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Show 1881.] LIZARDS FROM ECUADOR. 243 specimens, both male and female, of the latter species, is a median longitudinal groove on the belly from behind the prseanal region, the scales bordering the groove on each side being enlarged. 19. ANOLIS FUSCO-AURATUS. Anolis fusco-auratus, D'Orbigny, Voy. Ame>. Merid. Rept. pi. 3. fig. 2; Dum. & Bibr. Erp. Gen. iv. p. 110 ; Bocourt, Nouv. Arch. Mus. 1869, vi. Bullet, p. 15 ; id. Miss. Sc. Mex. hi. pi. 14. figs. 16, \6a. Anolis viridianeus, Peters, M.B. Ak. Berl. 1863, p. 147. One specimen, a female, from Pallatanga. 20. ANOLIS BUCKLEYI. Anolis buckleyi, O'Shaughnessy, P. Z. S. 1880, p. 492, pi. 49. The two specimens of this beautiful species obtained by Mr. Buckley have already been described. 21. ANOLIS BOUVIERI. Anolis bouvieri, Bocourt, Miss. Sc. Mex. iii. p. 58, pi. 14. fig. 8. Two specimens, apparently of this species, from Pallatanga and Canelos. M. Bocourt's type was from Guatemala. Specimens already identified by me in the British Museum as A. bouvieri are from Pebas and from Guayaquil. The one from the latter locality is that enumerated by Dr. Gunther as A. aneus in his list of Mr. Fraser's collection (P. Z. S. 1859, p. 89). Anolis a?neus, Gray, however, cannot be looked upon as a species, since the single specimen on which it appears to have been founded proves to be only a young Anolis alligator, D. & B. See O'Shaughnessy, Ann. N. H. ser. 4, vol. xv. p. 272. 22. LEIOCEPHALUS ACULEATUS. Leiocepalus aculeatus, O'Shaughnessy, Ann. N. II. ser. 5, vol. iv. p. 303 (1879). Four additional specimens from Canelos and Pallatanga afford me the opportunity of giving some further particulars about this remarkable species. On each side of the occiput are some erect scales, forming a flag-like border. These curious scales, which are not conical, are present in both sexes, and appear characteristic of the species, as they are not seen in L. iridescens nor, of course, in the species of the genus with small cephalic shields. The sexes are very distinct. The male is of much darker coloration, as previously described, and has the whole gular region deep black. It has also the tail covered with very large scales, and very strongly compressed, almost resembling Basiliscus in this respect. The female has the back light brown, with triangular bars of darker pointing backwards. The sides below the lateral crest are dark brown, sharply separated from the lighter hue of the back. The tail is compressed at the root only, rounded afterwards. This species would belong to the same section of Leiocephalus as L. hermi-nieri, D. & B., which also has the ventral scales keeled. That |