ON THE ANATOMY OF THE CENTRAL NERVOUS 



SYSTEM OF THE NINE-BANDED ARMA- 



DIELO (TATU NOVEMCINCTUM LINN.). 1 



LILY C. SHUDDEMAGEN. 



The present paper is a contribution to the macroscopical anat- 

 omy of the brain, spinal cord, cranial and spinal nerves of the 

 nine-banded armadillo. 



There appears to be no literature on any portion of the central 

 nervous system except the brain in any edentate, with the exception 

 of Pouchet's classic account of Myrmecophaga ; with this omission 

 the relations of the spinal cord in this group are unknown, and 

 the present description of that organ complex is an attempt to 

 fill this hiatus in our knowledge. A list of the memoirs treating 

 of the anatomy of the brain is appended at the end of the present 

 paper; of those memoirs, the ones by Gervais (1869), Pouchet 

 (1869), and notably Smith (1899) are the most important. Smith 

 is the only writer who mentions the brain of the particular species 

 examined by me, but gives no figures of it ; and indeed, our 

 knowledge of the general anatomy of this species is much more 

 scant than of various other armadillos, even the rare Chlamy- 

 dophorus. 



Comparisons of the brain of this species are made with the 

 brains of other described Dasypodidse, and I have followed 

 Smith's nomenclature of the parts. 



The material used consisted of four specimens, two males and 

 two females, procured in the neighborhood of Austin, Travis 

 County, Texas. Two of these were preserved in formalin and 

 two in alcohol. 



This work has been done entirely under the direction of Prof. 

 Thos. H. Montgomery, Jr., and the writer is under great obli- 

 gation to him for his helpful suggestions, and kindly sympathy 

 and constant encouragement during the preparation of this 

 memoir. 



1 Contributions from the Zoological Laboratory of the University of Texas, No. 75. 



285 



