Xlll 



PHYLUM CHORBATA 



275 



end attached to the foot the insertion. According to their action 

 muscles are divided into flexors which bend, and extensors which 



^hmf. 



'i.c.hy 

 o.st 



Fig. 928.— Rana esculenta. The muacles from the ventral aspect. On the left side (right of 

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

 add. hrtv, adductor brevis ; add. long, adductor longus ; OAid. mag. adductor magnus ; del. del- 

 toid ; ext. cr. extensor cruris ; ext. trs. extensor tarsi ; FE. femur ; gn. hy. genio-hyoid ; 

 i?«i>'. gastrocnemius ; hy.gl. hyoglossus ; I'/ia. Xm. inscriptio tendinea ; I. alb. linea alba; 

 my. Ivy, mylo-hyoid,; ohl. int. obliquusinternus ; obi. ext. obliquus externua ; o.st. omosteruum ; 

 P- c. ky. posterior comu of hyoid ; pet. pectoralis ; pctn. pectineus ; per. peroziteus ; ret. abd. 

 rectus abdominis ; reel. int. inaj. rectus internus major ; vect. int. min. rectus internus minor ; 

 «a*". sartorius ; sb. mt, sub-mentalis ; aem. ten. semi-tendinosus; tib. ant. tibialis anticus; tih. 

 post, tibialis posticus ; TI, FJ. tibiofibular vast, int. vastus internus ; x. at. xiphistemum. 



