1897.] NATURAL SCIENCES OF PHILADELPHIA. 51 



and are inserted as one continuous sheet upon the bases of the sec- 

 ond and third metatarsi. Nothing comparable to these fascicles are 

 described by Burmeister. 



The Abductor pollicis pedis is quite as described by Burmeister. 



Burmeister gives an account of a muscle named by him Abductor 

 hallucis which arises from the plantar fascia and is inserted upon 

 the fibular side of the first phalanx on a level with the foregoing. No 

 such muscle is found in T.fuscus, but a number of tendinous fibres 

 pass in its place from the plantar fascia to the Transversalis pedis- 

 The Flexor brevis digitorum sends a large fascicle to the toe, and it 

 is possible it is this slip which Burmeister has named separately. 



The Abductor digiti minimi extensor and the Abductor digiti min- 

 imi internus are distinct muscles corresponding exactly to Bur- 

 meister's description. 



The Abductor digiti minimi arises by two distinct heads instead 

 of one as described by Burmeister. Both muscles touch the belly 

 of the Palmar interossei instead of permitting an interval to be de- 

 fined between them. 



The Extensor brevis digitorum pedis in addition to its origin from 

 the calcaneum yields a slender tendon from the belly of the Exten- 

 sor longus pollicis high up on the leg. Burmeister does not men- 

 tion this slip nor is it figured by him. The first, second and third 

 digits possess separate extensors which are specializations from the 

 Extensor brevis digitorum of human anatomy. 



The Plantar interossei. — Seven muscles are seen on the plantar as- 

 pect. The first muscle is inserted on the tibial side of the second 

 metatarsal bone ; the second and third muscles on opposed sides of 

 the second and third bones ; the fourth and fifth muscles on opposed 

 sides of the third and fourth bones ; the sixth muscle on the fibular 

 side of the fifth metatarsal bone. 



The Dorsal interossei. — Three muscles are seen on the dorsal as- 

 pect. One on the tibial side of the second metatarsal bone an- 

 swers to the first Plantar interosseous. One on the tibial side of the 

 third metatarsal bone answers to the third Plantar interosseous; 

 one on the tibial side of the fourth metatarsal bone answers to the 

 sixth Plantar interosseous. 



The dorsal muscles are those which at the same time are the most 

 powerful of the plantars. In other words the plantars which are 

 the more powerful occupy in their surfaces of origin the sides of the 

 metatarsal so completely as to be visible from the dorsal aspect of 



