144 Dr. J. B. S. Jackson's Dissections of a 
overlap, the intervening mucous membrane being traversed 
longitudinally by very numerous fine lines. Along the first 
few feet of the intestine the surface was generally smooth, but 
there were a number of folds of mucous membrane which 
might properly be called valvulee conniventes, not being con- 
tinued entirely across the intestine ; these were about one inch 
apart, and į inch in width midway. About 40 feet from the 
termination of the intestine, the valves became smaller and 
more irregular, and soon the mucous surface assumed a very 
peculiar appearance, the change, however, being gradual ; the 
portion opposite the mesentery continued thin and nearly or 
quite smooth, whilst the remainder, consisting of one half or 
two-thirds of the whole intestine, was extremely thick and 
rugous, the rugs being very broad and mostly transverse, 
though many were longitudinal; no mucous follicles were seen 
here, nor indeed in any part of the intestine, except a few very 
small ones in the rectum, and yet it was impossible not to 
regard this as a glandular structure, analogous, perhaps, to the 
Peyerian ; the mucous membrane throughout the last 20 or 35 
feet was smooth. Finally the rectum opened in the sulcus 
which gave outlet to the vagina. 2 
The liver was a broad, flat, very regular organ, divided into 
two lobes, of which the left was decidedly the largest, differing 
therein from each of the other specimens, and from what 
been generally observed in the cetaceans; the right measured 
24 inches in length, the left 25, and the whole organ trans 
versely 34 inches; thickness 2 inches; no trace of a third 
lobe. Color and structure not remarkable.  Gall-bladder 
wanting, as usual, in the cetaceans; duct, near the liver as 
reticulated upon the inner surface, and measured li inches — 
transversely. 
The spleen was a soft, dark red organ, somewhat lobulated, 
of a flattened, oval form, and about 10 inches in length ; also r 
a second, about an inch in diameter, and connected with the 2 
first by cellular membrane ; several of these are | P od 
found in the cetacea, and I am not sure that there were no 
others in the present case. 
