30 REPTILES. 



9, Cystignathus senegalensis. 



Cystignathus senegalensis, Dum. 8f Bibr. p. 418 ; Smith, Hlmtr. of 

 S. Africa, t. 62. 



Head and body short and swollen, quite smooth ; tympanum 

 indistinct ; vomerine teeth in two small, obliquely ari^anged groups 

 on a level with the hinder edges of the inner nostrils ; tongue heart- 

 shaped. Greyish or yellowish, with three broad brown longitudinal 

 bands. South and West Africa. 



a. Adult male. South Africa. Presented by A. Smith, M.D. 



10. Cystignathus argyreivittis. 



Peters, Wiegm. Archiv. 1855, p. 55. 



Brownish black, with foiu" white dorsal bands ; joints of the 

 extremities white banded or spotted. Boror (Mozambique). 



11. Cystignathus georgianus. 



Cystignathus georgianus, Bibr. 3fSS. ; Dwn. S^- Bibr. p. 416 : Bell, 



Zool. of the Becif/le, Sept. p. 23. t. 16. f. 4. 

 Crinia georgiana, Tschudi, Batr. p. 78. 



Tympaniim indistinct ; vomerine teeth in two very small groups 

 behind the very small inner nostrils ; tongue oblong, entire behind ; 

 head moderately elongated ; toes quite free. Brown, with rose- 

 coloiu'ed spots, or with two broad rose-coloured latex'al bands. 



a-d. Half-grown and adiilt : not good state. Australia. Presented 



by Ch. Darwin, Esq. 

 e. Adult female. Australia. Presented by A. Giinther, M.D. 

 /, g. Adult. Port Essington. Presented by Dr. Fleming. 

 h. Adult. Port Essington. Presented by Dr. Fleming. 



Of the two following species we have only the original specimens, 

 upon which Professor Bell has founded his genus Borboroccetes, with 

 the species grai/ii and hlhronii : these have suffered so much, as not 

 to aUow me to give my own description of them. On the other hand, 

 neither the descriptions nor the figures given by Pi'of. Bell offer suffi- 

 cient characters for theii' separation as a different genus. I therefore 

 place them among the CystignatM, and refer to the descriptions of 

 the " Zoology of the Beagle.'' 



12. Cystignathus grayii. 



Borboroccetes grayii, Bell, I. c. Rept. p. 30, t. 17. f. 2. 



Vomerine teeth in two oblique series behind the inner nostrils ; 

 wrist without tubercle. 



a. Very bad state. Valdivia. Presented by Chax'les Darwin, Esq. 



