182 THE VOYAGE OF H.M.S. CHALLENGER. 



Fig. 2. f« 72 . and d v . The two parts of the abductor indicis or first dorsal 

 interosseus. 

 (P. Second dorsal interosseus. } Dorsal layer. 



d*. Third dorsal interosseus. 

 (P. Fourth dorsal interosseus. 

 d'\ Abductor ossis metatarsi minimi digiti. 



d' ; '. Abductor minimi digiti (the part inserted into the extensor 



■■ > > Dorsal layer, 



tendon). J 



tiP". Abductor minimi digiti (the part inserted into the sesamoid bone). 



Fiff. 3. Diagram of the distribution of the cutaneous nerves on the dorsum of the left foot 

 of Thylacinus. 



1. Anterior tibial nerve. 



2. Musculo-cutaneous nerve. 



3. External saphenous nerve. 



Fig. 4. Diagram of the cutaneous distribution of the plantar nerves in the left foot of the 

 Thylacine. 



1. External plantar nerve. 



2. Internal plantar nerve. 



3. Superficial division of the external plantar nerve. 



4. Deep division of the external plantar nerve. 



Fig. 5. Dissection of the intrinsic muscles of the right foot of the Cuscus. The plantar 

 cartilage (p.c.) has been divided and the outer portion thrown outwards 

 along with the opponens nunimi digiti (op 5 .). 

 p\ Adductor hallucis. 

 ;•. Raphe. 



p*. Adductor annularis. 

 p'. Adductor minimi digiti. 

 f 1 . Flexor brevis hallucis. 

 f\ Flexor brevis minimi digiti. 

 op 5 . Opponens minimi digiti. 

 d\ Abductor hallucis. 



i/ 6 , d G ', d s ". The three adductors of the minimus. 

 p.c. Plantar cartilage. 

 p.t. Plantaris tendon. 



1. Nerve to hallux. 



2. External plantar nerve. 



3. Superficial division of the external plantar. 



4. Deep division of external plantar. 



