424 H. H. Wilder, The appendicular rnuscles of Necturus maculosus. 



From this point on the Figures are given in pairs , representing 

 corresponding views of the two limbs. The odd nurabered figures, placed 

 at the left of each pair, represent the anterior limb ; the even nuinbers 

 the posterior. 



Figs. 20 and 21. Superficial views of the free limbs; extensor 

 aspect. 



Figs. 22 and 23. Same view as the preceding ; deeper layer. 



Figs. 24 and 25. Same view as the preceding; diagrams illustrating 

 the origins and insertions of the rnuscles. ! 



Figs. 26 and 27. Superficial views of the free limbs; flexor aspect. 



Figs. 28 and 29. Same view as the preceding ; second layer. 



Figs. 30 and 31. Same view as the preceding; third layer. 



Figs. 32 and 33. Same view as the preceding; deep rnuscles. 



Figs. 34 and 35. Details of digit IV ; flexor aspect. 



Figs. 36 and 37. Flexor aspect of the free limbs; diagrams illustrating 

 the origins and insertions of the rnuscles. 



The abbreviations used in the figures to designate the separate 

 rnuscles are given in the list of the rnuscles at the beginning of the 

 paper, and also accompany each name in the descriptive part. The 

 separate digits are designated as II, III, IV and V, following the Inter- 

 pretation of Htjxley, who assumes that the missing digit is the first. 

 The separate bones do not require any explanation, except perhaps to 

 recall the facts that in the carpus and tarsus the intermedium is fused 

 with the outer bone of the proximal row, and that in the distal row the 

 elements associated with the two last digits are also fused. The following 

 abbreviations are used for rnuscles wbich do not appear in the text : 



la levatores arcuum 



dl dorsolai-yngeus 



ra rectus abdominis. 



