044 MR. G. A. BOULEXGEll OX TJIK 



1 . Pythox. 



Daud. Hi«t. Kept. v. p. 266 ; Bouleng. Cat. Sn. i. p. 85. 

 Two species : — 



Two upper labials pitted; 79-95 scales across thickest part of body; 



veiitrals 260-286; subcaudals 58-82 P.sehes. 



I'our iipjier labials pitted ; 53-63 scales across thickest part of body ; 



veiitrals 196-207 ; subcaudals 30-37 F.rec/ius. 



1. Pythox SEB^E. 



Coluber sebce Gniel. S. IS. i. p. ] 118. 

 Fython sebce Bouleng. t. c. p. 86. 



Ti'opical and South Africa, as far north as Senegambia and 

 the White Nile. 



2. Python regius. 



Boa regia Shaw, Zool. iii. p. 347, pi. xcvi. 



Fython regius Bouleng. t. c. p. 88. 



Senegambia to Nigei', eastwards to the Egyptian Soudan. 



2. Ehyx. 



])aud. Hist. Kept. vii. p. 251 ; Bouleng. Cat. Sn. i. p. 122. 

 Two species : — 



Tail ending in a conical scute ; scales in 47 to 53 rows, keeled on 



posterior part of body E, tJiehaicus. 



Tail ending in a curved, claw-like scute; scales in 41 to 45 rows, all 



smooth JE. muelleri. 



1. EiiYX THEBAicus lleuss, Mus. Senckenb. i. 1834, p. 134; 

 Bovileng. t. c. p. 125. 



Upper Egypt to German East Africa,. 



2. Eryx muelleri. 



Gongylophis imtelleri Bouleng. Ann. ct Mag. N. H. (6) ix. 1892, 

 p. 74. 



Eryx muelleri Bouleng. Cat. Su. i. p. 128, pi. v. fig. 2. 

 Egyptian Soudan, Mauritania, N. Nigeria, Togoland. 



Eaniily CoLUERiUiE. 

 Three parallel series : — 



No poison-fangs ; all the teeth solid A. Aglypha. 



Poison-fangs behind B. Opisthoglypha. 



Poison-fangs in front : C. Proteroglypha. 



A. Aglypha. 



I. Nostril between two nasals, or between two nasals and tlie inteniasal; loreal 

 present. 



A. At least one upper labial bordering the eye. 



1. Pupil round; scales in 19 or 21 rows; no subocular ; a single anterior 

 temporal. 

 Scales^ in_19 rows; venlrals 131-150; anal divided; subcaudals 



^°~95 Ti'opidonotus. 



