FIG. 421. Muscles of' the frog, 'ventral view. add.brcv, adductor 

 brevis; add.long, adductor longus; add. mag, adductor magnus; del, deltoid; 

 ext.cr, extensor cruris; ext.trs, extensor tarsi; FE, femur; gn.hy, geniohyoid; 

 gstr, gastrocnemius; hy.gl, hyoglossus; ins.ten, inscriptio tendinea; l.alb, linea 

 alba; my.hy, mylohyoid; obl.int, obliquus internus; obl.ext, obliquus ex- 

 ternus; o.st, ommosternum; p.c.hy, posterior cornu of hyoid; pet, pectoralis; 

 Pctn, pectineus; per, peronaeus; rct.abd, rectus abdominis; rect.int.maj, rectus 

 internus major; rect.int.min, rectus internus minor; sar, sartorius; sb.mt, sub- 

 mentalis; sem ten, semi-tendinosus; lib. ant, tibialis anticus; lib. post, tibialis 

 posticus; TI.FI, tibiofibulu; vast.int, vastus internus; x.st, xiphisternum. 

 (From Parker and Haswell.) 



498 



