131 



which corresponds wholly or in p:irt to an os calcis, and 

 divides into four parts. The first of these divisions of 

 the Flexor Brevis Digitorum is inserted on the hallux 

 side of the distal end of the metatarsal of the index fin- 

 ger. The second is inserted on the hallux side of the 

 distal part of the metatarsal bone of the second finger, 

 and the third and fourth slips are inserted on both sides 

 of the distal extremity of the metatar&al bone of the third 

 finger. A small slip also goes to the little finger, and is 

 inserted on the hallux side. 



M. Plexor Brevis Minimi Digiti and Abductor 

 Minimi Digiti. 



A comparatively large mass of muscular fibres which, 

 perhaps, represents these muscles, arises from the tarsal 

 bone of the tibia! side of the leg and is inserted into the 

 peroneal side of the digit of the little finger. 



Mm. Lumbricales. 



Mivart found only four Lumbricales in the manus ; one 

 pair arising between the flexor tendons of the index and 

 middle digits, and going to the contiguous surfaces of those 

 digits ; another pair arising between the flexor tendons of 

 the middle and fourth digits, and passing to the contiguous 

 surface of those digits. In addition to these four there 

 were in my specimen, two more arising from the under 

 side of the common tendon, between the flexors of the 

 fourth and fifth digits, and inserted into the contiguous 

 sides of those digits. These three pair of Lumbricales 

 can best be found, by cutting the common flexor tendon 

 at the wrist, about an inch from the division into five ten- 

 dons, and turning the divided tendon backward over the 

 digits. 



ESSEX IXST. BULLETIN. IX 9 



