276 THE MYOLOGY OF THE EAVEN. 



129. The sacro-lumhcdis muscle in the Raven is but 

 moderately developed, and quite intimately l)lended 

 with the longissinius dorsi throughout its entire 

 extent. 



It is only in the highly organized vertel^rates (Homo) 

 that we find a great complexity of the musculature of 

 the dorsal region. Mivart, alluding to this matter, says 

 that " the erector S'pinfB presents in man a degree of 

 differentiation not generally found in animals below 

 his class. Thus in the Iguana and Chameleon it is but 

 divisible into the longitudinal parts answering respect- 

 scribed in the preceding miiscle [ohliqutis ohliq'td], and attached to 

 the zygapophysis of the twelfth to the sixth cervical vertebrte 

 inclusive : the ninth fasciculus, which forms the main anterior 

 continuation of the longtis colli 2^osticus, is longer than the rest, 

 and receives, as it advances, accessory fibres from the spinous 

 processes of the seventh to the third cervical vertebrae inclusive, and 

 is inserted, partly fleshy, partly by a strong tendon, into the side of 

 the broad spine of the vertebra dentata " {Anat. of Verts., vol. ii. 

 pp. 87-88). 



It is three years since this footnote was written, and at this date 

 I can add to it the synonymy of the longvs colli posticus as compiled 

 for us by Gadow, who designates the muscle as his " System des M. 

 spinalis." It is as follows : — 



" 7. System des M. spinalis. 

 S^nnalis dorsi. Gurlt, p. 18. 



,, ,, Selenka, p. 96, No. 6. 



Long posterieur du cou (pt.). Gervais et Alix, ]). 14. 

 Longissimus dorsi (pt.). Watson, p. 56. 



"Theil III. 

 Strecker des Tragers. Wiedemann, p. 76. 

 M. extensor atlantis. Tiedemann, § 212. 

 Halsdornmuskel. Meckel, System, p. 294, No. 5. 

 Longus colli p>osticus (pt.). Selenka, p. 95, No. 4. 

 Longus colli posterior. Garrod, Proc. Zool. Soc, 1876, p. 338. 

 Extensor magnus colli (pt.) ; sjjlenius colli. Watson, p. 57." (Bronn's 

 Klassen des Thier-Reichs, vi. Bd., p. 110). 



