149. BIPSADOBOA. 81 



The descriptions of the two following Snakes are insuffioient, and 

 as the dentition does not appear to have been examined, it is even 

 doubtful whether they belong to the genua DipsadomorpTms as here 

 defined : — 



DiPSAs BEETHoiDi, Jan, Elenco, p. 103 (1863), and Ipon. Gen. 38, 

 pi. V. fig. 8 (1871). 



Eostral broader than deqj ; internasals shorter than the prse- 

 frontals; frontal once and one fourth as long as broad, a little 

 longer than its distance from the end of the snout, shorter than the 

 parietals ; loreal as long as deep ; one prseocular, not reaching the 

 frontal; three postoculars ; temporals 2+2; eight upper labials, 

 fourth and fifth entering the eye ; five lower labials in contact with 

 the anterior chin-shields. Body strongly compressed. Scales in 

 15 rows, vertebrals enlarged. Above with dark spots forming 

 interrupted cross-bands; two dark lines running along the beUy 

 and tail. 



Habitat unknown. — Prof. Ehlers informs me the specimen is no 

 longer to be found in the Gottingen Museum. 



DiPSAS oEK-AiA, Macleay, Proc. Linn. Soc. IS". 8. W. (2) iii. 1888, 

 p. 416. 



Head broad, flat, rounded at the muzzle, and very suddenly con- 

 tracted behind into a very narrow neck. Body elongate, compressed, 

 and tapering to a very long fine taU. Loreal nearly square ; a 

 large prseocular ; two small postoculars ; nine upper labials. Scales 

 in 15 rows. Ventrals 277 ; anal entire ; suboaudals 120. Yellowish- 

 white, closely barred with black. 



Total length 610 millim. ; tail 230. 



King's Sound, N.W. Australia. 



149. DIPSADOBOA. 



Dipsadoboa, part., Gilnth. Cat. Col. Sn, p. 182 (1858). 

 Heterurus, part., Jan, JElenco sist. Ofid. p. 103 (1863). 

 Anoplodipsas, Peters, Mon. Berl. Ac. 1869, p. 442. 



Maxillary teeth 16 to 18, followed, after a short interspace, by a 

 pair of enlarged grooved fangs situated below the posterior border 

 of the eye ; anterior mandibular teeth feebly enlarged. Head 

 distinct from neck ; eye rather large, with vertically elliptic pupil ; 

 nasals concave. Body compressed ; scales smooth, with apical pits, 

 disposed slightly obliquely, in 17 rows, the vertebral row enlarged > 

 ventrals rounded. Tail moderate ; subcaudals single. 



West Africa. 



1. Dipsadoboa unicolor. 



Dipsadoboa unicolor, Qunth. Cat. p. 183 (1858), and Zool. Sea. 1872, 

 p. 75. 

 VOL. m. 



