60 EEPTILES. 



scales : nostrils semilunar, superior, valvular, in the middle of a 

 nasal shield: eyes moderate, rather superior; pupil round: body 

 elongate, rather compressed, covered with small, polished, six-sided, 

 imbricate scales: belly compressed, stronj^^ly keeled : ventral shields 

 band-like, transverse ; sides folded together, with a central notch in 

 the middle of the hinder edge : tail strongly compressed, oblong, co- 

 vered wath a series of more or less broad transverse scales ; the upper 

 and lower edge strongly keeled, and covered with folded scales ; the 

 tip torn, covered with a single, large, compressed, conical scale. 



Stephanohydra, Tschudi, Wiegm. Arch. iii. 331, 1837. Hypo- 

 trophis, Gray^ Ann. and Mag. Nat. Hist. 1846, in Jukes'* Narrat. 

 Voyage of H.M.S. Fly^ ii. 334. Hydrophis sp., Schlegel. 



Tschudi's snake from the Celebes is evidently the same as Mr. 

 Jukes'. The figure and Latin description do not represent or men- 

 lion the large size nor the keeled form of the ventral shield, which 

 induced me (as it appears to have done M. Schlegel) to regard it as 

 Hydrophis, which had not come under my examination. 



1. Jukes' Hypoteophis. Stephanohydra fusca, Tschudi., 

 Wiegm. Arch. Naturg. iii. 332, t. 8, 1837. Hypotrophis Jukesii, 

 Gray, Ann. ^^ Mag. Nat. Hist. 1846, and in Jukes Narrat. Voy.Fly, 

 ii. 334, t. 1. Hydrophis pelamoides, var., Schlegel, Abbild, ii. 5. 



Pale olive-brown in spirits, rather paler beneath. 



a. In spirits (without bones of body). Length 5 feet. Darnley 

 Islands. Presented by J. B. Jukes, Esq. 



B. The head covered with scales like the body. The nostrils sur- 

 rounded by a small continued ring. Eyes mrrounded by a series 

 of small scales. Labial shields serrated, ivith a larger series above 

 them. Pupil round. Ventral shields very small, scale-like, sepa- 

 rate, on each side of a keeled ridge. Rivers. Acrochordina. 



Hemiophis, fam. Nectophis, Fitz. Syst. Rept. 1842. Colu- 

 broidea pars, and Bungaroidea, Fitz. N. Syst. Rept. 29, 31, 1826. 

 Les Boas pars, genus Acrochordus, Schlegel, Phys. Serp. 425. Pho- 

 lidophides, faux. 1, Atryphodonto pholidophides. 2. Chalinipholi- 

 dophides, Ritijen, Nov. Act. Nat. Cur. xiv. 1828, 259. Achrochor- 

 dinae, Bonap. Amp. Eur. 7. 



12. Chersydrus. 



Tail compressed, prehensile, sword-shaped: body fusiform, 

 covered with small rhombic scales with a central tubercular keel. 



