1901,] CHLAMTDOPHOKUS TRUNCATUS. 109 



origin than in either Mucahster's or Hyrtl's specimens. In Mac- 

 ahster's it rose from the last 5 ribs, in Hyrtl's from the last 6, in 

 mine from the last 9. Upon the left side there was a connection 

 between this muscle and the pectoralis quartus (text-fig. 14). I 

 notice that Windle & Parsons ^ state that in the Dasypodidae the 

 latissimus dorsi frequently rises from all the ribs posterior to the 

 3rd or 4th, and when this extensive origin occurs there is a close 

 union with the insertion of the pectoralis forming a more or less com- 

 plete floor to the axilla — in fact a well-developed " Achselbogen." 



Dorso-epitrocMearis (text-fig. 15, d.epit.) corresponds with Mac- 

 alister's description, but is without insertion upon the inner condyle 

 of the humerus. It is attached (as in Dasypxis) ' entirely to the 

 superficial fascia of the forearm. 



The SpJenins capitis was in two parts: — (i) a small triangular 

 muscle rising from the fibrous septum in the dorsal mid-line of the 

 neck and inserted upon the occiput; (ii) a narrow band of muscle, 

 lying in the same plane as part i., with origin from the neural 

 spines of the anterior one or two thoracic vertebrae and inserted 

 upon the skull close above the ear-tube. These two parts agree 

 exactly with the drawing of Dasypus sexdnctus given by Cuvier 

 and Laurillard ^ 



I saw no Rectus thoracis lateralis, a characteristic Edentate 

 muscle. It was not seen by Hyrtl, and in Macalister's specimen it 

 was very small. Possibly I may have overlooked it although fully 

 aware of its importance. 



The Serratus magnus rose (as in Hyrtl's specimen) from 8 ribs. 

 In Macalister's it took origin from 7. 



The following trunk-muscles were observed, and agreed with 

 Macalister's description : — llhomhoicleus capitis (text-fig. 13, rh.c). 

 Serratus posticus posterior (text-fig. 13, s.p.p.). Trachelo-mastoid. 

 Rectus capitis anticus major. Rectus capitis anticus minor. Longus 

 colli. Rectus ahclominis (text-figs. 13 & 14, r.abd.). Levator anguli 

 scapulce. The Serratus posticus anterior — as stated by Macalister — 

 was absent. 



Muscles of the Fore-limb. — The Pectoralis major (text-fig. 14, 

 pect.maj.) had no clavicular origin. In this point it agrees with the 

 pectoralis of Dasypus but differs from that of Tatusia *. 



Pectoralis quartus (text-figs. 13 & 14, pect. iv) rose from ribs 5-9 

 (in Macalister's specimen its origin was restricted to 2 ribs) ; on 

 the right side it was, as described by Macalister, inserted in con- 

 junction with the abdominal part of the pectoralis major, but prox- 

 imal to it on the left (text-fig. 15). In Tatusia the pectoralis 

 quartus rises from 6 ribs, in Dasypus from 4 ^ 



The Suhclavius (text-fig. 14, scl.)^ as in Hyrtl's specimen, had no 



^ Windle & Parsons, 1. c. p. 322. 



- Gallon : " The Muscles of the Fore and Hind Liraba of Dasypus sexinctus." 

 Trans Linn. Soc. sxvi. 1870, p. 531. 



3 Olivier & Laurillard, Planches de Myologie, pi. 259. fig. 3. 1, -\-\. 

 * Macalister, 1. c. p. 240. 

 ' Macalister, 1. c. p. 241. 



