REPORT ON THE NUDIBRANCHIATA. 
115 
videcl with, numerous longitudinal folds (fig. 6), which are not continuous with those of the 
stomach. The stomach 1 is large, free, and consists of an anterior narrower and a pos- 
terior somewhat wider portion; the former is about 3 *2 cm. long, by 2'4 cm. broad and 
1*5 cm. high; the latter about 5'2 cm. long, by 4*5 cm. broad and 3 cm. in height; the 
former is reddish-grey on the outside, the latter greenish-grey with a nacreous lustre, it 
is provided with numerous muscular bands; the interior of nearly the whole organ is 
blackish-violet in colour, and has numerous strong longitudinal folds ; the posterior end 
is smooth and greenish-grey in colour ; at the posterior end above is the aperture of the 
bile duct. The wall of the stomach is 3-3*5 mm. thick, that of the intestine 2-*5 mm. 
The intestine is strong and long (20 cm.); its diameter is everywhere about 10-12 mm.; 
it arises from the fore-end of the stomach, and takes the usual course to the anus ; its 
interior is nearly smooth; with only a few folds which increase in thickness in the 
rectum. — The whole alimentary tract was completely empty, with the exception of the 
intestine, which contained a softish dark violet mass, made up of indistinguishable animal 
remains with a large (2 *7 cm. long) pyriform body, possibly an animal allied to Actinia. 
The liver was apparently about the same size as the stomach, and had a large cavity ; 
the interior was of a brownish-black, the exterior of a dirty-grey, colour. 
The 'pericardium is very large. The atrium of the heart broad and large ; the ven- 
tricle has a length of 26 mm., a breadth of about 42 mm.; there is a thin-walled dilatation 
along its left margin ; the atrio-ventricular valves are strong and about 4 mm. broad ; 
the orifice of the aorta is unprovided with valves. The blood glands are of a ye lowish- 
white colour, faintly tinged with green ; they lie obliquely on each side of and above 
the pharynx, the left hand one being slightly in advance of the other ; the left hand gland 
has a length of about 27 mm., with a breadth of 18 mm. and a thickness of 10 mm; 
the right hand gland a length of 35 mm., a breadth of 32 mm., and a thickness of 6 mm. 
The renal syrinx is of a reddish-brown colour, pyriform in shape, and about 1 cm. 
long, with the usual folds on the inside ; its pericardial orifice has a diameter of about 
1*5 mm. The free part of the ureter is 4 cm. long, and is provided with folds and 
papillary outgrowths on the inside (PI. XIII. fig. 25) ; that portion of the duct which lies 
within the body-wall, ending in the renal pore, is about 2 cm. long. On the peritoneum 
is a dense ramification of renal tubules (PI. XII. fig. 20). On the surface of the liver 
there seemed to be a large and beautiful feather-like organ, which must be regarded as the 
kidney and the urinary chamber. 
The hermaphrodite gland (PI. XI Y. fig. 11) was quite free, and lay, as it seemed, 
between the liver and the anterior genital mass, forming an irregular parallelogram - 
shaped organ, its length was 3*3 cm., with a breadth of 2*3-3 cm. and a height of about 
1 There were two large openings on the back, possibly produced by the distension on bringing the animal up to the 
surface from the great depth at which it lived. Unfortunately both the stomach and liver were here ruptured, and 
their connection broken, hence I am unable to make any positive statements concerning the relations of these organs 
and the exact situation of the hermaphrodite gland and renal chamber. 
