* | « - 
30 aie 
thy, 
of Ohio. We have alae seen a number of specir 1ét 
from that statéy which could not be distinguished 
‘from the Dudley trilobite. “Our. model wa 
from a specimen on renton Falls, in a Hou 
of New York. 
The three following species found in the Daina 
States, will no doubt be considered by many as mere 
varieties of the C. Blumenbachiis; we have ventured, — 
however, to call them by distinct names. Ses gga 
CaLYMENE CaLticepHaLa.* Green. Cast No. 2. 
Clypeo antice attenuato, figura liliiformi in fronte 
- depicta; oculis minimis; abdomine quatuordecim ar- 
ticuliss corpore plano. | 4 
dcolioggerpore, piano... i clon ia 
The buckler is subtriangular; on the front there is 
a figure in high relief, somewhat resembling a freur 
de lis, or perhaps more, the capital of a Bi genie 
Pe . ene oculifer “ous tubercles are rather low 
down on the cheeks than usual. The. articulation ¥ 
of the abdo: en and the tail cannot well be distin- 
guished from each others; fourteen in all may be 
easily counted. The middle lobe of the abdomen is 
arly equal in breadth throughout. The ribs, or 
_costal arches, are not grooved or bifurcated at their 
extremities. Length nearly two inches and a half. 
This. beautiful species is in the ‘Philadelphia Mu- 
é me. it ee as hidtec’. foune in “ Hae 
tle 
spi hg 
