﻿DR. J. MURIE ON THE THREE-BANDED ARMADILLO. 83 



the lower nuclial region ; 3, sterno-maxillaris, almost like an anterior continnation of 

 the last mentioned ; 4, dermo- trans versalis, oblique upper postnuclial fibres ; 5, platysma 

 myoides, with a gular distribution ; 6, dermo-spinalis, from the three foremost dorsal 

 spines to the scapular region ; 7, dermo-iliacus, between iliac and scapular regions. 

 8, dermo-costalis, joins the preceding, and comes from the seventh and eighth costal 

 appendages ; 9, dermo-ulnaris, from the last to back of elbow-joint ; 10, dermo-humeralis, 

 abdomen to humerus. 



Cuvier's lettering and nomenclature* of the skin-muscles of mammalia runs: 

 1, fronto-occipital (occipito-frontien) ; la, sourciliers (fronto-sourciliers) ; 2, fncien ; 3, cer- 



vico-facien ; Sa, dorso-occipitien ; 4, thoraco-facien ; 5, dermo -hum^ricn ; 5«, portion 

 scapulaire ; 55, portion dorsale ; be, portion lat^rale ; hd, portion vcntrale ; be, der- 



m 



mo-coccygien. Excepting Sa, muscules or muscular slips corresponding to the abov 

 are shown in his dissection of Erinaceiis (Myologie, pis. Ixxiv. and Ixxv.). The names 

 of themselves sufficiently denote their situation. I may as well note that in the same 

 savant's drawings of Dasypus sexcinctus (I. c, pi. cclix.) nos. 3a, 4, 5, and be, are Icltend 

 accordingly. 

 Having in view, then, the determination of what cutaneous muscles obtain in the 



Three-handed Armadillo, as indicated by those of the struthious bird and the Insin Hvore, 

 I think we may correlate what has been denominated protractor of the Bcapulav sbuhl 

 with Cuvier's facien, cervico-facicn, and thoraco-fticicn divisions, and partially with the 

 so-called sterno-cervicalis and sterno-maxillaris of Apteryx, The protractor of Ihe firsl 

 movable zone appears to be homologous with the dcrmo-transversalis and dermo-spiiiah's 

 in the bird, and with the scapulaire portion of the dermo-hunn'iien in tl»c mammal; it 

 agrees also with Cuvier's " acromio-maxillaire." ' In the same way* the retractor of the 

 scapular shield in Tolijpeutes most nearly corresponds with " la portion dorsale du dermo- 

 humdricn," though evidently also combining regionally and functionally the avinc and 

 mammalian slips named in the preceding sentence. After what has been said, there is a 

 difficulty in ascribing the precise counterparts of the digitations to the movable zon cs 

 though these may bear a relation to exuberant quill-slips— to Owen's dcrmo-costalis, or 

 ofiPshoots of Cuvier's p. laterale ; at all events the zonal digitations (" striscie muscolari" 

 of Alessandrini) in Dasypus sexcinctus are the counterpart of the fascicles in Tolypa'tca. 

 With regard to the contractor of the scapulo-pelvic shields, it undoubtedly coincid 



its action, situation, and true homology, with the orbicular muscle of some authors m 

 the nedgehog, with Cuvier's main "portion laterale des muscles pcaucier^," in the sarao 

 animal ; and it moreover may include or be bound up with his " dcrmo-cocrygicn." In 

 some respects it answers to Owen's " dermo-iliacus " in the Apteryx, the derm o-co«= talis 

 being related thereto. Respecting the deeper envelope of feeble panniculus cainosus 

 in the Mataco, its throat-area, the strips to the fore limbs, the belly part, and that 

 to the groins agree in most particulars with what, in the struthious fom, is specified 

 as platysma myoides, constrictor colli, dermo-ulnaris, and dermo-humoralis ; it also 

 pertains distinctly to the « portion ventralc, laterale, dermo-humdricn, thoraco-facicn, 

 &c. in the Insectivore. 



' ' Myologie/ and ' Lesons/ 2nd ed. torn. iii. p. 594. * I^". "'• P- ^^• 



M 2 



