Anatomy of Acanthidositta chloris. 



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met with in all birds in this region. It is attached anteriorly 

 by delicate tendinous strands to the quadrato-jugal bar 

 immediately below the eye and caudad by delicate fascia to 

 the hyoid. 



Myology. 



The following muscles are all that appear to call for 

 special remark in this paper. 



Dermal Muscles. 



Cleido-thyroideus (text-fig. 38). — Arising normally from 



the larynx, this muscle runs along mesiad of and closely 



attached to the pteryla colli ventralis until within a short 



distance of the furcula, when it suddenly leaves the skin, and 



Text-fig. 88. 



Dissection of the breast of Acanthidositta chloris, to shew the insertion of 

 the cleido-thyroideus muscles (cl.th.). 



running along the ventral ^ of the bone in question it 

 rapidly attains the middle line ; there it runs backwards for 

 a short distance, separated from its fellow of the opposite 

 side only by the narrow carina sterni. 



Latissimus dorsi dor so-cut aneus. — This is well developed 

 and arises unusually far back — from the roof of the pelvis 

 in the region of the anti-trochanter. Extending forwards 

 immediately under the skin, laterad of the pt. spinalis, it 

 passes eventually into the cucullaris dorso-cutaneus. 



Dermocleido-dorsalis. — This takes the form of a stout 



