BY W. J. S. McKAY. 337 



Orsithokhynchus. 



Owen says — "The rhomboid is a single muscle, but thick Hiid 

 long, and inserted into the narrow base of the scapula." 



CoUES describes the rhomboid as, " single, of large size and 

 thick," and states its origin, and its insertion, as " broad and fleshy 

 into the apex behind, and about one-third along the posterior 

 border of the scapula." 



Meckel — " Rhomboideus, unus tantuni sed crassus, valde 

 longus, cucullari tamen tenuior, a marginis scapulae superioris 

 dimidio infeiiore ad occiput tendit, a cucullari tectus spatio satis 

 aniplo inseritur." 



CuviER and Laurillard give, in PI. 266, tig. 1, a figure of the 

 rhomboid, and describe it in three parts, (c) rhomboide de la tete, 

 (c^) du cou, (r) du dos, and they call the whole "dorso-trachelien." 



jNI. levator scapula ET M. SERRATUS MAGNUS. 



Echidna : M. hvator srapulix, et M. serratus magnus, Westling, Leche, 

 Mivart. 



Ornithorhyxchus : Costo-scapulark, serratus magnus s. anticus, et 

 levatores anguli scajmloi, Coues ; Serratxis anticus, Meckel ; Grand denteU, 

 Cuvier and Laurillard. 



M. LEVATOR SCAPUL.E. 



Echidna. 



Origin. This muscle arises from the tips of the transverse 

 processes of six cervical vertebra?, viz., from the axis to the 7th 

 inclusive. 



Insertion. The muscular bellies from these origins spread 

 out to form fan-shaped muscles, which are inserted on the greater 

 part of the suprascapula, and along a narrow curved area of the 

 inner face of the scapula adjoining the whole length of the 

 vertebral border and the upper two-fifths of the spine. 



Relations. At its origin the acromio-trachelien hides the 

 muscle from view ; at its insertion the muscle is related to the 

 insertions of the serratus, rhomboid, and dorsal part of the acromio- 

 trachelien. 



