RENAL ORGAN IN THE NUDIBRANCHIATE MOLLUSCA. 521 
running in the wall of the branches; n, aorta; o, hepatic artery; p, openings of small branches 
of the renal chamber that penetrate the liver; g, hepatico-branchial vein ; 7, external orifice of 
the renal chamber; s, anal nipple; 7, intestine; v, liver. 
Prate LIV. 
Fig. 1. General view of the viscera of Doris tuberculata, the dorsal skin having been laid open so as to 
exhibit the pericardium: a, the so-called pericardium laid open; ياه‎ dorsal wall of ditto; 
b, ventricle; c, auricle; d, pyriform vesicle seen through the floor of the pericardium ; e, orifice 
of the vesicle leading into ditto; j, renal chamber seen through the floor of ditto; k, k, right 
and left branch of the anterior bifurcation of the renal chamber; /, lateral branches of ditto; 
m, arteries running in the dorsal wall of the branches; n, aorta; ¢, intestine; u, liver; v, sto- 
mach; w, buccal organ; «, reproductive organs; y, gland connected with the vascular system ; 
z, cerebral ganglia. 
Fig. 2. Dorsal view of the liver-mass of the same, showing the renal chamber proper laid open, the peri- 
l cardium and heart having been removed: d, pyriform vesicle; e, orifice of ditto, leading into 
the pericardium ; a shred of the floor of the pericardium is attached round the orifice ; ^, tubular 
prolongation of the vesicle; i, orifice of ditto, leading into the renal chamber ; 7, renal chamber; 
J' J', dorsal wall of ditto, laid open; k, anterior bifurcation of ditto; //, lateral branches of 
ditto; mm, arteries running in the dorsal wall of the branches; x, aorta; p, openings of small 
branches that penetrate the liver; رو‎ hepatico-branchial vein, covered with glandular matter, 
and receiving numerous branches on each side ; 7, external orifice of the renal chamber; s, anal 
nipple; 77, intestine cut through; v, liver; v, stomach; w, reproductive organs; رت‎ branchial 
lumes. 
Fig. 3. Renal chamber of Doris pilosa, laid open from above: d, pyriform vesicle, with a fragment of the 
pericardial floor attached to the broad end ; e, orifice of the vesicle leading into the pericardium ; 
i’, orifice at the apex of the vesicle leading into the renal chamber ; j, renal chamber proper, laid 
open ; J'j', dorsal wall of ditto turned back; g, hepatico-branchial vein ; ^, external orifice of 
0 the renal chamber; s, anal nipple; f, intestine; u, liver; v, branchial plumes. 
| Fig. 4. Dorsal view of the viscera of Pleurobranchus*, with the renal chamber laid open: a, the so- 
4 a ncc uud 
called pericardium; a", floor of ditto; 5, ventricle turned back, the aorta having been cut 
through; c, auricle; d, pyriform vesicle lying below, and opening through, the floor of the 
pericardium ; A, tubular prolongation of the vesicle; i, orifice of the prolongation, opening into 
the renal chamber; j, renal chamber; jj’, dorsal wall of ditto, laid open; 7, enlargement at 
the root of the aorta; wu, liver-mass; v, salivary gland, with the posterior portion turned 
forward to expose the liver-mass ; w, gland in connexion with the blood-system ; 2, cerebral 
ganglia. 
Fig. 5. Pyriform vesicle of Tritonia Hombergii, laid open: e, orifice leading into pericardium ; و‎ lami- 
nated plicze; g, glandular appendages of the tubular prolongation. 
Fig. 6, One of the laminated plicze, removed, and much magnified: v, extremity attached to the margin 
of the orifice; w, vibratile cilia; v, a portion of the ciliated epithelium turned over to show the 
base of the cells from which the cilia arise. 
Fig. 7. A much magnified portion of the glandular appendages from the tubular prolongation of the 
vesicle, 
Fig. 8. A few of the granular cells from ditto, highly magnified. 
* The species dissected was brought from Madras by Mr. Elliot, to whom we are indebted for so many interesting 
Nudibranchs. It is about an inch and a half long, of a roundish form, and of a delicate yellowish-white colour, with 
the upper surface reticulated with dark brown. - It is probably undescribed. 
3x2 
