XIII 



PHYLUM CHORDATA 



255 



limbs. The dorsal muscles of the trunk are no longer divisible 

 into myomeres, but take the form of longitudinal or oblique bands 

 (cxtensores dorsi, &c.), lying partly above the vertebrae, partly 



L.alb 

 -ins.tend 

 add.br el. 



FIG. S75.-Rana esculenta. The muscles from the ventral aspect On 



figure) many of the superficial muscles have been cut and reflected to show the deep 

 .ti,w. .adductor bre'vis ; add. Ivng. adductor longus ; a*/. ,</. adductor magnus , ; , - d 

 toid; ext. cr. extensor cruris ; ext. ir*. extensor tarsi; FE. femur; gn. h;, gen o-hj^oid 

 tistr sastrocnemius hy.gl. hyoglossus ; ins. ten. mscriptio tendmea ; I. ail. line. 

 m^/m^y^obSt. obliquus internus ; obi. ext. obliqxms externus ; o.st. omorternum : 

 p. c. '%. posterior cornu of hyoid ; pc. pectoralis ; pctn. pectmeus ;^er. peronus 

 rectus abdominis ; rc. int. maj. rectus interims major ; sar sartorius ; 

 gem. <n. semi-tendinosus ; tib. ant. tibialis anticus ; tti.post. tibialis posticus ; II. \ 

 fibula ; ra.sf. <H/. vastus internus ; x. st. xiphi-sternum. 



