeliac 
du. a, vires artery. 
du. v, duodenal vein. 
g.a, small left gastric artery. 
l. g. a, lieno-gastrie artery. 
l. g. v, lieno-gastrie vein. 
m.m. a, middle mesenterie artery. 
m.v, mesenteric vein 
p. m. a, posterior yutetulerio artery. 
pn, right, and 4 left lobe of pancreas 
p.v, cus E. 
PY, P. 
" a ped portion of stomach. 
ectum 
at nisl deae 
intestine. 
purae vertical section through body- i a little anterior to pelvic fin (nat. 
siz 
in, enun 
i. : lateral anre 
m, body muscles. 
p, peritoneum. 
eral v 
Transverse etal section of an embryo in the third stage, taken along the line 
ay in fig. 13. 
sgn section taken along z'y'. 
16. 
an. d, sreinep or segmental duet. 
g, genital ridge. 
int, intestine with spiral valve. 
. r, inter-renal body. 
s of ma (metanephros). 
pelvi 
r. gl, rectal uix 
