352 KANSAS UNIVERSITY SCIENCE BULLETIN. 
carpus is unossified and the cartilage has left no impression 
on the stone. 
The right hand has two metacarpals preserved, which are 
fully one-half as long as the radius and ulna. They are sepa- 
rated some little distance from the ends of these elements. 
This may be due to post-mortem shifting, though the carpus 
was undoubtedly broad. On the left side are preserved a por- 
tion of the humerus, the radius and the ulna, with three meta- 
carpals lying next to the vertebral column. The carpal space 
is not so large on the left as on the right side. The ventral 
armature is well preserved in a narrow patch about one inch 
in length. The chevron-shaped rods are quite large, there 
being two of them in one millimeter. 
The type specimen is No. 796 of Yale University Museum. 
Collected in 1871, at Mazon Creek, Illinois. 
MEASUREMENTS OF THE TYPE OF CEPHALERPETON VENTRIARMATUM Moopis. 
mm. 
Pntines lene thwotet Ossie eerily erie tl 98 
Wenethoresklligey rere ei elect keenee a 22 
Widthieacross) base rOLeSKanl eran ieruttsteiettle tere rtier 28 
long diameter of the eye...........:.....--.---- 10.5 
Transverse diameter of the eye.............----- 8 
Ibearerfordeynel SEXES 5 s50nonnodgagunosvanosoOauSoDGs 4 
Iberayeidey se Tab -5ococcconccgsosadceoo0dadue 26 
Depth of mandible at the coronoidal region........ 3.5 
WYSHAN Gre Claniehays onoooscocoocodsuccdeaoacocbodr 2 
Leneth of a long tooth ~.-.---..-....--- 32. eee 2 
Diameter of long tooth at base...........-.--.-.-- a) 
Length of vertebral column preserved...........-- 64 
Length of a centrum...........-------------++s- 3 
Median width) of Centruni: jj. le ite iterate elit 1.5 
IGG Gs Tle G S5cecna0dbocncoeooessdcnouLGUEsSe 6.5 
Wiviekin Ge alo Gin beSOssonncoocoeuoboonecnSopcooor .33 
Tength Of Coracoid! 7y-(o. ee ier iets oe]-p-)-sol-lone stole 8 
Width of coracoid at anterior end............---- 2.5 
Length of humerus .......-.+--2-- ese ese ee eee eee 18 
Wad bhimofeasheatterstrcteie cin eiertieteietletieitetelartet- ir il 1 
Distal width of humerus...............-----«---= 4 
Length of radius or ulma..............--+--+++-- 10.5 
Width across proximal ends of ulna and radius.... 3 
Length of carpal space..........--++sseseeeeeeees 5 
Length of metacarpal ............--.+-+-22e0s- 6 
Length of ventral armature preserved.........--- 24 
Number of rods in a length of 5 mm.............- 10 
