54 



Thickness of tlie short ciauiul crest seiKiratiiii;- the temporal l'oss;i' poste- 

 riorly 3 i"*^li 



Breadth of temiioral foss;e from the occipital border to the end of the i)OSt- 



orbital process 9 inches. 



Vertical extent in advance of zygomatic root •. 5 inches. 



lireadth of cranium outside of zygomata 11 inches. 



Height of occiput . . 53 inclaes. 



Breadth of occiput at post-tympanic processes (ii inches. 



Breadth of cranium at ends of post-glenoid processes 8 inches. 



Transverse diameter of occipital foramen ; . . 23 lines. 



Vertical diameter of occipital foramen, estimated ■. IG lines. 



Breadth at occipital condyles together 47 lines. 



Depth of occipital condyles IS linos. 



Breadth of occii)ital condyles 19 Hues. 



Width of basi-occipital at anterior condyloid foramiua. 18 lines. 



Width of basi-occipital at conjunction with basisphenoid 15 Hues. 



Distauce between glenoid articular surfaces 51 lines. 



An upper-jaw fragment, from the same individual as the cranium just 

 described, contains the last two molars, of wliicli the pemdtimatc one is re[)- 

 resented in Fig. 3, Plate XXIV. This tooth closely resembles the corre- 

 sponding one of the same species represented in Fig. 10, Plate XXIII, and 

 also that of Paloiosijops paludosus as represented in Figs. 3 to 5, Plate IV, and 

 Fig. 9, Plate V. The last molar, as fai* as it is preserved, likewise resembles 

 the corresponding tooth represented in the same places. The inner part of 

 the crown presents a single conical lobe. 



The infVa-or])ital Ijorder forms a thick, obtusely rounded ledge projecting 

 obliquely forward on the face. In Palaosyops faludomH the corresponding 

 ridge presents an acute anterior edge defining it from the facial surface beneath. 

 The outer ])art of the thick infra-orbital ridge rises in a short, l)lunt, conical emi- 

 nence or postorbital process. The orbital floor is concavely depressed within 

 the prominent margin, and forms a long, triangular platform terminating 

 beiiind in the thick posterior boundary of the maxilla. 



The measurements of the specimen are as follows: 



Lines. 



Space occupied by the last two molars 32 



Breadth of second molar • 20 



Width of second molar 20 



Height of anterior orbital margin from the molars 20 



Fragments of both sides of the lower jaw with all the teeth broken away, 



except portions of the last molars, also accompany the preceding sjiecimens. 



The best preserved fragment partially restored from the corresponding ]>or- 



li(ni of the opposite side is represented in Fig. 4, Plate XXIV. It agrees in 



T 



