British reptiles and batrachians . Ocl pe a Fig. 24.—Upper or exterior surface. Pe fs Ocl Pt Fig. 25.—Lower or interior surface. Explanation of Bones of Frogs Skull. (Membrane bones of one side removed in each case.) Ocl, exoccipital; Pe, Petrosal (prootic); Et, girdle-bone or sphen-ethmoid ; Ty, tympanic ; Fp, fronto-parietal; J, quadrato-jugal; Mx, maxillar}-; Jmx, prcemaxillary ; N, nasal ; Ps, parasphenoid (from the wedge shape); Pt, pterygoid ; PI, palatine; V, vomer. 60 REPTILES AND BATRACHIANS. By these illustrations of the skull (alluded to on p. 51) thechanges which occur during the g
British reptiles and batrachians . Ocl pe a Fig. 24.—Upper or exterior surface. Pe fs Ocl Pt Fig. 25.—Lower or interior surface. Explanation of Bones of Frogs Skull. (Membrane bones of one side removed in each case.) Ocl, exoccipital; Pe, Petrosal (prootic); Et, girdle-bone or sphen-ethmoid ; Ty, tympanic ; Fp, fronto-parietal; J, quadrato-jugal; Mx, maxillar}-; Jmx, prcemaxillary ; N, nasal ; Ps, parasphenoid (from the wedge shape); Pt, pterygoid ; PI, palatine; V, vomer. 60 REPTILES AND BATRACHIANS. By these illustrations of the skull (alluded to on p. 51) thechanges which occur during the growth of a frog from the tadpoleto maturity may be studied, as also the names of the bones. Thedarker parts are those where the cartilage has become hardened,or is replaced by bony pieces ; one is viewed from the top of thehead, and the other from the interior of the mouth. CHAPTER IX. THE COMMON TOAD. Order, Ecaudata. Family, Bufonidm. Genus, Bufo. Species, vulgaris. The chief generic and specific characteristics of Bufo vulg
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Keywords: ., bookcentury1800, bookdecade1880, bookidbritishrepti, bookyear1888
