1010 MESSES. B. C, A. WINDLE AND T. Q. PAKSOKS ON [DeC. 19, 



13. The palmaris longus is distinct. 



14. The flexor siiblimis digitorum is absent in Bradypus, feeble in 



Choloepus. ' 



15. The flexor profundus digitorum has no pahnar sesamoid. 



16. The pronator quadratus is very small. 



17. The supinator lougus is usually double. 



18. The extensor minimi digiti becomes an extenspr brevis 



digitorum and often rises from the carpus or metacarpus. 



19. The extensor ossis metacarpi pollicis is inserted into the 

 trapezium. 



20. Tiie supinator brevis is inserted into the upper third of the 



radius. Sometimes it is bilamiiiar in Choloepus. 



21. The caudo-femoralis is fused with ectogluteus. 



22. Pectiiieus is sometimes double in Bradi/pus. 



23. The adductor cruris (gracilis) is double. 



24. The semitendiuosus has only an ischial head. 



25. The flexor cruris lateralis (biceps) always has the short femoral 

 head. 



26. The tenuissimus is absent. 



27. The extensor longus digitorum has a condylar origin and is 



inserted into the metacarpal bones. 



28. The extensor brevis digitorum has a fibular origin in Bradypus, 

 tarsal in Cliola^pus. 



29. The peroneus longus never runs across the sdle, sometimes 



it has a femoral origin, sometimes the muscle is absent 

 altogether. 



30. The peroneus brevis is sometimes absent. 



31. The gastrocnemius has no fabellsD. 



32. The plantaris is often absent. 



33. The flexor brevis digitorum rises from the calcaneum. 



34. The tibialis posticus is single. 



35. The accessorius pedis is present. 



Mtrmecophagid^. 



1. The sterno-maxillaris is present. 



2. The sterno-glossus is present. 



3. The rectus thoracis lateralis is present. 



4. The splenius colh is absent or very slightly developed. 



5. The rhomboid has no occipital origin. 

 G. The subclavius is absent. 



7. "When there is a coraco-brachialis it is only the long head 



which is present. 



8. The flexor brevis cubiti (brachialis auticus) does not rise 



from the neck of the humerus. 



9. The extensor cubiti (triceps) has more than one scapular 



head. 



10. The flexor carpi radialis reaches the metacarpus. 



11. The palmaris longus is usually indistinct or absent. 



12. The flexor sublimis digitorum has only one tendon. 



