. Bulletin - United States National Museum. Science. 150 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM MALES 1. Apical spines of left fifth leg obtuse; hand of chela on right leg with a single laminate process between bases of thumb and finger lobiancoi (p. 154) Apical spines of left leg acuminate; hand of chela with 2 processes between the bases of thumb and finger 2 2. End segment of left fifth leg with 2 equal apical spines, 2 on outer margin, and rows of long hairs on posterior surface- securifer (p. 151) End segment of left fifth leg with 1 large apical spine, 2 much smaller ones at its ba
. Bulletin - United States National Museum. Science. 150 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM MALES 1. Apical spines of left fifth leg obtuse; hand of chela on right leg with a single laminate process between bases of thumb and finger lobiancoi (p. 154) Apical spines of left leg acuminate; hand of chela with 2 processes between the bases of thumb and finger 2 2. End segment of left fifth leg with 2 equal apical spines, 2 on outer margin, and rows of long hairs on posterior surface- securifer (p. 151) End segment of left fifth leg with 1 large apical spine, 2 much smaller ones at its base and no rows of hairs 3 3. Second basipod of right leg as long as hand of chela; finger just meeting tip of thumb meadii (p. 153) Second basipod of right leg much shorter than hand of chela; finger extending considerably beyond tip of thumb pennata (p. 150) PONTELLA PENNATA Wilson Figure 101 Pontella pennata Wilson, Proc. U. S. Nat. Mus., vol. 80, art. 15, p. 27, pi. 1, 1932. Occurrence.—One female in surface tow, ' Vineyard Sound, August, 1881; 10 males and females in Great Harbor, "Woods Hole, by V. N. Edwards, September, 1887. Distribution.—Chesapeake Bay (Wilson); Woods Hole Harbor (Fish). Color.—Body fairly transparent and deep blue with a greenish tinge, the color darker at the joints of the appendages, especially those of the fifth legs in the male, and in the grooves between the body segments. The swollen middle section of the grasping an- b tennae of the male also shows the same dark- FiGDRE 101.—Pontella pen- bluC Color. TegTUaie'^fi'fi'egs""' Femalc-Bodij stout and cylindrical; left posterior lobe of the fifth segment larger than the right; dorsal surface of the genital segment with a chitin outgrowth on either side of the mid line, which passes forward onto the dorsal surface of the thorax, and from the right one a ragged streamer as Jong as the entire body extends backward; urosome 2-seg- mented and very short; caudal rami symmetrical; fift
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