. Outlines of zoology. Fig. 349.—Cervical vertebra of crocodile. ^..S., Neural spine; ^ posterior articular prOcess: , anterior articular process; ^cervical rib ; C, procffilous centrum. SKELETAL SYSTEM. 637 the mouth, covering the vomers, and determining the position of theposterior nares—at the very back of the mouth ; an os transversum ortranspalatine extends between the maxilla and the junction of palatineand pterygoid ; a postorbital rod (epipterygoid or columella) is formedby a downward process of the postfronlal meeting an upward processfrom the jugal; the quadrate is l
. Outlines of zoology. Fig. 349.—Cervical vertebra of crocodile. ^..S., Neural spine; ^ posterior articular prOcess: , anterior articular process; ^cervical rib ; C, procffilous centrum. SKELETAL SYSTEM. 637 the mouth, covering the vomers, and determining the position of theposterior nares—at the very back of the mouth ; an os transversum ortranspalatine extends between the maxilla and the junction of palatineand pterygoid ; a postorbital rod (epipterygoid or columella) is formedby a downward process of the postfronlal meeting an upward processfrom the jugal; the quadrate is large and immovable ; there are large ^^ Fig. 350. —Crocodiles skull from dorsal surface. , Premaxilla ; wzji:., maxilla; ^., lachrymal; ^,^ prefron-tal; 3., jugal; , postfrontal; ^ quadrato-jugal; y.,quadrate; sg.^ squamosal; ^a., parietal; ^ epipterygoid;/., frontal; pt-^ pterygoid (on lower surface); OS trans-versum (on lower surface); «., nasal. parotic processes; the tympanic cavity is completely bounded by bone ;the teeth, which are borne by premaxilla, maxillas, and dentaries, arelodged in distinct cavities; beside and eventually beneath the teeth liereserve germs of others. Each ramus of the mandible consists, as in most Reptiles, of acartilage bone — the articular — working on the quadrate, and five €38 REPTILJA. membrane bones — dentary, splenial, coronoid, angular, and sur-angular. The hyoid region is very simple. The pectoral arch includes a dorsal scapula and a ventral coracoid(with a characteristic foramen); there are no clavicles; the epicoracoidsare thin strips bet ween
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192, booksubjectzoology
