30 Froceedings of the Roijcd Irish Academy. 



Rectus (4-60). The usual origin, by two heads, and insertion. 

 Vastus exteruus (8-00) and vastus internus (4-67), normal. 



The crureus (3-35), almost inseparably connected with the vastus 

 externus ; in some places there was no natural division. 



The popliteus ('65) : sesamoid bone developed in tendon of origin ; 

 the muscle, almost quadrilateral in form, occupied the upper third, of 

 tibia. 



The gastrocnemius externus and soleus, (3"67) and internus (1'87) 

 had both a sesamoid bone developed in their tendons of origin. The 

 soleus was inseparably connected with the former. 



Plantarws ('02) arose from the outer condyle. It was inserted along 

 with the gastrocnemius. 



Flexor longus digitorum and flexor hallucis longus (together 

 = 2-07) were united in their whole extent. They sent tendons to the 

 five digits of the pes. 



The tendon only of the tibialis posticus was present, the muscular 

 part was wanting ; the tendon extended from immediately above the 

 internal malleolus to the tuberosity of the scaphoid. 



Flexor brevis digitorum : scarcely any distinguishable muscular 

 fibres about ("05). 



Accessorius flexori longo was absent. 



The tibialis anticus (TSO) arose from the upper part of the outer 

 surface of the tibia, external tuberosity and corresponding part of in- 

 terosseous membrane. There were very weak intermuscular septa. 

 Insertion as usual into the first metatarsal bone. 



The extensor hallucis was inseparably connected with the extensor 

 longus digitorum (1'50), at least as far as their muscular bellies 

 were concerned, the tendons being quite distinct ; insertion normal. 



Peroueus quinti ("11), brcAus ("02), and longus ('40), as usual. 



Extensor brevis digitorum ("12) was as usual. 



The muscles of the pes presented no features of interest. The 

 dorsal and plantar interossei exhibited a curious relation to one 

 another, the weights of the plantar being "07 ; '07 ; '06 — the dorsal 

 being "07; "OB; '07; -07. On clearing off the muscles, a rather remark- 

 tible ligament, which I believe has not hitherto been noticed, was 

 brought into view. It was about four inches long, rounded,, white, and 

 shining, attached at one end to the middle and external cuneiform bones, 

 covering nearly the whole of their under surfaces, and at the other to the 

 posterior half of the fourth metatarsal bone, covering its lower surface 

 and part of its sides opposite the tarso-metatarsal articulation ; and 

 for about the posterior quarter inch of the second metatarsal bone it 

 was free, smooth and round. I could discover no trace of a nerve or 

 iirtery passing between it and the bone ; it was syinmetrical. An 

 analogous one was present in the manus. 



