INNOCUOUS SERPENTS. 161 



white, speckled with brown, and relieved by a row of large 

 spots of a reddish brown, bordered with black. Inhabits 

 Brazil. 



12. DipsAS Catesbyi. Has much similarity to the 

 preceding ; but its form is much less elongated ; its 

 muzzle is more broad, and truncated at the end ; the gular 

 plates are much developed ; those of the head considerably 

 wider ; its scales are larger ; the spots on the trunk are 

 more extensive, and we may observe a collar and band of 

 a light colour between the nostrils. S. 162 + 82. From 

 Guvana. 



13. DiPSAS PAVONINA. Intermediate between the two 

 last, in almost every respect. Head as in D. Catesbyi ; 

 but the tail is longer, and furnished with 134 plates or 

 scuta; abdominal plates 217. Ground tint not verging 

 to red ; spots all oval. Appears with the last to repre- 

 sent the D. Weigeli at Guyana. 



14. DipsAs BucEPHALA. Said to come from Sumatra. 

 Very recognisable by its very deep trunk ; by its small, 

 but very broad, thick head, and by its extremely short 

 muzzle ; by the size of its dorsal plates ; by the abdo- 

 minal plates which advance just below the chin, &lc. The 

 plates of the head are very aggregated, and the frenals are 

 absolutely wanting. Point of the lower jaw bent up- 

 wards. S. 200 + 105. Above of a reddish-brown, re- 

 lieved by numerous wide transverse bands of reddish-yel- 

 low, varied with brown. 



15. DipsAs DiEPERiNKii. Of middle size. Trunk 

 high, more thick tovv^ards the head, which is proportion- 

 ably larger than in any other species ; 2 1 rows of scales 

 feebly carinated ; abdomen a little angular ; pupil of 

 the eye round ; teeth of equal length ; tail lengthened 

 and slender ; above clear brown, with angular markings ; 

 below verging on yellow ; a fine line behind the eye. S. 

 224+ 150. From Surinam, where it is among tiie rarer 

 species. 



16. DipsAs Boa. A curious and odd species, re- 

 markable for the smallness of the plates on the top of the 

 head, which are raised and convex ; for its very short 

 muzzle, which is narrow and conical ; for the presence 



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