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



inserted immediately beneath the inner tuberosity of the humerus, and above the 

 terminal portion of the latissimm dorsi, and is also fused at origin with the tendon of 

 the single (coracokl) head of the biceps. In Systrix the cor aco-br achialis has no com- 

 munication whatever with the biceps, which is single-headed in this rodent. It is repre- 

 sented by the middle and long varieties of Wood. At about the level of the middle of the 

 tendon of the latissimm dorsi, the muscle is pierced by a nerve (" perforans Casserii"?) 



which bores through the fleshy portion on the inner side of the median tendon of the 

 m usele, passes behind this latter, and emerges at its outer side, through the muscular 

 substance, to run across to the posterior part of the biceps. From immediately below 

 ho lower edge of the tendon of the latissimm dorsi the muscle takes insertion into the 

 humerus, its mserted part being prolonged as far as the inner condyle, just above the 

 ongm of he e^trochleo-anooneus. That portion of this muscle which is cut off by the 



""'™ J ' tS emer f nce ' and which is k**ted immediately below the tendon of the latis- 



stmvs dom, may be regarded, I think, as the representative of the middle or ordinary 

 variety! ""^ **" "* ^ d ™ ards > representing the long 



*2?T R0UeSt ° n *? ? , inted ° Ut t0 me this musole in the Tenrcc ( Oentete, ecau- 



d s net I Z HT^ , J ,° th SUrt and *** Varieties > and ™*> "Leovcr, quite 



distinct trom the biceps for its whole length 



e M ?tt » > n c d - SC '? eS ° % thB ^ "** ° f the coraco-braehialis as present in 



»t.n Cuvier, too, represents this variety alone in his figures of the myology of 



the " Tatu 



Dasypm sexchictus 



edi TZZti f T Sde ' arisin§ by a Str0n ^ flat te ndon from the superior 



icoid p ocS oT , ° aV ' 1 f hUmerUS ' imMediatel y ext erna I to the root of the 

 ZZ i si 1 1 SCSpUla ' bein S COm P' etel y —red by the terminal portion of the 



r zi:: ^r in; ss£.*5sr eica ;r in the alrior face of 



abo\ 



tuberosity piers on either side 



.inlr cicL^rx fi r the r ove sroove ' the ***■ ^^ »- * •- 



attains its ZeZlfZlf*' ' ^ ° Ut '"^ and at the ***** °' the arm 

 by d,.,, eslmilw \ l ° minS S ° meWhat am P^°™ - shape. From this point it, 



posterior « hole fib 'TT' ^^ W<W the same, on its inner side and 



*MyW?±T ST f ^.7"***** *** « -t continued to the 



tendons, or rather t vevv d 7 , ^ ^ * termination, it di vides into two 



which is inserted into il , ^ ^^ SpHtS int ° two bra ncnes, the outer of 



the fossa scooped ou f h ?v a ;' T* " ^ ^ ° f the rad ™ s > ^ the inner into 

 op doutof thecal edge^he^and overhung by the coronoid pro- 



In Maries abietu,,i, among Carnivora r ~ " — — — 



*n*fe inserted nert between the ^j^r^d^ ' T,, authorit ^ " The coraco-brachialis has an accessory 



***, and » attacked to thelZr ST^I* - ^ 11 ^ 1 * ^ theK ^avoo; but in the Opossum it is very 

 1 Op. cit. p. f,i4. iP ^ 0t the hnmems.-Qp. «*. p. 515. 



2 Op. cit. pi. 2(50. 



