\ MK-MOlli Ul’ON THE GENUS 
. will sl.ow the .lixtrllmtioll of the .pecies in this 
'ul.f'.ii.ilv’. A» lilt a» poanihle it has heeii arranged phylogenetically, ami itartially 
rlin>i»)l(t}rifall\ . ^ — 
».W»UKil<'AI. U1.-T1£I»ITK)X OF 
SI-KClK-s. 
KOCKNE. 
TiiaixHlKTiuiii 
(llaiiUnHloti) 
l»i|*l»niiloii rinliu* 
T<-liiuiU>iiiiTiiiiii liyiv'iii'liiit* 
Ti-liiuil<>lli<'riiini vmIuIiik 
T<- liiuiii>tliiTitiiii mllridfiif 
l.liiiiioliyoi* fiuiiiiuilix 
IJmimliy<>|* Inli'vini 
|*B|jr<Myu|w liiiiitinwlrii*' 
l*nlir<«yo|ai minor 
|‘nUt'<«yo|a< vnlli<l<'m> 
l‘■li«'■«yo|l)■ iiHtnirliiiiiix 
I'lilAafaiyoiiii lii-viil<-iiK 
l‘HlMaiaiyo|Bi |ialll<l< xll* 
l*iilM'<»iyo|w iMinitliN 
IdUiilHloilirrium |Mi|H<i)(ifiiiii 
laimiMloilKTiiim’' 
Bridger 
MIOCENE. 
CL.\SSI FI CATION. 
I li*> «liiMM»v«*rv hy M. Filliol ol the relations of Chalicothermm to Macrotherium 
liax iiiade an «'ntin* muTaiifreiiient ol this family necessary, so that a new family 
name must U- applied to the frrouj) including the genus Palccosyops ‘aw^S. allied genera. 
I»n.r.-ss<.r ('o|H'' has taken this op|M)rtunity toprojiose that Chalicotherium he placed 
in a new order entitled the Ancylopoda, and has likewise instituted a new family 
name Ihr PaUosyops and allied genera— namely, the Lambdotheriidcr this is derived- 
In.m Ins g,.„ns Lambdothcrium,^ which was described a long time after Paiteosyops^ 
nil I MS n In Is*id\. I accoiilinglj- cannot accept Cope’s jiroposed name for this 
lanniy. as the family name of a gi-oup must, according to the rules of nomenclature, 
iM. . erivisl In.m the oldest generic name, that is to say from Pcdceosyops, which 
would give ns the name Palccosyopidcc for this fomily. I find in looking over 
n>is.n>r o|H s ^alious pa{K‘i-s from 1879 - 87 , upon the arrangement of the fiimi- 
'Ain. Xni., Mnn’li IKSft, p. 152 . 
•Am. Xnl., l.SSO. 7ia. 
•lUydenV. P„.|im. Up,, of Gih,I. .s„rv. of Montana, 1872, p. 358. 
