Wy) 
Mf 
wi 
Mn 
S\ RN Wi 
= 
{ 
Wes 
Sa 
ANA 
ANN > 
} 
a . \' 
= tN MY 
Foe gi 
em 
ES 
AW 
om Z 
WNW eo AE? 
X Wy, Neg SOE. Bip) 
‘ lk (ae LLL, Soph 
; 
AD 
Yi 
\ EZ 
WS 
MS S SK Mt Y 
SH K\ PUK 
WG vi) i 
SRS iN 1 
SQ FN ni Ie A 
aes UH Ke Yer, fy y 
WSs EZ}! i Wa sf 
ZY GFP io 
Fig. 1.— Outline of the under side of the dorsal shell of Asaphus megistos, with the fragment. of the Ohio trilobite, showing the legs, 
resting in it. H, hypostoma; D, doublure or infolded margin of the dorsal shell; D’, same of the thoracic segments ; D"7, same 
of pygidium; @, portion of posterior pair of cephalic appendages; A, abdominal appendages; 2B, branchial filaments. The 
latter are enlarged to show their position. 
ee Te 
