

80 



GENERAL BIOLOGY 



Serratus, arising from the little knobs on the transverse 

 processes of the vertebrae which represent the ribs, and inserted into the 

 under side of the suprascapula, which it draws backwards, outwards, or 

 inwards, according to the division which is contracted. 



(d) Muscles inserted into the hind-limb. 



e. g. Gluteus (iliacus externus, or gluteus medius), arising 



cor. ; at/. 



Pet. st. 



f. A. 



Fig. 24. A A Ventral View of the Muscular System of a Frog. 



ad.long,, Adductor longus ; ad.mag., adductor magnus ; one., anconaeus ; cor.rad., 

 coraco-radialis ; dtd., deltoid : c.ob., external oblique ; e.cr., extensor cruris ; gast., 

 gastrocnemius ; grac., gracilis ; La., linea alba ; pct.ab., abdominal part of the 

 pectoral muscle ; pct.st., sternal part of the same ; r.ab., rectus abdominis ; sar., 

 sartorius ; sm., mylohyoid ; t.i., tendinous intersections ; t.A., tendo Achillis ; t.f., 

 tibiofibula ; tib.ant., tibialis anterior ; tib.post., tibialis posterior ; v.int., vastus 

 internus ; x.c., xiphoid cartilage. (After Borradaile.) 



B. Dissection of special muscles of the left hind leg of the toad (redrawn from 

 Jammes). Muscles shaded in black are extensors; in gray, flexors. 



