ILLUSTRATIONS (6). NOCTURNAL ARE. 203 



for instance, the Limande (Plcuronectcs Limanda), which is 

 found as for inland as Orleans. Some forms of sea fish, as 

 the dolphin and skate (liaia), are met with in the great rivers 

 of both continents. The fresh-water dolphin of the Apure 

 and the Orinoco differs specifically from the Delphinus yange- 

 ticus as well as from all sea dolphins.* 



(6) p. 199. — " The striped nocturnal monkey." 



This is the Douroucouli or Cusi-cusi of the Cassiquiare 

 which I have elsewhere described as the Simla triviryata,\ 

 from a drawing made by myself of the living animal. We 

 have since seen the nocturnal monkey living in the mena- 

 gerie of the Jardin des Plantes at Paris.J Spix also met with 

 this remarkable little animal on the Amazon River and called 

 it Nyctipithecus vociferans. 



* See my Relation liistorique, t. ii. pp. 223, 239, 406-413. 

 + Recueil d 'Observations de Zoologie et dAnatomie comparie, t. i. 

 pp. 306-311, tab. xxviii. 

 % Op. cit., t. ii. p. 340. 



Potsdam, June 1849. 



