•244 MESSRS. HANCOCK AND EMBLETON ON THE ANATOMY OF DORIS. 
trunks passing from the skin to the auricle ; n, efferent or branchio-cardiac 
vein ; 0 , portal heart lying below pericardium, and seen through it ; 
upper wall of renal organ, exhibiting, by the aid of injection, a fine 
network of arterial twigs in connection with the aorta; q, a gland-like 
body in connection with the vascular system, and overlying the cerebral 
ganglia ; r, branchial plumes. 
Fig. 2. Dorsal view of viscera of Doris hilamellata. a, buccal mass ; h, buccal giz* 
zard ; c, portion of salivary gland ; d, upper aspect of stomach ; e, pancreas ; 
/' intestine ; g,g, liver; h, mucus-gland of female organs ; spermatheca; 
j,j, testis ; h, pericardium ; /, ventricle ; m, auricle ; n,n, lateral vein from 
skin, entering auricle ; o, portal heart ; p,p, upper wall of renal organ, ex- 
hibiting a fine arterial network ; q, branchial plumes ; r, gland-like organ 
in connection with vascular system. 
Fig. 3. Dorsal view of viscera of Doris repanda, the heart having been removed. 
a, buccal mass ; b, upper aspect of stomach ; c, pancreas ; d, d, intestine ; 
e,e, liver ; f,f, renal organ, exhibiting a symmetrical arrangement of arte- 
rial twigs on its upper wall ; g, aorta with apex of ventricle attached ; 
h, portal heart appearing through the upper wall of renal organ; i, branchiae; 
j, generative organs ; h, glandular organ in connection with aorta, over- 
lying supra-oesophageal ganglia, from which nerves may be seen to radiate. 
Fig. 4. Dorsal view of viscera of D. tuherculata. a, buccal mass ; h, stomach, upon 
which part of the gastric plexus of sympathetic nervous system is visible; 
c, intestine ; d, d, liver with the principal arterial trunks of the renal organ 
seen on the surface ; e, retracted penis \f, mucus-gland of female channel ; 
g, spermatheca ; h, vagina, leading to same from external orifice ; i, peri- 
cardium ; j, ventricle ; k, auricle ; I, I, lateral trunk veins from skin to 
auricle ; m, efferent or branchio-cardiac vein ; n, portal heart seen through 
the transparent membranes of heart; o, branchial plumes; p, glandular 
organ in connection with vascular system ; q, supra-oesophageal ganglia 
with numerous nerves radiating from them ; r, branchial ganglia of sym- 
pathetic system ; s, retractor muscles of channel of mouth. 
PLATE XII. 
Fig. 1. General view of viscera partially separated, arterial system injected, D. tuher- 
culata. a, buccal mass ; h, muscles for retracting channel of mouth ; 
c, oesophagus ; d, salivary glands ; e, stomach ; f, pancreas ; g, hepatic 
duct ; h, liver ; i, i, intestine ; j, anus ; k, renal orifice, with a bristle passed 
through into renal cavity; /, renal organ having the hepatic arteries im- 
bedded in its superior wall ; m, portal heart, partially contained within 
renal organ ; n, apex of ventricle, the heart having been removed ; o, re- 
