CHAP. IV] THE GENERAL ANATOMY OF THE TARSII 119 



provide connecting gradations between the two types. Where con- 

 trasts exist, as in (c) (d) and (/), the higher type met with among 

 the true Apes is suggested. Indeed resemblances to the most 

 highly developed of these are not entirely absent. Yet it is not 

 necessary to assume that Tarsius occupies an elevated position on 

 this account, and it is preferable to regard it as a generalised 

 form, representative of ancestors which can be made known only 

 (if indeed at all) by the discovery of their fossilized remains. 



The Pancreas is placed obliquely, the left extremity being 

 lower than the head. 



The Duodenum (Figs. 70 and 71, No. 4) resembles that of the 

 Lemurs in position but is less prominent. The disposition of the 

 coils of the small intestine is shewn in the accompanying illustra- 

 tion. It will suffice to notice the comparative simplicity of this 

 part of the alimentary canal. 



The Caecum (Figs. 70 and 71, No. 17) is of very considerable 

 dimensions and no appendix is to be distinguished. The large 

 intestine consists of a short straight transverse colon and a rectum. 



The Spleen is placed between the diaphragm and the stomach, 

 having less extensive relations with the left kidney than is the 

 case in the Lemur. 



K. Urogenital Organs. The left kidney is placed more 

 caudally than the right. Into the pelvis of each kidney, four 

 pyramidal eminences (one far larger than the rest) were seen (by 

 Burmeister) to project. The right suprarenal body is placed high 

 up behind the liver, and in a specimen of Tarsius dissected by me 

 it was supplemented by a small accessory suprarenal body placed 

 in front of the hilum of the right kidney. The left suprarenal 

 was not at the upper pole of the kidney and did not appear above 

 the upper border of the pancreas. The testes are intra-abdominal 

 in a male Tarsius dissected by me. (They unfortunately yielded 

 no sperm-cells capable of separation for examination by Retzius' 

 method.) In the penis of Tarsius, the intercavernous septum does 

 not contain cartilage, but only fibrous tissue. This applies at least 

 to the anterior part, where the corpus spongiosum is not to be 

 recognized. The uterus is bicornuate (Burmeister), and the clitoris 

 terminates in a large glans clitoridis. In this respect Tarsius appears 

 to resemble the Lemuroidea. 



