154 Prof. A. Macalister on the Myology of 



this muscle misses the clavicle — for instance, in Manis Dal- 

 inannu, in which the arrangement is similar, but the muscle is 

 crossed by an inscription at the line of the clavicle (Humphry); 

 this is interestino:, as Manis is a fossorial animal like the 

 Wombat. In the Civet ( Viverra civetta) this same arrange- 

 ment exists, and an inscription is present (Devis) ; and in the 

 Agouti and Guinea-pig, Dog, Dingo, Badger, Lion, and many 

 other animals a tendinous line marks the junction. In the 

 Rhinoceros there is no tendinous inscription, nor in the Llama. 

 Prof. Owen describes the anterior fibres of this muscle in 

 Perameles as continued into the pectoralis major, which I sup- 

 pose is a similar arrangement. The trapezius in SarcophUus 

 arises from the occipital crest and nuchal ligament and from 

 the upper nine or ten dorsal vertebras ; it is inserted into the 

 scapular spine, the upper border of the acromion, and to the 

 outer fourth of the clavicle. The part of the muscle corre- 

 sponding to the root of the spine of the scapula was weak and 

 tendinous, and nearly divided the fleshy part into an upper 

 and lower trapezius ; however, a thin muscular margin near 

 the spines of the vertebree saved it from this division. In 

 Macropns giganteus it arises from the ligamentum nuclide and 

 from the three lower cervical and six upper dorsal spines. It 

 is situated similarly in Bennett's Kangaroo. In the Opossum 

 and Phalanger its occipital origin is much larger, and it ex- 

 tends downwards along all the dorsal spines. The insertion in 

 all is constant into the outer half of the clavicle, the acromion 

 process, and the whole spine of the scapula ; and in the Opos- 

 sum it is attached to the u})per part of the vertebral edge of 

 the scapula, as well as to the spine. 



• Beneath the trapezius, the omo-atlantic stretches, in the 

 Wombat, from the atlas and axis to the outer half of the sca- 

 pular spine, and into the upper margin of the acromion pro- 

 cess. In SarcophUus its attachments were from the trans- 

 verse process of the atlas and to the outer half of the spine of 

 the scapula, and into the upper edge of the acromion process. 

 In the Wallaby it arises from the three upper cervical vertebra?, 

 and is inserted into the anterior fourth of the scapular spine 

 and into the whole length of the clavicle. In the Giant Kan- 

 garoo it is attached to the transverse process of the atlas 

 and axis, and is inserted as in the Wallaby. In the Opos- 

 sum it arises from the atlas alone, and is inserted into the 

 anterior fifth of the spine of the scapula. (For an account of 

 the synonyms of this muscle, see the anatomy of Bradypus 

 tridactylus, Ann. Nat. Hist. 1869, vol. iv. p. 52.) 



The rhomboideus is composed of three parts, but they are 

 not separable in the Wombat ; it arises from the upper four or 



