Quart Sourn. Mior’ Sei, We 38 NSP 9, 
fig. 46. 
Water vascelar Ring 
‘ 
--Dorsat Organ ‘ Ea Be a Dorsal Sac 
=e Water-pore -- 
Dorsad Sac 
cone Dorsak Mesentery 
Boa eer Lett Body-cavety ... 
~~ Anus 
Fig. #8. 
Dorsal Orgaw 
a Dorsad Sao 
Lig. 49. Lug. 50. 
HC ONE SIAL OA, Dorsat Organ. 
Dorsal Sae 
RB.C.--. 
Lett Body -caevity 
Asophagus 
LBC. 
HB del 
ury de) F Huth, Lith? Edin® 
