BOTHREMYDIDA;. 



in 



At the midline the hyoplastra are 77 mm. long. The usual thickness of the bones is 6 mm. 

 Laterally, each rises into a rather broad, but thin, axillary buttress. The bridge was probably 

 about 125 mm. long. 



The hypoplastrals are 87 mm. long at the midlin . The bridge portions of the bones are 

 mostly missing. There is no trace of the mesoplastrals, tho these doubtless were present. 



The xiphiplastrals extend 82 mm. along the midline. The notch in the rear is 90 mm. 

 wide. The borders of the hinder lobe are thin and acute. On the upper surface of the xiphi- 

 plastrals are the articular scars for the pubes and the ischia. The scars for the latter are 

 mammiform, 17 mm. long and 1 1 mm. wide, and are sharply ridged and cleft. The pubic 

 scars are somewhat elevated, 40 mm. long, 9 mm. wide, and rough. 



The arrangement of the scutes of the anterior lobe can not be wholly determined. On the 

 epiplastra appear a pair possibly coalesct at the midline, the gulars. There was probably an 

 intergular on the entoplastron. The sulci that separated the humerals from the pectorals is not 

 seen. The latter scutes crost the plastron about 18 mm. in front of the hyohypoplastral suture. 

 The abdominals are 40 mm. wide at the midline; the femorals, 90 mm.; the anals, 60 mm. 



Cope described limb bones which he regarded as two humeri and a small part of the prox- 

 imal end of femur, but it is quite certain that what he called humeri are femora. The right 

 femur lacks the fibular process and the distal end. Of the left femur there is the distal end. 

 These bones agree closely with those of Hydromedusa, except that the tibial process extends 

 down farther on the shaft. Cope estimates from these bones that the length was 97 mm. It 

 was probably 10 mm. shorter. What seems to be the head of a humerus is too imperfect for 

 definite conclusions. 



FlG. 103. Taphrosphys leslianus. Anterior half of carapace of type. Xj. Known bones 



shown by stippled areas. 



Taphrosphys leslianus Cope. 



Text-figs. 103-106. 



Taphrosphys leslianus, COPE, Ext. Batrach., Reptilia, Aves N. A., 1870, pp. 159, 166; Vert. Cret. Form. 



West, 1875, p. 264. HAY, Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 438. 

 Prochonias leslianus, COPE, Ext. Batrach., etc., p. 165, line 14. 



The present species is, up to this time, known from only a single specimen, Cope's type, 

 No. 1467, of the American Museum of Natural History. This specimen has not, until this 

 time, been figured. In his description of the specimen Cope did not state the locality or the 

 level from which it had been derived; but his label accompanying the specimen informs us that 

 it was found at Hornersville, New Jersey. This is in Monmouth County. In his Cretaceous 

 Vertebrata, page 264, he informs us that it belongs to "Greensand No. 5;" so called because 

 he regarded the uppermost bed of Cretaceous greensand as representing the Fox Hills group. 



The type specimen consists of the left side of the nuchal, the first and second left periph- 

 erals, a posterior peripheral, a part of both costals of the first pair, the whole of the third 



