1901.] THE MUSCLES OF THE IXOILATA. 703 



but in (74) only an adductor minimi. In (79) there was also an 

 adductor quarti digiti. 



Interossei or Flexores breves. — In the Pig (4, 6), Cbevrotain 

 (20), Water-Chevrofain (23), Tapir (55), and Hyrax (67, 68) 

 there are four double-headed muscles corresponding to those of 

 more generalized mammals. In the Horse (56, 57, 58) there are 

 three, but Chauveau points out that the one belonging to the 

 medius has been transformed into the '■ suspensory ligament " of 

 the fetlock. 



In the Rhinoceros (63) Beddard and Treves (XX.) describe four, 

 but there are only three toes, and in their figm-e (fig. 5, p. 1 5) one 

 muscle labelled interosseous clearly rises from the pisiform, and is 

 probably an abductor minimi which has shifted its attachment to 

 the annularis. In the Elephant (71) Miall and Greenwood 

 describe three palmar and three dorsal interossei. 



In the Bovid»(32, 33, 3.1, 38, 39, 40, 49) there are two flexores 

 breves, but they are entirely ligamentous. 



Unfortunately, we know very little definitely about the nerve- 

 supply of the hand-muscles of the Ungulates, but the researches 

 of Paterson and Dun make us suspect that, in the Elephant at 

 least, the median nerve plays a much larger part than it does in 

 Man and, so far as we know, most other mammals. We hope that 

 at some future date these authors will publish the result of their 

 dissections. 



Bibliography. 



1. Cotibb et Laurillabb.- — • Planches de Myologie,' 



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 II. Chatjveau's ' Comparative Anatomy,' Fleming, 2nd ed. 

 1891. 



III. Ctrautot.kt et A i.ix. — ' Reeherches Bur l'Anat. de 



l'Hippopotame,' 1 s, '>7. 



IV. Humphry. — ' Observations in Myology, 1 l s 7i v . 

 V. Lebbbeb. — ' Myologie Cbmpare'e. 5 Lyon. 1897. 



VI. Bronx. — -Classen und Ordnungen des Thierreichs.' 

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