RENAL ORGAN IN THE NUDIBRANCHIATE MOLLUSCA. 529 
branchial vein ; 7, external orifice of the renal chamber laid open; 7, intestine; w, liver; v, por- 
tion of the stomach. 
Fig. 3. Pyriform vesicle and prolongation laid open: d, vesicle; e, orifice of ditto leading into pericar- 
dium, with a shred of the pericardial floor attached ; f, laminated plice ; g, glandular dendritic 
appendages lining the interior of the prolongation; A, prolongation; j j, renal chamber, laid 
open; j’ j', dorsal wall of ditto, turned back. 
Fig. 4. Much-enlarged view of three of the dendritic tufts or processes from the interior of the tubular 
prolongation. 
PLATE LVII. 
Fig. 1. Dorsal view of the viscera of Bornella digitata, exhibiting the renal chamber undisturbed: a, the 
so-called pericardium, turned to one side; Û, c, ventricle and auricle seen through the floor of 
ditto; d, pyriform vesicle, opening through ditto, ditto; J j, renal chamber; k, anterior bifur- 
cation of ditto; 7 J, lateral branches of ditto; 7, external orifice of ditto; 7', tube leading from 
ditto to ditto; s, anal nipple; ¢, intestine; w, rudimentary liver, or central portion of the 
gastro-hepatic system ; vv, lateral branches of ditto supplying the dorsal papilla; v", branchlets 
of the renal organ ramifying over ditto; w, ovary; 2, salivary glands; y, buccal organ; رت‎ cere- 
bral ganglia. ` 
Fig. 2. Renal chamber of the same, removed, with the lateral branches spread out: d, pyriform vesicle, 
with a portion of the pericardial floor attached ; e, orifice of ditto, leading into the pericardium ; 
Jj j, renal chamber; k k, right and left branch of the anterior bifurcation of ditto; / J, lateral 
branches of ditto; 7, external orifice of ditto; »', tube leading from ditto to ditto; s, anal 
nipple. 
Fig. 3. Pyriform vesicle, more highly magnified: d, vesicle, with a shred of the pericardial floor adhering 
to the broad extremity ; e, orifice of ditto, leading into the pericardium ; 7, orifice at the oppo- 
site extremity of ditto, leading into the renal chamber ; j, renal chamber laid open; A, k, branches 
of the anterior bifurcation of ditto; J, lateral branches of ditto ; r, tube leading to the external 
orifice of ditto. 
Figs. 4 & 5. Much-enlarged views of two of the lateral branches of the renal chamber: v, root of the 
branch; w w w, enlarged cecal extremities of ditto. 
Fig. 6. The so-called pericardium, laid open: a’, dorsal wall of the pericardium; a", floor of ditto; 
b, ventricle; c, auricle; d, pyriform vesicle seen through the auricle and floor of the pericar- 
dium ; r, external orifice of the renal chamber; s, anal nipple. 
Prate LVIII 
Fig. 1. Dorsal view of the viscera of Scyllea marmorata, the heart and pericardium having been removed : 
€ € c, fragments of the auricle; d, pyriform vesicle; e, orifice of ditto leading into the peri- 
cardium ; j j, anterior and posterior branches of the renal chamber reduced to mere tubes, 
giving off numerous ramuscules to the various organs; the anterior extremity of the anterior 
branch is seen ramifying in front of the intestine; /', gastric and hepatic ramuscules ; I", large 
branch to the underside of the stomach ; 7", branches to the underside of the liver; /! الل‎ pn, 
ovarian ramuscules ; 7, external orifice of the renal chamber; 7’, tube leading to ditto; s, anal 
nipple; ¢ #, intestine, with a branch of the renal organ ramifying over it; uu, liver-masses ; 
v vv, ovarian masses; v’, oviduct; w, anterior stomach, or crop; y, reproductive organs; 
2, buccal organ; z’, cerebral ganglia. 
Fig. 2. Pericardium of the same, laid open: a’ a’, dorsal wall of the pericardium turned back ; a^ floor of 
ditto; Û, ventricle; c, auricle; d, pyriform vesicle, opening through the floor of the pericardium. 
