EXPLANATION OF PLATES 
PLATE ı. Natural size. 
FiG. 1. Outline of side vie 
Fic. 2. 
F 

Outline of front view of sec sction deis middle of oe 
G. 3, Restoration of 4 rcheoplax signifera, dorsal 
PLATE 2. $ natural size. 
Fic. 1. Ventral view, sternum and i joints of = leg (B. S. N. H. no. 12,946). 
Fic. 2. Last four joints of one of the walkin legs (B. "n N. H. no. 12,944). 
Fic. 3 olor pattern of one side of Pa ( 
Fic. : 
S.N. 12,969). X 21. 
Fic, 5 ecimen vies open showing antennules, plates of interior, and double triangular 
plate (B. S. N. H. no. 12,945). 
IG. 6. aic re from ventra 
Fic. 7. Portion of hand and finger with teeth (B. S. kg H. no. 12,941). 
1 ortion of two digne ie broken (B. S. N. H no. 12,942). 
*9. Ventral vie stern abdomen, maxilliped, basal joints of legs and portion of 
2 (M.C.Z 
FIG. 10 Abdomen of female (B H.n 940). 
Fic. r1. Specimen showing FERN eke. (B. S. N. H. no. 12,943). 
Fic. 12. Outer maxilliped of right side (B. S. N. H. nO. 12,947). 
Fic. 13. Outline of section of one of the rear 
Fic. 14. 
ancer proavitus, oo. »f abdomen, sternum, maxilliped, and basal joints of two 
legs (H. S. N. H. no. 12,970). 
