. Zoology of Egypt. twice as distant from the end of the snout as it is from the eye, and inthe former about li times. This is the only point in which they are not perfectlyalike, but I believe it to be satisfactorily explained by the difference in the methodsof their preservation. Both conform to Heydens description of V. ocellatus and toProf. Boettgers account of V. microstictus. Vakanus niloticus, Hasselq. & Linn. (Plate XVIII.) Le Monitor du Nil ou Ouarau, Cuv. Reg. An. ii. 1817, p. 25. Le Monitor du Congo, Cuv. 1. c. p. 25. Lacerta nilotica, Hasselq. & Linn. Iter Palaest. 1757, p. 311 ; L
. Zoology of Egypt. twice as distant from the end of the snout as it is from the eye, and inthe former about li times. This is the only point in which they are not perfectlyalike, but I believe it to be satisfactorily explained by the difference in the methodsof their preservation. Both conform to Heydens description of V. ocellatus and toProf. Boettgers account of V. microstictus. Vakanus niloticus, Hasselq. & Linn. (Plate XVIII.) Le Monitor du Nil ou Ouarau, Cuv. Reg. An. ii. 1817, p. 25. Le Monitor du Congo, Cuv. 1. c. p. 25. Lacerta nilotica, Hasselq. & Linn. Iter Palaest. 1757, p. 311 ; Linn. Syst. Nat. i. 1766, p. 3G9 ; , Descr. An. 1775, p. capensis, Sparrmann, Resa Goda Hop. 1783, p. niloticus, Schn. Hist. Amph. ii. 1801, p. elegans, part., Daud. Rept. iii. 1803, p. steltatus, Daud. 1. c. p. 59, pi. niloticus, part., Daud. 1. c. p. 51; Is. Geoff. Descr. de lEgypte, Hist. Nat. ?1827, p. 121, pi. 8. fig. VAEANTJS NILOTICUS. 141 Tupinambis ornatus, Daud. Ann. Mus. ii. 1803, p. 240, pi. xlviii. Monitor pidcher, Leach, Bowdichs Mission to Ashantee, 1819, p. 493; Griffiths An. King. is. 1831, p. 203, elegans, part., Merr. Tent. Syst. Amph. 1820, p. ornatus, Merr. 1. c. p. 59. Polydtedalus niloticus, Wagler, Syst. Amph. 1830, p. capensis, Wagler, 1. c. p. 165. Monitor ornatus, Gray, Syn. Griffiths An. King. ix. 1831, p. niloticus, Dum. & Bibr. iii. 1836, p. 476 ; Wiegm. Arch. f. Nat. 1837, ii. p. 228 ; A. Dura. Cat. Eept. Paris Mus. 1851, p. 50; Peters, Mon. Berl. Ak. 1862, p. 271 ; Steindach. Sitzb. Ak. Wien, lxii. 1, 1870, p. 330; Gasco, Viagg. Egitto, pt. ii. 1876, p. 106 ; Blgr. Cat. Rept. B. M. ii. 1885, p. 317; Ann. Mus. Civ. Genova, ser. 2, xvii. (xxxvii.) 1896, p. 17; id. op. cit. 1897, p. 277 ; Mocquard, Cent. Soc. Philomathique, 1888, p. 115* ; Anderson, Herpet. Arabia & Egypt, 1896, p. 101; Boettger, Kat. Rept. Mus.
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