70 CEBUS 



GATUS E. Geoff. ; C. cucullatus Spix, = C. variegatus E. 

 Geoff.; C. chrysopus F. Guv.; G. fatuellus (Linn.); G. 

 CIRRIFER, Humb. ; C. lunatus Kuhl, = G. frontatus Kuhl ; C. 

 cristatus F. Guv., = G. cirrifer Geoffroy. 

 Then he states that the variation existing among the species of 

 Gebus is so extreme that it is practically impossible to designate 

 the species, then reviews those given in his list, compares some 

 with others, and gives the coloring of the pelage. 

 1840. R. P. Lesson, Species des Mammiferes Bimanes et Quadru- 

 manes. 



The species of Gebus in this work are arranged in groups 

 according to the way the hair is disposed on the head whether 

 in horns in front upright, or the hair lying flat, or lengthened. 

 The recognized forms are G. cirrifer juv. ; G. fatuellus ; C. 

 huffoni = G. fatuellus ; C. robustus = C. variegatus ; C. 

 cucullatus Spix, = G. variegatus; G. frontatus; Sajou 

 trembleur = 6". trepida? Linn., undeterminable; G. apella; G. 

 CAPUciNUS var. A. B. ; Le Cat = G. azaice; var. G. G. capu- 

 ciNA ; var. D. C. gracilis = C. albifrons ; var. E. C. xantho- 

 cephalus = G. v.\riegatus; var. F. G. libidinosus; C. hypo- 

 leucus = C. CAPUCINUS ; C. monachus — G. variegatus ; var. 

 A. C. xanthosternos = G. variegatus ; G. chrysopus ; G. albi- 

 frons ; C. brissoni = C. flavus ; var. A. G. unicolor Spix ; 

 var. B. C. fulvus D'Orb., = G. unicolor; var. albine C. albus, 

 albino. 



1844. Tscliudi, Fauna Peruana. 



Four species recorded: C. robustus (nee Kuhl), undeterminable, 

 possibly = G. macrocephalus Spix ; C. capucinus undetermin- 

 able; G. albifrons (Humb.) ; and G. chrysopus Guv. 



1845. Pucheran, in Revue et Magasin de Zoologie. 



G. albifrons Humb., redescribed as C. versicolor. 



1847. Wagner, Konigliche bayerische Akademie der IVissenschaften. 

 Abhandlungen der mathematisch-physikalischcn Classe. 

 Gebus apella (Linn.), redescribed as Cebus nigrivittatus. 



1848. Sir R. Schomburgk, Reisen in British Guiana in den Jahren 

 1840-44 Sdugethiere. 



G. apella (Linn.), redescribed as C. olivaceus. 

 1851. /. Geoffroy St. Hilaire, Catalogue des Primates. 



Fourteen species of Gebus are here recorded : G. apella 

 (Linn.), (specimen ex Guiana), but with this another species 

 is confounded and united, the G f.^tuellus (Linn.), and he 



