Knott — On AbnoDualities in Suman Myology. 415 



four times : it "was present in two of the twenty-three subjects in 

 which the scalenes were specially dissected. 



Scalenus accessorius. — Arises from the posterior tubercles of trans- 

 verse processes of the cervical vertebrae from the fourth to the sixth 

 (Macalister), from fourth to seventh (Krause), and is inserted into the 

 first rib close to the scalenus medius, of which it seems to be a differen- 

 tiated portion. It is separated from the latter muscle by part of the 

 brachial plexus. 



Transversalis cervicis anticus longus colli accessorms (Luschka) ; 

 scalenus anticus proprius colli (Krause). — This rare muscle arises from 

 the anterior tubercles of the transverse processes of the cervical 

 vertebrae, from the seventh to the fourth, and passing upwards is 

 attached to the anterior surface of body of axis immediately below the 

 superior articulating surface, and to the front of the base of the trans- 

 verse process of the atlas. It is placed posterior to the rectus capitis 

 anticus major. I have met but one example of this muscle. 



Transversalis cervicis anticus (Eetzius). — Arises from the obKque 

 processes of the cervical vertebrae, from the sixth to the fourth; being 

 intimately connected to the longus colli, and passing u.pwards is 

 inserted into the upper three cervical vertebrae. Of this rare muscle 

 I have met with two specimens. One had the attachments described 

 by Eetzius ; the second was attached by its upper extremity to the 

 axis alone, just below and outside the superior articular surface. 



Transversalis cervicis medius (Ki-ause). — Of this extremely rare 

 muscle I have never met with an example. EJ:ause has found it 

 attached to the front of the transverse processes of the cervical verte- 

 brae, from the second to the sixth or seventh. 



Transversalis cervicis posticus minor; tracTielomastoideus minor ; tra- 

 clielornastoideus accessorius. — Arises from transverse processes of verte- 

 brae, from the second dorsal to the fifth cervical, and ascending to its 

 insertion is attached above to the transverse process of the atlas, and 

 mastoid process of the temporal bone. I have noted one specimen. 



Rliomhoideus occipitalis (ilurie, 3Iivart) ; occipito - scapular is 



(Wood). — Arises from the internal third of the linea semicii-cularis 



media ossis occipitis, above the attachment of the complexus, and is 



'inserted into the scapula, above the rhomboideus minor. I have met 



with three specimens of this muscle. 



Levator claviculae (Wood) ; cleido-cervicalis superior; trachelo-clavi- 

 cularis superior. — The clavicular attachment of this muscle is either to 

 the middle third of the bone, or to its acromial extremity. The upper 

 is more variable in its points of fixation. It has been found attached 

 to the transverse process of the atlas {cleido-atlanticus) ; to that of the 

 axis [cleido-epistropMcus^ ; to the oblique processes of the fourth and 

 fifth cervical vertebrae {cleido-cervicalis inferior; scalenus anticus acces- 

 sorius) ; to the transverse process of the sixth alone {cleido-cervicalis 

 irnus). It has also been found attached to the transverse process of 

 the third cervical vertebrae. The lower has, in some instances, been 

 seen to blend with the trapezius. I have met with two specimens of 

 the cleido-cervicalis imus, and one of the cleido-epistrophicus. Another 



