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



The serratus mac/mis appeared to be in two distinct divisions, with which the preceding 

 muscle seemed at first sight to be incorporated as a third factor. Both are thin and 

 tan-shaped, and both are inserted into the sabre-like inferior angle of the scapula, the 

 upper overlapping the lower at insertion. The latter factor arose from the third to the 

 sixth ribs inclusive, posterior to their cartilages, while the origin of the former was 

 confined to the first and second ribs. 



Though not strictly under the same category as the muscles of the shoulder, the 

 omo~hyoid may, I think, be noticed here, since one of its normal attachments is at the 

 superior costa of the scapula. I did not succeed in finding this muscle in the Armadillo, 

 and therefore conclude that it is absent. Both Meckel and Ouvier are silent with 

 ivspect to its presence or absence in this animal; but both say positively that in the 

 Sloths it is entirely absent — " manque tout-a-fait 



The latter author describes this muscle in the Anteater 1 (species not given) ; but Pro- 

 fessor Owen makes no mention of it in his description of the muscles of the tongue of 



Myrniecophaga jubata 



5J 



. 



2 



Tmpe.ius.— This muscle is well seen on reflecting forward over the head the scapular 



hield. Its fibres are coarse, and it appears to be made up of two distinct factors. 



The upper, corresponding to the "portion occipitale " of Cuvier 3 , arose from the 



dlular tissue in the middle line of the cervical region, for about five inches below the 



•coiput, and was inserted along the principal spine of the scapula as far as the end of 



I he acromion— the whole extent of its acromially inserted portion being overlapped by 



an olFset from the upper part of this factor of the muscle, which passed under the terminal 



portion of the ac romio-basilar to become finally lost in the strong fascia which invests 



shoulder and arm 



by Cuvier, took 



ertebr 



The lower, which answers to the portion termed " dorsale " „, __, _ W - D ~ 

 from the neural spines of the third and succeeding dorsal vertebra, and from a strong 

 fibrous aponeurosis stretching between the spines and metapophyses of the lumbar 

 , «« - ne It then passed upwards and outwards to be inserted by a broad triangular 

 endori along the posterior half of the principal spine of the scapula, being slightly over- 

 bad here by the occipital portion of the muscle. In the specimen from which I took 



IT ™ ' t "^^ ° f tllC fct - de *cribed portion of the muscle were pale in colour, 

 Mute those of the dorsal factor were of a deep rich reddish-brown tint. This contrast 



Pl-ness in the Z^r ^^^^ * "* * T *■* — * C ™' 

 tmLfuZf thlS T SClG ^ inSGrted int0 the clavicle - According to Meckel' the 



i^s^rrs 011 mto the posterior haif ° f this w in the Anteater > and int ° 



' Op. cit. tome iv. 1* partie, p. 490 



4 Op. cit. p. 468. 



