. Outlines of zoology. Zoology. 584 REPTILES. dentaries, are lodged in distinct cavities ; beside and eventually beneath the teeth lie reserve " germs " of others. Each ramus of the mandible consists, as in most Reptiles, of a cartilage- boneâthe articularâworking on the quadrate, and five membrane bones âdentary, splenial, coronoid, angular, and surangular. The hyoid region is very simple. mx Aft**! A\"l /t\* \ t. > /KiMl ' f â \ 'â'*}, / '«.' 1 â¢- c "' n I- " *'» 1 -h. - V f '' Li*v-*J\ A"yin /,»,"/ ,tW -j. Fig. 254.âCrocodile's skull from dorsal sur
. Outlines of zoology. Zoology. 584 REPTILES. dentaries, are lodged in distinct cavities ; beside and eventually beneath the teeth lie reserve " germs " of others. Each ramus of the mandible consists, as in most Reptiles, of a cartilage- boneâthe articularâworking on the quadrate, and five membrane bones âdentary, splenial, coronoid, angular, and surangular. The hyoid region is very simple. mx Aft**! A\"l /t\* \ t. > /KiMl ' f â \ 'â'*}, / '«.' 1 â¢- c "' n I- " *'» 1 -h. - V f '' Li*v-*J\ A"yin /,»,"/ ,tW -j. Fig. 254.âCrocodile's skull from dorsal surface. , Premaxilla; mx., maxilla; /., lachrymal; , prefron- tal ; /., jugal ; , postfrontal ; , quadrato-jugal ; y., quadrate; sq., squamosal; pa., parietal; , epipterygoid; f., frontal; pterygoid (on lower surface); , os trans- versum (on lower surface) ; »., nasal. The pectoral arch includes a dorsal scapula and a. ventral coracoid (with a characteristic foramen); there are no clavicles nor epicoracoids, but there is a sternum and a so-called interclavicle or episternum ; the fore-limb is well though not strongly developed; there are five digits, webbed and clawed. In the pelvic arch, large ilia are united to the strong ribs of the two sacral vertebrae : the pubes, or more strictly the epipubes, slope for-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Thomson, J. Arthur (John Arthur), 1861-1933. Edinburgh, Glasgow and London, H. Frowde and Hodder & Stoughton
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Keywords: ., bookauthorth, bookcentury1800, bookdecade1890, booksubjectzoology
