126 



midline of the back, is about 20 mm . from a median line, 

 and is by a slip which is joined to the eleventh rib. 



The muscle is inserted into the Panniculus Carnosus of 

 the neck, spreading into a fan-shaped portion and also 

 united with its fellow of the opposite side. 



Fibres of this insertion run down on the sides of the 

 neck. The width of the Dermo Dorsi Cervicalis is about 

 20 nlra . Its length is 150 mm . 



This Dermo Dorsi Cervicalis is probably homologous 

 with those concentric fasciculi of muscles, which Owen 

 mentions in Erinaceus, and have the same function, only 

 more limited in nature. 



M. Dermo Plexor Antebrachii. 



The muscle which Mivart identifies as the posterior part 

 of the^ Latissimus Dorsi, I consider as simply one of those 

 deeper layers of the skin muscle. 



I do this, because, although its origin is the same, or 

 nearly the same as that of the Latissimus of man, its in- 

 sertion is very aifferent. Moreover at its upper edge it 

 is slightly separated from the anterior part of the Latissi- 

 mus, by the Dermo Dorsi Cervicalis already mentioned. 

 This muscle is of a triangular shape and quite long. It 

 arises by digitations from the eighth to the thirteenth rib, 

 and is inserted along the Autibrachium, where it unites 

 with the Flexor Carpi Ulnaris. The function of this 

 muscle is to help flex the fore-leg, and is thus an opponent 

 of certain other cutaneous muscles to be described. These 

 muscles which act as flexors of the fore-leg, are neces- 

 sarily large, considering the fossorial habits of Tachy- 

 glossa. 



M. Dermo Brachialis Anterior. 

 This acts with the Dermo Flexor Antebrachii as a flexor 



