o/Bradypus trldactylus. 53 



transverse processes below the sixth, and is inserted into tlie 

 superior angle of the scapula inseparable from the rest of the 

 serratus ; it is more separate in the Armadillo, but less sepa- 

 rate in the Orycterope. 



The splenius is distinct, moderate in size, arising from the 

 spines of the third, fourth, fifth, and sixth cervical vertebrae, 

 and is inserted into the transverse process of the atlas ; this 

 part seems to correspond with the splenius capitis of other 

 animals, but it has no occipital attachment ; the second part, 

 or splenius colli, arises from five spines below the last-named 

 muscle, and is inserted into the transverse processes of the 

 second, third, fom'th, and fifth cervical vertebra. 



The complexus arises from the transverse processes of all 

 the cervical vertebras, and is inserted into the occipital bone ; 

 it has no bi ventral portion, and showed no traces of tendinous 

 intersections. 



The semispinalis colli, longissimus dorsi, multifidus spin^e, 

 recti capitis postici, obliqui capitis, and rectus capitis anticus 

 major were not remarkable in any respect. The intercostals 

 were not divisible into distinct strata ; and I saw no traces of 

 transversi thoracis anterior or posterior. Longus colli was 

 large, but exhibited nothing unusual in its attachments. 



Serratus magnus, when separated artificially from the levator 

 scapula, arises from the eight superior ribs (Meckel says 

 seven) ; its insertion is normal, into the loAver two-thirds of 

 the vertebral costa of the scapula ; it is undivided, but thin in 

 the middle, but is separated into two parts in Dasyjpus. It is 

 not split in the Orycterope. 



Omohyoid is absent in the sloths, as Cuvier and Meckel 

 mention : the former refers to its existence in the Anteater ; 

 but Owen does not mention its presence in the Great Anteater, 

 and it is absent in the Armadillo, as Galton very correctly 

 observes, and in the Orycterope. 



Sterno-cleido-mastoid arises from the front of the sternum, 

 from the first rib, by a few aponeurotic fibres, and from the 

 inner end of the soft rudimental clavicle ; the latter origin is 

 extremely slight, barely sufiicient to justify the middle particle 

 of the name ; it is not distinctly continued over the great pec- 

 toral, but the muscles of each side are connivent in the mesial 

 line ; it is inserted by two slips into the paramastoid process ; 

 the muscle is split into true sterno- and cleido-mastoid portions 

 in the Six-banded Armadillo and in all the Anteaters. 



Sterno-hyoids and sterno-thyroids were normal, as also were 

 the digastric (which, as is often the case, had but one belly), 

 mylohyoid, thyrohyoid, and hyoglossus. The other muscles 

 of the neck were not examined. 



