





MR. J. C. GALTON ON DASYPUS SEXCINCTUS. 583 



m. anconeus longus), which is probably a representative of the dorso-vpitrochlieih of 

 lower animals 1 . 



Pector alls major. — This muscle takes origin from the whole length of the sternum, 

 manubrium included, in the middle line, from the rnsifbim process, and from the upper 

 half of the abdominal aponeurosis which forms the anterior wall of the sheath of ili< 



rectus. 



There is no clavicular origin. 



A few delicate riband-like fibres appear to be derived from the outer side of the 

 muscle, which run down in an almost straight direction on. either side alon<> the abdo- 

 men, to be eventually lost in the fascia of the inguinal region. These may, however, 



more properly belong to some deep-lying element of the pamtlculus camosus. 

 The external oblique joins the aponeurosis at the point where the lowest fibres of th< 



pect 'oralis terminate. 



The pectoralis is thickest in the region of the manubrium stemi, and gradually thins 

 as it nears the lower region of the thorax and the abdominal aponeurosis. 



The muscle is inserted into the humerus by a broad, thin tendon, along the sharp 

 inner edge and hamular projection of the deltoid trochanter, being, as in man, folded 

 upon itself; so that its thin lower margin has the highest attachment, while the thick, 

 rounded, upper border is inserted much lower down, so as to fuse with the deUokl 

 muscle at its termination. The tendon, at its highest part, becomes continuous with a 

 shining aponeurosis which covers the head of the humerus. 



Meckel in his description of this muscle in the « Tatu," 2 attaches some importance to 

 the fascicle which arises from the ensiform process-" den er kraftvoll emporhebt, was, 

 wenn das Thier zusammengekugelt ist, fur das Athmen wichtig ist." This is applicable 

 however, to Tohmeutes alone, no other Armadillo being known to possess, or rather to 



o^x c, the faculty of rolling itself together into a ball 



, .. o annh nf thp two genera of Monotremata, namely, a specimen ot 

 In a representation oi each ot tne iwo geucia, * 



Omitkorkynchus paradoxus, and of Echidna «***. wluch I was enabled tl rough h< 

 kindness of Prof. Rolleston to examine at Oxford, I ^^f^^^'Z 

 tion of the nrusele into the ahdonnnal aponeurosis. In hot , ea.e s .o*cvc , th 

 portion was naturally differentiated from the pectoral faetor of the muscl, 



1 Muskellehre, p. 182, and fig. 88. 



so much so 



Op. cit. p. 508. 



■ « Die Schuppenthiere (the Maais) und Dosy** trkincti* kl.nnon 



op, cit. p. 64. on t«A»ar") "Tthasth 



(under the name ot Apar ) 



ich zusammcnrollen, wie ein I. 1."— Rapp. 



Darwin soys of this species (^ WL TT } a moralist rovM the WorK p. 96, 2nd ed. London 

 like one kind of English Woodlouse. -The Voyage j ^^ ^ ^ ^^ „ Annadaio „ , 



This is, further 



"One species only" according to the ' Cyclopia o. « 



faculty of rolling itself up into a round ball like a j^*^ 



Armadillo. Azara, he. cit. p. 197, says of this, eig » ^ prendre, cache m tet- . sa queue 



beule) parce quo e'est h#< Tatou, qui >~* ei ~+£ '° * 



personnes 



formant de tout son corps, une 



3. 



Mammals of Australia,' vol. L ; Waterhousc's « N it. Hist. 



He says further on (p. 199), "llya «*» *. ( ^^ rf Australia ; vo l. L ; 1 



• * For descriptions of the above species (?) see u lg43 ,_ 



of the Mammalia,' vol. i. p. 47 ; List of Mammaha m Bntish Mus 



4e 2 



