472 ON THE ANATOMY OF TUPAIA. 
The kidneys are smooth, with a single calyx. The testes appear 
large proportionately, the particularly big epididymis alone descending 
into the rudimentary scrotum. The prostate is bilobed, Cowper’s 
glands being of fair size. The glans penis is elongately filiformly 
conical, and terminally a little blunted. 
The aortic arch divides as in man, giving off a right innominate, a 
left carotid, and a left subclavian. There are two independent 
Page 304. 
innominate veins, right and left. 
The lungs are deeply divided into three main lobes on each side, 
whilst on the right the extra azygos triangular lobe is also found, not 
so large as any of the others. 
Through the kindness of our President, I have had the opportunity 
of dissecting a female specimen of Tupaia tana, where there is a feebly 
developed sublingua, a less globose stomach, a lengthy thin-walled 
small intestine, no trace of a cecum, and a thick-walled large intestine 
3°25 inches long, quite easily distinguishable as such. The caudate 
lobe of the liver is much larger proportionately than in 7. belangert. 
In that there is no umbilical fissure, whilst that of the gall-bladder is 
very deep, the two species agree. 
Dr. Giinther has also permitted me to eviscerate a Bornean spe- 
cimen of Twpaia splendidula in the National Collection. Its liver is 
constructed on a plan identical with that of the two other species, the 
left lateral lobe being much the largest, the umbilical fissure nearly 
Fig. 1. 
Brain of Tupaia belangeri ; lateral aspect. 
obsolete, the cystic fissure deep, and the Spigelian lobe bifid. The 
caudate lobe, however, is long and narrow. The colon was very much 
distended, and with it the ceecum, so that the ileo-ceecal valve appeared to 
be situated at the side of the dilated colon, near to the blind extremity. 
If there had been no enlargement I should infer, from inspection, that 
the cecum is normally less than half an inch in length. 
The brain of Tupaia belangeri is smooth on its surface, and other- 
wise much resembles that of Solenodon,* Rhynchocyon, Petrodromus, 
* “Ueber die Siugethiergattung Solenodon,” pl. ii., “‘Abhandlungen der k. 
Akad. der Wiss. zu Berlin.” 
