﻿DR. J. MURIE ON THE THREE-BANDED ARMADILLO. 95 



of the parotid gland, crosses the masseter about its middle. The hypoglossal nerve goes 

 in front of the stylohyoid muscle, and enters the root of the tongue, where the hyo- 

 glossus and geniohyoglossus muscles meet. The lingual nerve pursues its course iu 

 advance of the hypoglossal. 



F 



Notwithstanding abbreviation and thorough anchylosis of some of the neck-vertebra, 

 the ordinary number of the cervical nerves obtains. The 1st nerve appears to issue from 

 the foramen on the outside of the atlas, and to be distributed to the muscular tissues 

 hard by. The 2nd, 3rd, and 4th nerves are united separately from as many foramina in 

 the coalesced trivertebral axial division. The fourth nerve is much thicker than the two 

 preceding ; and the three together constitute the cervical plexus, the first being apart, as 



in Chlamydophorus truncatus. 



The brachial plexus is formed by the 5th to 8th nerves inclusive, and a com- 

 municating branch from the fourth. The long thoracic is only partially derived from 



the fifth. The median and the ulnar nerves are each a thick cord ; and the latter passes 

 through the internal condyloid foramen. At the sole of the foot the radial nerve is 

 large, intimately adherent, and partially distributed to the palmar fascia as well as 

 muscles. The increase of neurotic power concomitant with thickness of cord doubtless 

 contributes to and has considerable influence on the tension of the ^reat nail-borne foot. 



Of the lumbar and sacral plexus, I noted that the crural or femoral trunk cnmc chiefly 

 from the foramina between the second and third lumbar vertebra?, entirely posterior, 

 therefore to the quadratus lumborum muscle, but anterior to the ilium, and outside the 

 peculiar long lumbo-iliac (psoas) ligament. The femoral nerve lies on the surface of the 

 ilio-psoas muscle, and, in company with but exteriorly to the femoral artery, proceeds to 

 the groin. What answers to the obturator nerve is made up of branches from the 3rd and 

 4th lumbar nerves. It lies to the inside of the psoas parvus and close to the synchon- 

 drosis, passes just inside the pelvic brim, and escapes posteriorly through the obturator 



foramen . 



The most notable of the nerves composing the sacral plexus are those constituting the 

 ischiatic— the remaining posterior branches being diminutive, covered by and supplying 

 the infracaudal muscles. The pair of largest cords contributing to the great sciatic 

 emerge from the foramina just within the pelvic basin. 



YI. MroLOGY. 



In comparing the muscular structure of the present form with others of the Armadillo 

 tribe, I shall have occasion more especially to cite the annexed authorities, with recourse 



and affain to writings on allied Edentata &c. in illustration of points at 



^«,i^ ^jyj ,»xj.l,^^j- 



1. ' Eecuen de Planches de Myologie,' Cuvier et Laurillard, « Tatou ft six bandes 



pis. 259, 260. 



2. « Hunterian Lectures ' bv Huxley, 1865. Abstract Med. Times and Gaz. ITis MS. 

 of Lects. 8 & 9, however, containing notes of dissection of Basypus Q-cinctus, he has 

 kindly placed at my disposal. 



3. « The Muscles of the Pore and Hind Limb in B. 6-cmclusr Galtoii, Trans. Lmn. Soc. 

 vol. xxvi. 



