MYOLOGY OF REPTILES. 



235 



marginal ones ; it is inserted along a sigmoid line extending from 

 the postero-external angle of the hyposternal to the middle of the 

 xiphisternal and by a special fasciculus and tendon into the lateral 

 process of the pubis. 



The latissimus colli, figs. 151, 152, 21, consists of two parts ; 

 both are attached, above, to aponeuroses connecting them with 

 the cervical diapophyses ; the fibres of the posterior division, 

 fig. 149, 21 a, pass down and rather backward, over the muscles of 

 the base of the neck, and are inserted into the midline of the 



151 



ifli, 



Side view of superficial muscles of trunk, head and limbs, Emys Europa'a. xxxvin. 



epi- and ento-sternals : the fibres of the longer anterior portion 

 sweep transversely across the lateral and lower parts of the neck, 

 fig. 152, 21. 



The extensor caudce, fig. 151, 47, includes the neural portions of 

 the myocominas of this region from its base, where the foremost 

 has a sacral origin, to near the tip. The flexor caudce, lateralis, 

 ib. 48, consists of the lateral parts of the same muscular seg- 

 ments. The flexor caudce inferior is shown at ib. 49 : \\\e flexor 

 caudce lumbalis in fig. 150, 50: the flexor caudce obturatorius in 

 figs. 151 and 156, 51. 



The following are muscles of the tympano-mandibular arch. 



The temporalis, figs. 151, 152, i, arises from the parietal and 

 superoccipital spines, and is inserted into the coronoid part of the 

 mandible. The pteryy 'oideus, figs. 148, 149, 152, 4, arises from 

 the outer surface of the pterygoid, and is inserted into the internal 

 tuberosity of the articular element of the mandible. The apertor 

 oris, or digastricus, figs. 150, 153, 3, arises from the mastoid, and 

 is inserted into the angular process of the mandible. The dilatator 



