286 Rev. B. Havigliton on the Muscular 



31. Soleus. None. 



32. Flexor digitorum longus. 0*80 oz. O. usual. I. into 

 the ungual phalanges of the first, second, and third toes only. 



33. Flexor hallucis longus. 0*20 oz. O. from the back of 

 the outer condyle of the femur, from the tendon of the extensor 

 femoris caudalis. I. into the tendon of the flexor digitoruin 

 longus. 



34. Tibialis posticus. 0*72 oz. This muscle is inserted 

 into the near ends of the first and second metatarsal bones. 



35. Flexor digitorum brevis. 0*76 oz. Consists of three 

 distinct muscles, distributed to the second, third, and fourth 

 toes : a, flexor 2^^^ digiti perforatus, 0'45 oz. : Z», flexor 3" di- 

 giti perforatus, 0*20 oz. ; c, flexor 4*^ digiti perforans, 0*11 oz. 

 The flexors a and b are perforate flexors, and are distributed 

 to the penultimate phalanges, while flexor c is carried on to 

 the ungual phalanx, and supplies the office of the flexor longus, 

 which is wanting in the fourth toe. The flexor brevis of the 

 second toe {a) takes its origin partly from the calcaneum and 

 partly from the tendon of the plantaris. 



36. Flexori longo accessorius. 0*34 oz. O. from the cal- 

 caneum and cuboid bones. I. into the back of the common 

 tendon of the flexor digitorum longus, which is distributed to 

 the first, second, and third toes only. 



37. Tibialis anticus. 1 



38. Extensor hallucis. i-l*22 oz. 



39. Extensor digitorum longus. J 



O. from the tibia and fibula, and by means of a long tendon 

 from the anterior surface of the outer condyle, inside the knee- 

 joint. 



40. Peroneus tertius. 0*15 oz. The tendon of this muscle 

 crosses the back of the foot to be inserted into the metatarsal 

 of the first toe. 



^ 41. Peroneus brevis. 0*17 oz. Inserted into the outer 

 side of the outer tarsal bone (cuboid and rudimentary fifth 

 metatarsal). 



42. Peroneus longus. 0*40 oz. Takes its origin from the 

 fibula, and is closely associated with the outer gastrocnemius. 



43. Extensor femoris caudalis. 14*55 oz. This important 

 muscle is similar to that found in the Crocodile {ilnd. p. 328), 

 and derives its origin from the under surfaces of the transverse 

 processes, and from the sides of the inferior spinous processes 

 (chevron bones or hfemal processes) of the caudal vertebrse, 

 from the first to the fifteenth. 



N.B. The first chevron bone begins at the junction of the 

 second and third caudal vertebrae. 



44. Marsupialis externus. 1*05 oz. 



