513 



Oz. Av. 



25. Plexor hallucis longus, . , . . 0*22 



This acts in the Otter as a common flexor, and is analogous to the 

 flexor profundus of the hand. 



26. Tibialis posticus, . . 0*06 



27. Plexor digitorum brevis, Q-02 



28. Plexori longo accessorius, 0*01 



29. Tibialis anticus, 0-32 



30. Extensor digitorum longus, 0-14 



31. Extensor minimi digiti, 0*03 



Its tendon passes under the groove of the outer ankle, with that of 

 the -peronceus brevis, and is inserted into the outer side of the ungual 

 phalanx of the little toe. 



32. Peronseus tertius, 0*02 



33. Peronseus brevis, 0*06 



34. Peronseus longus, 0*05 



B. — Muscles of Fore Limb. 



1. Trapezius scapularis, 0*47 



2. Trapezius clavicularis, 0*64 



3. Sternomastoideus, 0*72 



Inserted into the first rib, the top of sternum, and raphe of lower part 

 of neck. 



4. Cleidomastoideus, 0*1 7 



5. Omo-atlanticus, No. (1), 0*27 



Arises from the anterior surface of the transverse process of the atlas, 

 and is inserted into the anterior third of the spine of the scapula. 



6. Omo-atlanticus, No. (2), 0*21 



Arises from the anterior surface of the transverse process of the atlas, 

 and is inserted into the posterior third of the spine of the scapula. 



7. Serratus magnns, 1-11 



In this muscle I have included the levator anguli scapulce, which is 

 quite distinct from omo-atlanticus No. 2, and takes its origin from the 

 middle of the occipital line, and is inserted into the vertebral edge of 

 the scapula, immediately above the end of its spine. The remainder of 

 the serratus magnus takes its origin from the costal processes of the cer- 

 vical vertebrae (2 — 7), and from the first seven ribs* 



* There are fourteen ribs in all. 



