THE CARTILAGINOUS SKULL OF THE FROG

(AFTER “HUXLEY ) dle cuneiform b's of man. ‘he navicular b. of the horse. [L, 18.j—Sphenethmoid b. Fr., 08 en ceinture [Cuvier]. Syn.: girdle Ab, of certain of the Amhibia which resembles a dice-box with one half of its cavity divided y a longitudinal partition, and embraces a portion of the ethmoid, pre sphenoid, and orbito-sphenoid regions in a carpets ring. [L, 12, 121.j—Sphenoid b., Sphenoidal b. Lat., 08 sphenoideum. Fr., os sphénäide, Ger., Keilbein, Wespenbein. A b. which lies acro the base of the skull near its middle, and a ists in forming the orbits and the nasal fo æ. It is very irregular in shape, consisting of a body from each side of which project a lateral expansion (the greater wing), a horizontal proce (the le er wing), and a proce pialens of the manus of the horse. a 13.|—Small sesamoid b.