Bull. U. S. F. C. 1895. The American Lobster. (To face page 100.) 
Plate D. 
Cut 12. — First left pereiopod of adult lobster, seen from in 
front, showing anterior border at base of limb. Two- 
thirds natural size. 
a, b, constrictions in cuticle of third joint, c, oblique 
linear impression upon upper surface of second joint. 
x, plane of fracture. 1-5, segments of limb. 
Cut 13. — Basal portion of first left pereiopod of adult lobster from under side. Two 
thirds natural size. 
a , b , grooves on surface of third joint external to x. Bt\ podobranchia. x. plane 
of fracture, i/, spur of second joint. 1-6', segments of appendage. 
Cut 14.— Second left pereiopod of female, 10 inches long, seen from under side. 
Two-tliirds natural side. 
constriction upon second joint immediately in front of x. Br , podobran- 
chia. x , articulation between second and third joints, corresponding to plane 
of fracture in cuts 12 and 13. y, spur on second joint. 
Drawn by F. H. Herrick. 
