BOTHREMYDID^E. 



123 



Henry B. Kiimmel. These hones had lain for many years in the basement of the capitol and 

 all knowledge of their origin had been lost. Without doubt, they had been obtained from the 

 Upper Cretaceous greensand of New Jersey. 



Of this individual there are large portions preserved, but there are so many parts missing 

 that the shell can be only partially restored. Of the carapace there were secured a considerable 

 part of the anterior and posterior free borders and some fragments of costals. Of the plastron 

 some important parts can be identified. The individual is estimated to have had a carapace 

 about 700 mm. long. 



Most of the nuchal bone is present (fig. 125), but, on account of the absence of a section of 

 it, its exact width can not be determined. It was not far from 120 mm. The hinder portion is 

 missing. The thickness near the midline in front is 13 mm.; backward the bone thins to 

 6 mm., while at its outer ends it is 18 mm. thick. The whole free edge is obtuse. The first 

 peripheral (fig. 125) has a length along the free border of 83 mm., a fore-and-aft extent of 

 65 mm. The thickness at the suture with the second peripheral is 24 mm.; at the suture 

 with the first costal, 8 mm. The second peripheral (fig. 125) extends 90 mm. along the free 

 border; 70 mm. fore and aft; and is 26 mm. thick where it joined the third. Its hinder 

 border somewhat overlapt the first costal. 



130. 



127. 



129. 



FIGS. 125-130. Amblypeza entellus. Portions of the type in State collection of New Jersey. 



125. Nuchal and anterior peripherals of type. Xj. 117. Section along intermarginal sulcus of peripheral 



nu.p, nuchal plate; nu.s, nuchal scute; per.i, of fig. 126. Xj. 



first peripheral. 128. Hinder peripheral. Xj. 



126. Hinder peripherals (7? and 8. ? )of left sideof type. X}. 129. Section of peripheral of fig. 128. X|. 



130. Inner surface of fifth costal. Xj. Shows surface for inguinal buttress. 



The peripherals behind the bridges were larger and thicker than those in front. One 

 whole one and portions of two others are present. The free borders of these are thickened and 

 very obtuse, thus contrasting strongly with the corresponding bones of Taphrosphys. The 

 exact positions of these posterior peripherals can not be made out. Fig. 126 represents portions 

 of two; and from the thickness of the bone at the left hand, 27 mm., and the height of the 

 costo-marginal sulcus, that peripheral is believed to belong not far from the inguinal notch, 

 being possibly the left eighth. Fig. 127 is a section taken along the intermarginal sulcus. The 

 upper surface is convex in all directions. On the under side the horn-covered surface rose 

 above the free border about 45 mm., descending somewhat backward. Fig. 128 represents a 

 complete peripheral, probably the tenth of the right side; fig. 129 is a section of the anterior 

 end. It measures 104 mm. along the free border and is 104 mm. high. The thickness near the 

 lower border is 21 mm.; at the upper border, 13 mm. On the visceral side the surface covered 

 with horn is 40 mm. wide anteriorly, but toward the hinder end is only 15 mm. wide. The free 

 border is very obtuse. 



A fragment of a costal has a length of 130 mm., a width of 77 mm., and a thickness of 

 15 mm. at the sutural border, 20 mm. through the rib. Another fragment is part of the fifth 



