. Outlines of zoology. The only living repre-sentative of this class isthe New Zealand Lizardor Tuatara — Hatteria{Sphenodon)punctata. Lizard- FlG. of Chelonianheart.—^After Huxley. , Right half of ventricle ; 3., septum;/.z/. half of ventricle ; , rightauricle ; /.a., left auricle ; , leftaortic arch ; , right aortic arch;^., pulmonary arch. RHYNCHOCEPHALIA. 619 like in appearance, it measures from one to two feetin length, has a compressed crested tail, is dull olive-greenspotted with yellow above and whitish below.* It is nowrare, but is preserv
. Outlines of zoology. The only living repre-sentative of this class isthe New Zealand Lizardor Tuatara — Hatteria{Sphenodon)punctata. Lizard- FlG. of Chelonianheart.—^After Huxley. , Right half of ventricle ; 3., septum;/.z/. half of ventricle ; , rightauricle ; /.a., left auricle ; , leftaortic arch ; , right aortic arch;^., pulmonary arch. RHYNCHOCEPHALIA. 619 like in appearance, it measures from one to two feetin length, has a compressed crested tail, is dull olive-greenspotted with yellow above and whitish below.* It is nowrare, but is preserved in some small islands off the NewZealand coast. It lives in holes among the rocks or insmall burrows, feeds on small animals, and is nocturnal Fig. 337.;—Heart and associated vessels of tortoise.—After Nuhn. , Right auricle; superior venae cavas ) and inferior venacava () enter it. Right half of ventricle ; pulmonaryarteries 0$.a.) and left aortic arch {Laa.) leave it; cceL^ coeliac;^.00., dorsal aorta, Left auricle ;_^.z., pulmonary veinsenter it. Left half of ventricle ; right aortic arch (r.^o.),giving off carotids (tf.) and subclavians (). The skull, unlike that of any lizard, has an ossified quadrato-jugal,and therefore a complete infra-temporal arcade; the quadrate is firmlyunited to pterygoid, squamosal, and quadrato-jugal; the pterygoidsmeet the vomer and separate the palatines; there are teeth on thepalatine in a single longitudinal row, parallel with those on maxillaand mandible, and the three sets seem to wear one another away;there is also a single tooth on each side of a kind of beak formed by the premaxillse; the nares are divided. The vertebrae are amphiceelous or b
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192, booksubjectzoology
