170 OX THE MALE GENERATIVE ORGANS 



R fP- B - As * oc - 32. ON A LITTLE-KNOWN CRANIAL DIFFERENCE 



1881, p. 718. 



BETWEEN THE CATARRHINE AND PLATYR- 

 RHINE MONKEYS.* 



BESIDES the well-known difference in the dentition, and in the form of 

 the external auditory meatus, in the monkeys of the old and new worlds, 

 there is a difference in the formation of the bony walls of the temporal 

 fossa which in nearly every case suffices to distinguish at once the skull 

 of a member of one of these groups from that of one of the other. As 

 independently discovered by the author (P. Z. S. 1880, p. 639) and Dr. 

 Gustav Joseph (' Morphologisches Jahrbuch,' i. pp. 453-465), in the 

 Platyrrhine monkeys the parietal bone is prolonged forwards to meet the 

 malar, there being a well-marked suture usually between the two, the 

 frontal being in consequence altogether excluded, superficially at least, 

 from articulating with the squamosal and alisphenoid. In the Catarrhine 

 monkeys, on the other hand, as also in man, the parietal does not reach 

 the malar, there being an isthmus between the two bones formed by the 

 articulation of the frontal with the alisphenoid. 



T.z.s.1881, 33. ON THE MALE GENERATIVE ORGANS OF THE 

 xi. p. 107. 



SUMATRAN RHINOCEROS (CERATORHINUS SU- 



MATRENSIS.^ 



ON two occasions the late Prof. Garrod had opportunities of dissecting 

 the Sumatran two-horned Rhinoceros ; and his notes on their anatomy 

 will be found duly recorded in the Society's publications J. Both his 

 specimens were females. 



On March 20, 1879, the Society received on approval a fully adult 

 male of this animal, being, I believe, the first individual of that sex 



* Rep. Brit. Assoc. 1881, p. 718. 



t Trans. Zool. Soc. vol. xi. pt. iv. pp. 107-109, PI. XX. (1881). Eead March 16th, 

 1880. 



Prof. Garrod had the drawings which accompany this paper made by Mr. Smit 

 from the animal whilst still fresh, with the object of laying some notes on the subject 

 before the Society. Unfortunately I have been unable to find any such amongst his 

 numerous MS. papers. He also requested me to make notes and measurements of the 

 male organs for him with the like object; and from these sources I have drawn up the 

 present paper. The glans penis is now preserved in the College of Surgeons. 



t Proc. Zool. Soc. 1873, p. 92, and Trans. Zool. Soc. x. p. 411 (1878). 



