. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Chap. XII. Reptiles. 355. Sitana minor. Male with f'e gular poucli expanded (from GUnther's ' RjptileB of India ')• see with species belonging to the same group, as in so many previous cases, the same character either confined to the males, or more largely developed in them than in the females, or again equally developed in both sexes. The little lizards of the genus Draco, which glide through the air on their rib- supported parachutes, and which in the beauty of their colours bafile d
. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. Chap. XII. Reptiles. 355. Sitana minor. Male with f'e gular poucli expanded (from GUnther's ' RjptileB of India ')• see with species belonging to the same group, as in so many previous cases, the same character either confined to the males, or more largely developed in them than in the females, or again equally developed in both sexes. The little lizards of the genus Draco, which glide through the air on their rib- supported parachutes, and which in the beauty of their colours bafile description, are furnished with skinny appen- dages to the throat " like the wattles of gallinaceous ; These become erected when the animal is excited. They occur in both sexes, but are best developed when the male arrives at maturity, at which age the middle appendage is sometimes twice as long as the head. Most of the species like- \vise have a low crest running along the neck ; and this is much more- developed in the full-grown males, than in the females or young ; A Chinese species is said to live in pairs during the spring; " and if " one is caught, the other falls from " the tree to the ground, and allows " itself to be captured with impu- " nity,"—I presume from despair.^* There are other and much more remarkable diiferences between the sexes of certain lizards. The male of Ceratophora asp;ra bears on the extremity of his snout an appendage half as long as the head. It is cylindrical, covered with scales, flexible, and apparently capable of erection: in the femaile it is quite , rudimental. In a second species of the same genus a terminal scale forms a minute horn on the summit of the flexible appendage; " All the foregoing statements nificent work on the ' Keptiles of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecthumanbeings, bookyear
