﻿DR. J. MURIE ON THE THREE-BANDED ARMADILLO. 119 



apical (capitular) recess. The long process curves round the tympanic ring. The 

 handle presents its thin edge to the tympanic membrane, and is bent sharply downwards 

 and obliquely forwards. The incus has a more bulbous body, its limbs wide apart ; the 

 stapes appears to be perforated. 



2. The Spine, Chest, and Felvis. 



According to my computation there are 7 cervical, 11 dorsal, 4 lumbar, 12 sacral, and 

 11 caudals in T. cotiurus,=3i total of 45 vertebrae. Prof. Giebel, in the same species, 

 mentions {I c. p. 102) that there are 7 to the neck, 14 to the back, of which 11 bear costjB 

 (dorsal), and 3 ribless (lumbar), 3 more, attached to the ilium; 3 free follow these, and 

 another 3 are attached to the ilium, behind which are 2 longer ones (in all 11 sacral), 

 followed by the encased tail-vertebrae, the numbef of which he does not state. The 

 subjoined footnote ^ contains Owen's annotations on the spine of T. tricinctus in tho 



^ Vertehrce and Pelvis. 



Atlas. — ** It has bo large transverse processes ; the sides of the vertehra appear to be truncate ; thoy present near 

 the hack part a rudiment of a parapophysis and diapophysis. The side of the vertebra is perforated anterior to them, 

 and leads to a canal which bifurcates, one branch terminating within the neural arch, above tho articulation for the 

 condyle, and the other perforating the neural arch. There is also a foramen at the back part of the htcmal arch, 

 above the articular surface for the odontoid. There is no spine either above or below the vertebral ring" (230S). 



Cervicah and Dorso-lumhar* — ^' The spine of the third cervical has completely coalesced with lluit of the dcntatu, 

 which is thick and high, but more extended forwards than backwards. The spine of tho foia"th cervical is applied 

 to its back part. The neural arches of the succeeding cervicals have no spines, but form thin transverse bars of 



fifth 



X 



are strongly bent backwards. Their bodies are extremely broad in proportion to their length or antcro-posterior 

 diameter. The articular bed for the head and tubercle of the 



first 



last cervical and first dorsal vertebra. Ten vertebrae show the impression of the articulation of the head of the ril» 

 in addition to the first dorsal ; and the neurapophyses of these eleven dorsal vertebra) are directly perforated by the 

 spinal nerves. The articulation for the last rib is as equally di\-ided between the two contiguous vertebra; as is 

 that of the first rib. The prominence supporting the articular surface for the head of the rib answers to thf 

 'parapophysis,' just as the prominence supporting the articulation for the tubercle of the rib repreBcnta tlic 

 'diapophysis.' The prominence in the first lumbar vertebra which articulates with the under part of the 

 anapophysis of the last dorsal, repeats or tallies with the prominence in that dorsal which articulates with the 

 bead of the last rib : it is therefore a ' parapophysis.' The dia])ophysis projects, as in the dorsal vertebra;, from 

 the upper and outer part of the base of the short and thick anapophysis; and this anapophysis presents, as in other 

 ArmadiHos, two articular surfaces, one above for the under part of the metapophysis, another below for the upper 

 part of the parapophysis. Thus the vertebrae are interlocked by tenon and mortice joints, as Cuvier has described ; 

 but it is by distinct parts of the vertebr^B from those which form the corresponding joints in the backbone of 

 serpents" (2297). 



Sacn 



sacrum 



same 



genus 



The anterior tuberosities of the iHa and the posterior tuberosities of the ischia are distinct epiphyses in this young 

 specimen ; the former are supported by the metapophyses of the first sacral veri^ebra, which also develops laterally t^\ •> 

 articular parapophyses. Ossification has not so far advanced as to unite the pubic bones together at the symphypi'^. 

 "The posterior sacral vei 

 Jiasyp^is " (2298). 



Caudals „„. 



Jynd of exostosis. The 

 which relates to thfi atf p 



rugous 



Metapophyses begin to be developed upon 



I 



