.REPORT ON THE MARSUPIALIA. 187 



Fig. 4. 2>~*- Origin of adductor indicis. 



p v . Insertion of adductor annularis. 



p l *. Origin of adductor annularis. 



p.r. Radial head of flexor brevis indicis. 



p.u. Ulnar head of flexor brevis indicis. 



f*. Flexor brevis annularis. 



f h . Flexor brevis minimi digiti (dragged inwards). 



d 2 . to d 6 . Dorsal interossei. 



p 2 '. Insertion of adductor indicis. 



h. Rudimentary hallux. 



a. Rudimentary minimus. 

 Fig. 5. Diagram of the dorsal interossei of the left foot of the Ornithorhjnchus 

 p>aradoxus. 



d 1 . to d 5 . Dorsal interossei. 

 Fig. 6. Plantar aspect of the left foot of the Echidna setosa. 



p 1 . Adductor hallucis. 



p 2 . Adductor indicis. 



p 3 . Adductor medii. 



p*. Adductor annularis. 



p 4 '. Additional slip of the adductor annularis. 



p 5 . Adductor minimi digiti. 



f 1 . Flexor brevis hallucis. 



f 2 . Flexor brevis indicis. 



y 5 . Flexor brevis minimi digiti. 



f.d. Outermost belly of the flexor brevis digitorum. 



d 1 . Abductor hallucis. 



d 3 . Second dorsal interosseus. 



e.p.n. External plantar nerve. 

 Fig. 7. Left foot of the horse- -plantar aspect. 



f 3 . The suspensory ligament of the fetlock (flexor brevis medii). 



d 3 . Second dorsal interosseus. 



d*. Third dorsal interosseus. 



PLATE X.— Abdominal and Pelvic Viscera of THYLACINUS 



and CUSCUS. 



Fig. 1. A small portion of the upper part of the intestinal canal of the Thylacine to shew 

 the long club-shaped villi. 



