108 SMITHSONIAN MISCELLANEOUS COLLECTIONS 
[vot. 48 
II. ARRANGEMENT BY AVERAGE OF RELATIVE BRAIN WEIGHY. 
MAMMALS. 
Proportion of 
Brain to Body. 
Species. Ss 
Fancy mice, 22 
Blarina brevicauda, 23 
Marmosets, 26 
White mouse, 28 
Cynopithecus niger, Ps 
Sciuropterus volans, 32 
Geomys bursarius, gS a 38 
Black and white fancymouse 38 a@ 38 
Sciurus hudsonicus, BD ys 
Mus musculus, gO a 30 
Arvicola agrestis, 47 @ 47 
Cercopithecus callitr., SOY DAS O 
Potos caudivolvulus, ihe OS 
Phoca vitulina, Ey eke) 
Mephitis mephitica, 58 a 58 
Sciurus carolin, G2 aah2 
Sciurus rufiventer, O05; a8 
Species. 
Sciurus rufiventer 
Macacus fascicul, 
Mus rattus, 
Procyon cancriv, 
Myoprocta acouchy, 
Dasyurus macul, 
Lemur macaco, 
Felis onca, 
Black and Tan Dog, 
Maltese cat, 
Dasyprocta aguti, 
Nasua rufa, 
Cavia cutleri, 
Lynx rufus, 
Canis mesomelas, 
Fox Terrier Dog, 
Putorius putor, 
Helarctos malay, 
Irish Terrier Dog, 
Wild Rabbit, 
Erinaceus europ., 
Procyon lotor, 
Retriever Dog, 
Capreolus caprea, 
Domestic Rabbit, 
Felis pardalis, 
Cervus dama, 
Trichosurus vulpec., 
Tayarsu tajac., 
Hystrix cristata, 
Mus norvegicus, 
Felis serval, 
Lynx canad., 
Fiber zibeth., 
Belgian Hare, 
Proportion of 
Brain to Body. 
ves igavcn 
DLO gas St ene ey 
d 70 
é WI 
07) "an Om 
Cas 
78 «a 7 
7S 78 
LPIA YS 
83 @ 79 
6 87 
87, =a nS 
b 99.5 
87 a SF 
88.5a 81 
6 096 
$9 a 89 
go a 90 
O93. a 03 
97 a 64 
b 73 
EIUTS 
ad 79 
e 94 
J 103 
ie TED 
h i112 
z 161 
98 a 98 
TOL, VQ TOD 
Tog @ 100 
6 118 
TIO. 2 Ito 
Ly ae aA ANG? 
7370 =a@ 130 
197, a ae 
b 143 
140 a 140 
I4mt @ IAI 
145° @ 145 
I50 @ 149 
& 151 
C51 WO 150 
164 a 164 
166 a 166 
Te eee 
IQ¢4  @ 194 
197 & 197 
209 @ 209 
210 a 210 
215 a 215 
2a a2 2s 
231.5 &@ 193 
6 201 
c¢ 202 
ad 205 
e 224 
f 246 
