SNAKES. 173 



9. DlPSAS GLOBICEPS. 



Fischer, I. c. p. 89. t. 3. f. 6. 



Scales in twenty-three rows ; two anterior oculars ; the hinder 

 edges of the occipital shields forming nearly a straight line ; anal 

 bifid. Greyish brown, on each side a row of large black spots 

 with white centre. Liberia. 



10. DlPSAS FASCIATA. 



Fischer, I. c. p. 84. t. 3. f. 5 (ante-orbital should not be divided). 



Scales in twenty-three rows ; one anterior ocular ; eight tem- 

 poral shields. Greyish ; two temple-streaks ; on each side a 

 row of blackish-brown perpendicular cross streaks, extending on 

 the belly. W. Africa. 



11. DlPSAS PULVERULENTA. 



Fischer, I. c. p. 81. t. 3. f. 1. 



Body and tail very slender, much compressed; head very 

 distinct from neck. Scales in nineteen rows ; anal entire. Brown : 

 on each side a series of numerous dark brown erect transverse 

 streaks, some pairs confluent, forming cross bands ; beneath with 

 two punctulated longitudinal lines, extending to the tip of tail ; 

 head uniform brownish. 



a. Old Calabar. Presented by W. Logan, Esq. 



b. Old Calabar. Presented by W. Logan, Esq. 



Description. — Body and tail slender, much compressed ; head 

 voluminous, very distinct from neck ; eye large, pupil subellip- 

 tical ; rostral shield moderate, just reaching the surface of snout ; 

 frontals moderate ; vertical very broad, nearly reaching the outer 

 edge of crown, with convergent sides and an obtuse angle behind, 

 rather longer than broad ; occipitals moderate, rather broad and 

 truncated behind, not forked; superciliary forming a triangle 

 with the base above the eye ; posterior oculars two, anterior one, 

 just reaching the surface of crown ; loreal square, nasals short ; 

 eight narrow upper labials, third, fourth and fifth forming the 

 lower edge of eye ; two pairs of elongate temporal shields, front 

 pair in contact with both oculars. Scales smooth, in nineteen 

 rows ; those of the vertebral series largest ; of the first and 

 second, of the seventh, eighth and ninth broad, rhombic ; of the 

 intermediate fines much imbricate, narrow, lanceolate; anal entire, 

 subcaudals two-rowed. Two posterior maxillary teeth longest, 

 channeled, remainder equal. Brown with a strong cast of purple ; 

 each side with sixty-eight elliptical erect brown transverse streaks, 

 sometimes the pairs confluent on the back, streaks in the middle 



