REPTIL1A. 261 



riridis FITZ., Trimeresurus viridis LACEP., Ann. du Mus. IV. PI. 56, fig. 2, 

 Bodroopam BUSSELL, Ind. Swp. PI. 9 ; East Indies, Sunda-islands, New 

 Holland, &c. 



b) With head scutate. 



Trigonocephalus BOIE (Tisiphone FITZ., Trigonocephalus FITZ., and Cen- 

 chris DAUD., FITZ.) 



Sp. Trigonocephalus Cenchris SCHL., Cenchris mokeson DAUD., Kept. v. PI. 60, 

 fig. 25, PI. 70, figs. 3, 4, Trigon. contortrix HOLBEOOK 1. 1. Vol. u. PI. 14, 

 in North America 1 ; Trigonocephalus rhodostoma REINW., Leiolepis rhodo- 

 stoma DUM., SCHLEGEL Abbild. PL 19, 49, Java. KUHL saw two work- 

 men in Buitensorg die in a few minutes after having been bitten by this 

 serpent. 



Vipera DAUD., SCHLEG. Pit between nostrils and eyes none. 



Note. All the species hitherto known are from the eastern 

 hemisphere. 



Vipera DAUD. Subcaudal scutes paired. 



a) With head covered above with scales or graniform scutes. Echidna 

 MEBE. (Vipera LAUEENTI.) 



Sp. Vipera Cerastes, Coluber Cerastes L., LACEP. Quadr. ovip. et Serp. II. PI. 

 i, fig. 2, DAUD. Kept. vi. PI. 74. fig. 2, BEUCE Travels to discover the source 

 of the Nile, Edinb. 1790, v. PL opposite p. 199, Diet. univ. d'Hist. 

 nat., Kept. PL 13, fig. 2; lancet-shaped, strongly keeled scales, light 

 grey-yellow colour; two little horns above the eyes, variable in 

 their development and sometimes entirely absent ; this serpent, which 

 occurs in Egypt, was known to the ancients, who make mention of 

 it in different places. MEEEEM confounds with it a species from 

 South- Africa, which has some erect scales above the eyes, but is 

 coloured quite differently, Vipera cornuta DAUD., Vipera lophophrys 

 Cuv. ; Vipera ammodytes DAUD., Coluber ammodytes L., Amomii. Acad. I. 

 p. 506, Tab. 17, fig. '2, DAUD. Kept. vi. PL 74, fig. i, STUEM Fauna, Am- 

 phib. Heft 2 ; at the point of the head a conical, erect and scaly tubercle ; 

 this species occurs in the south and especially the south-east of Europe. 

 Vipera aspis SCHL. Coluber Aspis L., Vipera berus Cuv., GUEEIN Iconogr., 

 Kept. PL 23, fig. i ; France, Italy, &c. To this species the observations 

 and experiments of CHAEAS refer, Nouvelles Experiences sur la Vipere. 

 Paris, 1669, 8vo. 



b) With head covered above with small scutes. Pelias MEEE. (Coluber 

 LAUE.) 



Sp. Vipera berus DAUD., Coluber Berus L. (and Chersea L.), Vipera cher- 

 sea Cuv., LAUEENTI Synops. Rept. Tab. n. fig. r, Coluber chersea STURM, 



1 Toxicophis leucostoma TEOOST, described in Ann. of the Lyceum of Nat. Hist, of 

 New York, in. 1825, p. 174, known to me only from an extract in OKEN'S Isis 1844. 

 s. 113, 114; is referred by DUMBEIL to Trigonocephalus piscivorus. 



