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DR. J. MURIE ON THE THREE-BANDED ARMADILLO. 



107 



■ The sacro-lumbalis belies its name, reacliing neither the sacrum nor loins. Its costal 

 attachment is narrow and thin, covering the ribs a little way beyond their angles ; it has the 

 ordinary subsidiary tendons, the foremost being inserted into the head of the first rib. I 

 did not make out an extension of cervicalis ascendens with clearness. 



The thickest part of the longissimus dorsi is where it lies under the eave of the last 

 three dorsal and first two lumbar metapophyses. These processes in a manner protect it ; 

 iand this more flesby part lodged in the bony groove doubtless exerts a pulley-action in 

 tTie return spring of the spine from its flexed condition. As it has an insertion upon the 

 last three cervical vertebrae, this anterior portion, which is strong, comes under the defi- 

 nition of transversalis cervicis, as applied to the muscle in Man and other animals. 



The spinalis dorsi, though not voluminous, is certainly compact. It occupies the trough 

 between the metapophyses and spinous processes. Immediately beneath is a very appre- 

 ciable development of semispinalis. The component fascicular bundles of this cover two 

 vertebral laminae each, but lie well against the spines, posterior to the first dorsal. In 

 the neck the s. colli has a flatter position. There is another fair-sized deeply placed neck- 

 muscle outside the last, and with attachments (from cranium to last cervical) indicative 

 of its being a complexus major. Whatever significance may be borne by the long spinal 

 muscles in Tolypeutes, as regards reflection when the body is inturned, it is ol)vious from 

 Hyrtl's description and Cuvier*s plates that there is hardly any variation in the other 



Armadilloes . 



Unless the part described under the cutaneous sheets may represent a cephalic end, the 

 otherwise weakly developed trapezius has no forward or occipital extension in Tolypeules, 

 The more evident constituent of the muscle is 

 first and second, and expanding towards the sixth and seventh vertebral spines ; the 



a tenuous dorsal layer coming from the 



pular insertion covers the triangular space of that bo 



Cuvier, fig. 2, pi. 2C9, denot 



greater expansion of the cucuUaris ; and Meckel's', Macalister' s, and Galton*s observation 

 substantiate its duplicity in Dasijpus. The latter writer, in admitting two fact 



les 



portions occipitale et dorsale " of Cuvier, notes that the first arose from the neck for five 

 inches behind the occiput, and without clavicular fastening was inserted along the sca- 

 pular spine ; the second had attachments from the third dorsal rearwards to the lumbar 



g 



He describes [1. c. p. 527) moreover 



acromio-basilar " muscle, stretchin 



o 



from supraocclput to the metacromial process (Parker) 



this is Cuvier 



portion ccr- 



&c 



vicale " of the trapezius, and also regarded as an accessory division thereof by Meckel 



This last differentiated segment is analogous to a small roundish muscle met with 

 by me in Tobjpeutes. It sprang from the back of the skull, outside 1.he rhomboideus 

 capitis, and, running parallel with it, terminated in the said acromial projectio 

 ing to Macalister^ in the Armadillo, with a clavicular insertion, the above acromio-b 

 strip of Galton is a levator claviculse or trachelo-acromial (omo-atlantic, Baughton\ 



humeral, SumpJiry). This decision, as regards Tolypeutes, I might acquiesce 



Accord 



cer 



clavicular levator otherwise seemingly not being differentiated ; but Galton speciaUy d 

 tinguishes the presence of acromio-basilar and levator clavicula? in 



the same specimen 



* Prench trans, vol. yi. p. 222. 



" MyologT of Bradijptis,'* I c. p. 52. 



P2 



