. Bulletin - United States National Museum. Science. 56 BULLETIN" 15 4, UNITED STATES NATIONAL MUSEUM The preservation of the primitive types, miirinus and aruhensis, on islands, instead of on tlie mainland, is not without precedent. It may be explained by the theory that the ancestral viurinus stock was once a mainland type, but that with topographical changes in the region north of Venezuela, this stock Mas isolated on the islands, Bonaire, Curasao, and Aruba, while on the mainland is was changed to the progressive ancestral lemniscatus stock. Since Bonaire is farthest from the mainland
. Bulletin - United States National Museum. Science. 56 BULLETIN" 15 4, UNITED STATES NATIONAL MUSEUM The preservation of the primitive types, miirinus and aruhensis, on islands, instead of on tlie mainland, is not without precedent. It may be explained by the theory that the ancestral viurinus stock was once a mainland type, but that with topographical changes in the region north of Venezuela, this stock Mas isolated on the islands, Bonaire, Curasao, and Aruba, while on the mainland is was changed to the progressive ancestral lemniscatus stock. Since Bonaire is farthest from the mainland, it was probably isolated first, and it is not surprising that the presumably least specialized modern group of individuals is to be found here. Before the isolation of Curacao and Aruba, the ancestral murinus stock apparently became modified n\scatua oteUifer CoTrvraon stock of nigr^co\or an8 1 emtwsc a\"us Ancestral leff>T^\5catu5 stock Ancestral mur\rvus stock Tnod\t\e^ toward lemniscatus. Tn\ir\nus n Curacao) mur\T\u5 (On b . _oriaArel Ancestral •murvnus stock Figure 12.—Diagkam of the supposed eelatioxships wrrniN the lemniscatus GROUP toward lemnUcatus and this, if true, will account for the present transitional nature of these particular insular populations. The writer's interpretations of the genetic relationships within the lemniscatus group are expressed by the foregoing diagram. THE DEPPII GROUP CNEMIDOPHORUS DEPPII DEPPII (Wiegmann) MANY-LINED RACE-RUNNER 1834. CUicmidophorKs- dcpijii Wiegmann, Herpetologia Mexieaniia, p. 29, (type locality, " Mexico ").—Gray, Cat. Liz. British Mus., 1845, p. 22.—Bocourt, Miss. Sci. Mex. et Amer. Cent., vol. 3, 1874, p. 281, pi. 20c, figs. 5, 5a-d; pi. 20d, figs. 1, la-&.—O'Shauohnessy, Zool. Bee. for 1878, vol. 15, 1880, " Beptilia ", p. 7.—Sumichrast, La Naturaleza, ser. 1, vol. 6, 1884, p. 39.— Garman, Bull. Essex Inst,, vol. 16, 1884, p. 13.—Boxtlenger Cat. Please note that
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