SYSTEMATIC REVISION 59 



the episternum. ^ Scapula with a proscapular lamina. Ribs transversely- 

 expanded, not united by suture with each other, alternating with the dermal 

 bands. Limbs well developed." 



In the paper in the American Philosophical Society "Proceedings" 

 Cope gives a slightly different analysis of the characters of the two genera: 



"Mandible articulated much anterior to cranial border; nostrils opening 



vertically Otoccelous Cope 



Mandible articulated posteriorly and on line of the posterior border of 



the skull; nostrils opening horizontally Conodectes Cope" 



Otoccelus mimeticus Cope. 

 Am. Nat., vol. xxx, 1896, p. 399; Proc. Am. Phil. See, vol. xxxv, 1896. p. 128. 



Type: A skull with the lower jaw in place, which is connected by a band 

 of matrix to a carapace and some of the limb bones. No. 4376 Am. Mus. 

 Nat. Hist. Cope Coll. From Texas. 



Original description: "The skull is short and wide. The superior sur- 

 face is nearly flat from the posterior border to between the nostrils. The 

 muzzle does not project beyond the mouth border. The orbits and nos- 

 trils are not superior in direction, although the superior, orbital border is 

 excavated. The nostrils are directed forwards and a little laterally; they 

 are separated by a space equal to the transverse diameter of each. The 

 auricular meatus is large and is directed outwards and not upwards. The 

 posterior hooks of the quadrate project on each side beyond the slightly 

 concave posterior border of the cranial table. Interorbilal region flat, con- 

 siderably wider than the diameter of the orbit. 



"The carapace commences at a point about as far posterior to the skull 

 as the posterior border of the latter is behind the orbits. The anterior band 

 has an obtuse, anterior border like that of the anterior border of the cara- 

 pace of the armadillo. The bands are gently convex from side to side, and 

 they become narrower anteroposteriorly as we pass backwards. The state 

 of the specimen is such that neither the ribs nor the vertebrae can be dis- 

 covered. 



"As compared with 0. testudineus the following differences appear: 

 The table of the skull projects beyond the posterior hook of the quadrate 

 in the former; not so far in the latter. The auricular meatus and the orbit 

 present more laterally in the 0. mimeticus, more vertically in the 0. testu- 

 dineus. The size of the two species is not very different. 



"Measurements. m 



"Length of the skull on the middle line 0.120 



Width of the skull at the posterior border of the orbits 090 



Width of the skull between the orbits 038 



Width of the skull between the nostrils 022 



Length of the skull (median) to anterior border of the orbits 078 



Distance from skull to carapace 065 



Length of thirteen carapacial bands ISS 



Anteroposterior diameter of the first band 017 



Anteroposterior diameter of the seventh band 012 " 



Otoccelus testudineus Cope. 

 Am, Nat., vol. xxx, 1896, p. 399; Proc. Am. Phil. Soc, vol. xxxv, 1896, p. 124. 



Type: The same as the genus. 



Original description: This is given under the description of the genus 

 Dissorhophus. 



