Hughmilleria socialis Sarle 
Page 335 
See plates 46, fig. 15; 59, 61-63 
1-6 Series of carapaces of individuals of various ages showing slight varia- 
tions in outline and in the size and position of the compound eyes. 
Natural size 
7 «\ laterally compressed carapace showing the form of the compound eye. 
Natural size 
8 Dorsal view of average individual showing the ocellar mound, one walk- 
ing leg and the surface sculpture. Natural size 
9g Dorsal view of well preserved specimen showing the normal outline of 
the body, the swimming legs and form of segments 
1o Ventral view of specimen. This retains the extended right preoral 
appendage, three walking legs with their coxal joints in position, the 
mouth, the metastoma, the coxal joints of the swimming legs with 
their gnathobases, the left swimming leg, male opercular appendage 
and the imbricating surface scales. The postlateral lobes of the first 
postabdominal segment are also well shown. Natural size 
Horizon and locality. Pittsford shale. Pittsford, Monroe co., N. Y. 
The originals of figures 1-5, 8-10 are cotypes. The originals of all figures 
are in the State Museum 
560 
