Fig. 4. Specimen 238. Part of a thorax and pygidium, seen from the ventral side. The series of heavy segments shown in the upper part do not belong to one appendage, but are the distal ends of several endopodites. See also text [fig. 46] for a drawing of this specimen. × 18.
Fig. 5. Specimen 237. Pygidium and part of the thorax, with some of the appendages. × 11.
PLATE VIII.
HELIOTYPE CO. BOSTON