PLATE IX. 
DIAGRAMS OF THE MUSCULATURE OF THE WING OF 
THE LOGGERHEAD OR STEAMER DUCK —Tachyeres 
cinereus (Gm.). 
A. Diagram of the superficial musculature of the inner aspect of the right wing. 
B. Diagram of the inner aspect of the right elbow-joint with the superficial muscles and the 
brachialis anticus removed. 
In the subjoined key the wording of the original rough key to the diagrams is preserved, and 
the proper names of the muscles are added in brackets, these and any other additions being 
printed in italics. The terminology used is that of Shufeldt, Myology of the Raven (1890), 
in which a full synonymy, reproduced from Gadow (Bronn’s TAier-Reichs , vi. Bd., iv. Abth., 
1888) will be found. 
For further description see p. 14.3. 
1. Sternum. 2. Carina of sternum. 3. Clavicle. 4. Head of coracoid. 5. Head of 
humerus, ensheathed in tendon. 6. Lower end of humerus. 6 a. Head (sic, i.e. distal end) 
of humerus, ensheathed in tendon. 7. Lower end of radius. 8. Lower end of ulna. 9. Carpus. 
10. Carpo-metacarpus. 11. Knob on carpo-metacarpus, round which runs tendon of 44. 
12. Digit of bastard wing. 13. Knob on lower end of radius. 14. Knob on end of carpo- 
metacarpus. 15. Pectoralis major reflected. 16. Pectoralis minor. 17. Smaller pectoral 
muscle with tendon inserted on humerus ( pectoralis tertius). 18. Muscle from below coracoid 
with tendon inserted on head of humerus under large tendon (of biceps ) ensheathing head (coraco- 
brachialis). 19. Muscle from dorsal surface to head of humerus (teres el infraspinatus ). 
20. Muscle (biceps: portion inserted on radius). 21. Muscle (biceps: portion inserted on tdna ). 
22. Muscle, with tendon running over ant. (upper) knob of humeral condyle to ulna (scapular 
part of the triceps). 23. Deeper muscle attached to length of surface of humerus: tendon to ulna 
between knobs of humeral condyle (humeral part of the triceps ). 24. Muscle with head on lower 
part of humerus (extensor metacarpi radialis longior). 25. Muscle with tendon over head of 
humerus (pronator brei'is). 26. Deep muscle: upper end on head of humerus, along greater part 
of its length to radius (pronator longus). 27. Muscle (flexor carpi tdnaris brevior). 28. Muscle 
attached to ulna (Flexor digitorum profundus). 29. Muscle (flexor carpi ulnaris ). 30. Muscle 
fibres joined on to 42 (flexor digitorum sublimis). 31. Tendon passing from scapula (sic, 
? coracoid) to head of humerus (long head of the biceps). 32. Tendon ensheathing head of 
humerus (short head of the biceps). 33. Tendon of pectoralis minor passing round to head 
of humerus. 34. Tendon of 18 inserted on head of humerus. 35. Tendon of 17 inserted 
on head of humerus. 36. Tendon of 21 on to ulna. 37. Tendon of 20 on to radius. 
38. Tendon of 23. 39. Tendon of 22. 40. Tendon of 25 to humerus. 41. Tendinous 
knob of 29 (due to presence of sesamoid ossification). 41 a. Tendon of muscle 29 on carpal. 
42, 42a, 42&. Tendon from head of humerus to carpal (i.e. tendinous band from which the flexor 
digitorum sublimis arises). 43. Tendon of 30 round notch of carpal. 43a. Tendon (43 
ontinued) down metacarpus. 44, 44 a. Tendon of 28, running round in notch on metacarpal. 
45. Tendon of 24: runs behind radius to metacarpus. 46. Tendon of 27 to metacarpus. 
47. Deep ligament: radius to metacarpal. 48. Ligament: radius to metacarpal. 49, 50. Deep 
ligaments: humerus to ulna. (51. Tendinous band from ulnar carpal to end of metacarpus.) 
[In the original diagram A is tinted in water colours, bone and muscle being much more 
clearly differentiated than they are in the plate, owing to the yellow and red colours used 
having practically the same value in the collotype reproduction.] 
