30 REPTILES. 



9. Cystignathus senegalensis. 



Cystignathiia senegalensis, Dum. S,- Bihr. p. 418 ; Smith, Ulusfr. of 

 S. Africa, t. (32. 



Head and body short and swollen, quite smooth ; tympanum 

 indistinct ; vomerine teeth in two small, obliquely arranged groups 

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

 shaped. Greyish or yeUo^vish, with thi'ee broad brown longitudinal 

 bands. South and West Africa. 



a. Adult male. South Africa. Pi'esented by A. Smith, M.D. 



10. Cystignathus argyreivittis. 



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



Brownish black, with four white dorsal bands ; joints of the 

 extremities M'hite banded or spotted. Boror (Mozambique). 



11. Cystignathus georgianus. 



Cystignathus georgianus, Bibr. MSS. ; Dum. cV Bihr. p. 416 ; Bell, 



^ Zool. of the Beadle, litpt. p. 23. t. 16. f. 4. 

 Crinia georgiana, Tschudi, Batr. p. 78. 



Tjnnpanum indistinct ; vomerine teeth in two very small groups 

 beliind the veiy small inner nostrils ; tongue oblong, entire behind ; 

 head moderately elongated ; toes qiute free. Bro-mi, with rose- 

 coloiu'cd spots, or ^^"ith two broad rose-coloured lateral bands. 



a-d. Half-grown and adult : not good state. AustraHa. Presented 



by Ch. Darmn, 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 follo^ving species we have only the original specimens, 

 upon which Professor Bell has founded his genus Borhoroecetes, with 

 the species grai/ii and hibronii : these have suftered so much, as not 

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

 neither the descriptions nor the figures given by Prof. Bell offer suffi- 

 cient characters for their separation as a (hfferent genus. I therefore 

 place them among the Ci/stignathi, and refer to the descriptions of 

 the " Zoology of the Beagle." 



12. Cystignathus grayii. 



Borborocoetes grani, Bell, I. r. Rept. p. 30. t. 17. f. 2. 



Vomerine teeth in two oblique series behind the inner nostrils ; 

 wrist without tubercle. 



a. Very bad state. Valdi\'ia. Presented by Charles Darwin, Esq. 



