102 . REPTILES. 



Ophiol. p. 28 ; Latr. Rept. iv. p. 88 ; Baud. Rept. vi. p. 292. 

 Coluber atrovirens, Shaiv, Zool. iii. p. 449 ; Cuv. Regne Anim. ; 

 Merr. Tent. p. 110. Coluber luteostriatus, Gmel. Naturforscher, 

 xxvii. t. 3. f. 4. Coluber personatus, Daud. Rept. viii. p. 324 

 (young). Coluber viridiflavus, Boie, Isis, 1827, p. 536; Bonap. 

 Faun. Ital. pi. ; Schleg. Ess. ii. pi, 4. f. 11, 12. Zaraenis 

 viridiflavus, Wagl. Syst, Amph. p. 188 ; Dum. 6f Bibr. vii. p. 686. 



Habit moderately slender. Above dark olive, each scale with 

 a hghter or yellow streak; crown of head generally yellow- 

 spotted, and with a narrow yellow transverse streak, uniform in 

 some specimens of the varieties. Scales smooth, in nineteen 

 rows ; upper labials eight, the fourth and fifth touching the eye ; 

 anterior oculars two, posterior two. (See Ahlahes modesta.) 



a-d. Adult, e. Young. Bononia. Presented by J. J. Bianconi. 



/. Half-grown. Dalmatia. Presented by Dr. Heckel. 



g. Adult. Turin. Presented by Professor Bonelli. 



h, i. Half-grown. Rome. Presented by Sir W. C. Trevelyan. 



k, I. Young. Sardinia. Presented by Professor Bonelli. 



m. Adult. Algiers. From Paris as Z. hippocrepis. 



n. Adult. South Europe. 



0. Adult. South Europe. 



p. Adult. South Europe. 



5. Adult. South Europe. Presentedby the Zoological Society. 



r. Young. South Europe. 



Var. A. Coluber carbonarius, Schreibers ; Bonap. Amph. Eur. 

 p. 51 . Dark brown with hardly visible streaks, or uniform black. 



s. Adult. Naples. Presented by J. J. Bianconi. 



Var. B. Coluber caspius, Iwan, Voy. en Russ. i. p. 31/. pi. 21 ; 

 Gmel. Syst. Nat. i. p. 1112; Nordmann in Voy. en Russie par 

 Demidoff, Rept. pi. 5; Eichw. Faun. Caspio-Caucas. p. 113. 

 Coluber trabalis. Pall. Zoogr. Rosso-As. iii. p. 42. Hsemorrhois 

 trabalis, Boie, Isis, 1827, p. 538. Zamenis trabalis, Dum. Sf Bibr. 

 vii. p. 689. 



It was only after long deliberation, and a close examination of 

 the specimens in the British Museum collection, that we came 

 to the conclusion of the necessity of uniting this form with Z. 

 atrovirens. But on comparing the descriptions of Pallas, Dumeril, 

 &c., we were not able to find any true specific character by which 

 the species can be properly distinguished, or which may be 

 equally applied to several specimens. We may add, that the 

 specimen u perfectly agrees with the figure given by Nordmann, 

 as to the structure of shields and the coloration. 



Olive, each scale with a lighter streak, forming together paler 



