2<) CEBIDvE. SIAMIRIS. 



The Reed Tee-Tee. Callithrix donacophilus. 

 *«, b, c. Skulls. Bolivia. From Mr. Bridges' Collection. 



The White-handed Tee-Tee. Callithrix moloch. 

 a. Skull. Brazils. 



The Black-handed Tee-Tee. Callithrix melanochir. 



a. Skeleton. From Mr. Brandt's Collection. 



The Collared Tee-Tee. Callithrix torquatus. 



Callithrix amictus, Spix, Sim. Bras. pi. 38. fig. 1 (skull). 



*a. Skull. S. America. From Mr. Stevens's Collection. 



The Copper Tee-Tee. Callithrix cupreus. 

 <S)j(>, Sim. Bras. pi. 38. fig. 3 (skull). 



The Black-fronted Tee-Tee. CaLlithrix nigrifrons. 

 Spix, Sim. Bras. pi. 38. fig. 1 (skull). 



SIAMIRIS. 



Teeth : — Incisors ~ ; Canines ~ ; Premolars ~ ; Molars |=jj ;=36. 



The Bolivian Tee-Tee. Siamiris entomophagus. 



Chenu, Encyclop. d'Hist. Nat. p. 216. fig. 177 (skull). 

 Chrysothrix entomophagus, Tf Orbigny, Voy. ix. pi. 4 (skull). 



*«, b. Bolivia. From Mr. Bridges' Collection. 

 c. Voyage of H.M.S. Herald. Presented by Capt. Kellett and Lieut. 

 Wood. 



The Tee-tee. Siamiris sciureus. 



Simia? sciurete, Spix, Cephalogenesis, tab. 6. figs. 8-11 (skull), 1815. 

 Cebus sciureus, Biainv., Ost. Atl. G. Cebus, pi. 6 (skull). 



Cervical vertebras 7 



Dorsal 13 



Lumbar 7 



Sacral 3 



Caudal 27 



*«. Skull. Para. Presented by R. Graham, Esq. 



b. Skeleton. From the Zoological Society's Collection. 



c. Skull. Para. Presented by J. P. G. Smith, Esq. 



d. Skull. District of Quito. From Mr. Stevens's Collection. 



