16 Another large carapace in which the lateral eyes appear more intra- 
marginal. Natural size 
17, 18 Chelicerae, probably according to their form and relative size those 
of a Hughmilleria. Natural size 
19 Portion of abdomen, retaining traces of longitudinal ornamentation 
resembling that of Hughmilleria shawangunk. Nat- 
ural size 
Hortzon and localities. Lower Siluric: Schenectady shale. The originals 
of figures 1-4, 6-8, 10-13, 15-18 are from the Dettbarn quarry at 
Schenectady, those of figures 5 and 19 from Duanesburg, that of 
figure g from Aqueduct, and that of figure 14 from Rotterdam Junc- 
tion, Schenectady co. 
All originals are in the State Museum 
611 
