CHRYSOPTERON BARTELSII. 75 
nearly of double the size in vertical extent if compared 
with the second lower premolar. Lower incisors very much 
erowded and so imbricated that it is very difficult to count 
from without the cusps on them; after having removed, 
for better comparison, the skulls from Bartelsii and Weberi, 
I see that what seemed to be, seen from without when 
the Weberi-specimen was in the flesh, three cusps in reality 
is four cusps, and that not only the middle lower incisors 
in both species have four cusps, but also the second ones, 
meanwhile the third pair (placed near the canines) present 
two anterior cusps beside a smaller cusp more inwards 
(not to be seen from without). 
Some measurements of the type-specimens of Bartels 
and Weberi, in millimeters: 
BartelstiQ. Weberi 4. 
VMR ENE te) eae Va, ee EE 43 42.5 
ETE EE ALE ME DP 20 16.5 
BERGUM Wen oe Ot den ak a ok 10 9 
GTE ON Soule Oe Oh EN a 53 49 ') 
second finger, metacarp. .. . o1 46.5 
= FS 1st phalanx . . . 5 3.5 
third finger, metacarp . .. . 53 41.5 
a 1 phalaps nr. 22 20 
5 A aS os 15 14 
ee 4 aid phalanx . .. . 5.5 5.5 
fourth finger, metacarp. .. . 50 43 
3 J Tet (phatae or 2. 14 13.5 
7 A 2o¢ phalanx J. -. 14 th 
fifth finger, metacarp. ... . . 49 44 
je EE Co OEE DAP ene 13 12 
Re 4 0 ES ro se 10 9.5 
OUDEN IE aa ie oe |G rik 4 27 25 
LDL RS NE ae MeT ee 12 12 
CAlCAMCUIE- age a ige er ec ata Lee 16 14 
1) zot 59 mm. as in Weber’s „Ergebnisse”. 
Notes from the Leyden Museum, Vol. XXXII, 
