of the Chlamyphorus truncalus, 547 



the sacrum, immediately under the superior projection, made 

 evident bj the corresponding depression in the investing muscle 

 of that part. These globular bags were lined with a secreting 

 surface, but having suffered some mutilation in removal, the 

 mode by which the secretion passed, or its particular use, could 

 not be ascertained ; they are probably analogous to the well 

 known anal glands of various other quadrupeds. 



The sex was evident from the penis remaining attached to 

 one edge of the divided abdominal muscles ; and lying quite 

 loose in the cavity of the abdomen, was found one of the testes, 

 but whether its original situation had been internal or external 

 to the parietes could not be ascertained. The penis itself was 

 large compared to the size of the animal, and one inch and one- 

 eighth in length. The confined situation of the female sexual 

 organ probably renders such a provision necessary, the truncated 

 portion of the coat of mail covering the whole of the posterior 

 extremity. 



The coat of mail is covered on the inside by a tough skin, to 

 which it adheres closely throughout its whole surface, with the 

 exception of the truncated extremity of the animal, over which 

 it is more or less free. This lining membrane connects the va- 

 rious rows of parallel plates, but these rows in the specimen 

 belonging to the Zoological Society, are not separated so widely 

 as the representation of the animal described by Dr. Harlan 

 would seem to indicate. In the example before me, the ante- 

 rior edge of each row of plates extending from side to side over 

 the back, is inserted underneath the posterior edge of each pre- 

 ceding row of plates, and the advantage of such an arrangement 

 to an animal forcing its passage through subterranean apertures, 

 will be sufficiently obvious. 



The eye is small ; the tongue long, conical, and covered with 

 papillae ; the parotid glands very large. The muscles of the jaw 

 smaller in proportion than those of the other parts of the body. 



The form of the head presents the figure of an irregular cone, 



the base of which is turned toward the spine ; the cranium does 



not exhibit any sutures ; the cavity capacious ; the frontal bone 



supporting two rounded processes projecting upwards and some- 



2 M 2 



