[23] Genus _Crotalus_, LIN.--C. _confluentus_, SAY.--Brownish, varied with greenish-yellow, a triple series of brown spots, the anterior vertebral ones confluent, and the posterior ones separated into bands. _Body_ brownish cinereous, varied with greenish yellow; a triple series of fuscous spots; dorsal series consisting of about forty-four large transversely oblong oval spots, each widely emarginate before and behind, and, excepting the posterior ones, edged with greenish-white, the ten or twelve anterior ones, crowded and confluent, those of the thicker part of the body separate, those near the cloaca and upon the tail united with the spots of the lateral series, and forming bands; lateral series, spots rounded, opposite to those of the back; between the dorsal and lateral series is a series of obsolete, fuliginous spots, alternating with those of the two other series; _head_ above scaly, scales of the superior orbits, and of the anterior margin, larger and striated; _beneath_ yellowish-white, immaculate. Plates of the body 179; of the tail 27.--JAMES. [24] Louis Augustin Guillaume Bosc (1759-1828) visited the United States in 1796; later he taught at the Versailles Zoölogical Garden. It is uncertain as to which particular work is here referred to. François Marie Daudin, whose specialty was reptiles, wrote _Histoire naturelle, générale et particulière des Reptiles_ (Paris, 1802-04), which is probably the work cited.--ED. [25] Genus _Ameiva_.--A. _tessellata_, SAY. Tesselated lizard.--The back and sides of the body and neck are marked by nine or ten longitudinal lines, and eighteen or twenty transverse ones, dividing the whole surface in a tesselated manner, the interstitial quadrate spaces being black; these lines are light brown on the back, and assume a yellow tint on the sides; the scales of these portions of the body are very small, convex, and rounded; _the top of the head_ is olivaceous, covered by plates arranged thus: 2 with an intermediate small one at their tips; 1, 2, 1, the largest, 2, and 3; superior orbits of the eyes with four plates, of which the two intermediate ones are much the largest; _belly_ bluish white; _throat_ and _neck_ tinged with yellow, and covered with somewhat larger scales than those of the back; _anterior feet_ yellowish within, and covered with minute scales; on the exterior and posterior sides greenish white with confluent black spots and large scales; _posterior feet_ behind greenish white with confluent black spots and minute scales; the anterior side yellowish covered with large scales; pores of the thigh very distinct and prominent; _tail_ elongated, rounded above, light brown, with a few lines of black spots near the base; _beneath_ yellowish white immaculate, the scales carinated, and placed in transverse series. Total length 1 foot, tail 8½ inches.--JAMES.