ON THE UAKARI MONKEYS. 105 



pomas of the Ohio and Alleghany have their only near relations in the 

 gigantic Sieboldias o north-east Asia, one species of these occurring in 

 Japan, the other being one of Pere David's discoveries in Moupin. 

 Similarly with the genus Polyodon amongst ganoids. Only two species 

 of this genus are at present known, P. folium, inhabiting the Mississippi, 

 P. (jladius, the Tang-tse-kiang. The recent discovery of at least two 

 species of Scaphirhynclius in Turkestan makes it probable that ere long 

 species of that Americo-Asian genus will be found in the Chinese rivers 

 as well. The parallelism in the case of the salamanders is particularly 

 interesting, when one remembers the celebrated Andrias scheuchzeri of 

 the (Eningen beds, and it tends to favour the view that at that time 

 practical identity in the forms of animals and plants reigned throughout 

 the northern temperate zone. W. A. FORBES, Cambridge, 14tfi February, 

 1879. 



P.S. The reported discovery ( 4 Nature,' vol. xix. p. 351) of a true 

 alligator in the Yang-tse-kiang, will, if confirmed, add a still more remark- 

 able case to those mentioned above. 



20. ON THE EXTERNAL CHARACTERS AND ANATOMY P.z.S.1880, 

 OF THE RED UAKARI MONKEY (BRACHYURUS p ' 627 ' 

 RUBICUNDUS) -, WITH REMARKS ON THE OTHER 

 SPECIES OF THAT GENUS.* 



(Plates IV.- VI.) 



ON May 24th, 1879, the Society purchased a female specimen of a red- 

 haired short-tailed American Monkey, which on its arrival was somewhat 

 doubtfully entered as an example of Bracliyurus rubicundus of Isidore 

 Geoffrey f. This animal lived in fair health till April 22nd last, when it 

 died without any premonitory symptoms. On dissection, both lungs and 

 liver, so frequently the seat of disease in Monkeys kept in captivity, were 

 found to be perfectly healthy ; indeed, with the exception of a little inflam- 

 mation of the stomach and small intestines, and a slight intussusception 

 of the transverse colon, no morbid appearances whatever were found. 



The death of this animal has enabled me to give that further notice of 

 it promised on its arrival (vide Mr. Sclater's monthly report, infra at.), 

 as well as to give some notes on its anatomy. For though, as might have 

 been expected, Bracliyurus differs in no essential respect from its allies, 

 the great rarity of Monkeys of this genus in captivity makes it advisable 

 to record any facts concerning the anatomy of its soft parts. In 



* Proe. Zool. Soc. 1880, pp. 627-6-47, Pis. LXI.-LXIIL Bead Nov. 30, 1880. 

 t P. Z S. 1871). p. 551. 



