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Show 1880.] PALAEARCTIC AND iETHIOPIAN TOADS. Dimensions. 561 From snout to vent, Length of head Breadth of head From eye to nostril From eye to tip of snout Greatest diameter of orbit Interorbital space Horizontal diameter of tympanum Vertical diameter of tympanum.... Length of parotoid Breadth of parotoid Body Fore limb Hind limb Tibia a. m. 0-069 0-021 0025 0-0055 0010 0-008 00055 0-0045 0-006 0-014 0-005 0-048 0041 0-086 0026 m. 0-093 0-025 0032 0-0055 0011 0009 0007 0-0055 0-0065 0-022 0010 0-068 0-050 0-112 0-033 c. m. 0-085 0-021 0-028 0-005 0-010 0008 0006 0005 0007 0-022 0-008 0.064 0-045 0-090 0-028 d. m. 0038 ! 0011 0-013 0-003 0005 0005 0-004 0002 00025 0-008 0-003 0027 0020 0043 0013 m. 0-051 0-015 0017 0003 0-006 0-006 0003 0004 0005 0010 0005 0036 0033 0-063 0019 /• m. 0053 0014 0-019 0003 0006 0-006 0004 00035 0004 0011 0-004 0039 0032 0064 0-019 9- m. 0-136 0037 0047 0008 0017 0012 0014 0006 0007 0-024 0013 0099 0078 0162 0047 a. cS • Gaboon. Brussels Museum. b. 2 • Senegal. Paris Museum. c. 2 • Benguella. Milan Museum. d. Young. Egypt. Brussels Museum. e. <S. Var. A. B. pantherinus). f. 2- Var. A. B. pantherinus). g. 2 • Var. B. Boutry, W . Africa. Leyden Boutry, W, Africa. Leyden Museum (as Museum (as Port Elizabeth. British Museum. Description.-The head resembles that of B. vulgaris. The snout is short, rather prominent, truncated; the canthus rostralis is rather distinct. The nostrils are nearly equally distant from the anterior angles of the eyes and from the tip of the snout; and the distance between them equals two thirds of that between one of them and the lip. The eyes are nearly equally distant from the tip of the snout and from the angles of the jaws. The interorbital space, flat or slightly concave, is rather broad, its breadth being equal to or a little less than the greatest breadth of the upper eyelid. The tympanum is very distinct, large, vertically oval; its greatest diameter equals at least three fourths of that of the eye in the adult; it is smaller in the young. The cleft of the mouth extends to the level of the centre of the tympanum. The tongue is rather large, elliptic, nearly twice as long as broad. The parotoids vary greatly; though always elliptical, and with slightly divergent inner edges, they may be very prominent or depressed, longer or shorter than the head from their front edge to the tip of the snout; their breadth equals from a third to half their length. But all these differences correspond with no others, nor with the localities whence the specimens come; and in a large series of specimens it is easy to find all the transitions; so that no importance must be attached to these peculiarities. |