ON THE GAMPSONYCHIDZ. $33 
scended from Acanthotelson, which is thus a truly synthetie form, standing in ananeestral relation 
to all the Thoracostraca, while it also suggests that the sessile-eyed and stalked-eyed Crustacea 
may have had a common parentage. 
Explanation of Plate III." 
Fig. 1. Palwocaris typus, M. & W. restored, enlarged four times. (The front of the head is partly conjectural 
and though stalked eyes probably existed, no attempt Las been made to restore them. ) 
Fig. 2. Palwocaris typus, seven thoracic segments, showing the disposition of the endopodites, x8 (Lacoe’s 404D). 
Fig. 3. Palewocaris typus, dorsal view of one side of three thoracic segments, showing the basal joints of the en- 
dopodites (endop), and exopodites (erop), enlarged. 
