ISOPODS OF NORTH AMERICA. 



263 



FIG. 275. LIVONECA REDMANNIT a, MAXIL- 



LIFED OP FEMALE. X 39. 6, SECOND MAXILLA. 



x 20|. c, SEVENTH LEG. x 7. d, FIRST MAX- 

 ILLA, x 39. e, PALP OF MANDIBLE, x 20. 



The abdomen at its base is not abruptly narrower than the thorax. 

 It tapers to a narrower extremity. The tirst segment is as wide as the 

 seventh thoracic segment and is 

 partly covered b}' it. The sixth 

 or terminal segment* is rounded 

 posteriorly; it is 6 mm. long and 8 

 mm. wide at the base. The urop- 

 oda are much longer than the 

 terminal abdominal segment and 

 extend some distance (2 mm.) be- 

 yond its extremity. The outer 

 branch is longer and narrower 

 than the inner branch and has the 

 posterior extremity rounded. The 

 inner branch is broad at its pos- 

 terior end, which is obliquely trun- 

 cate, with the outer post-lateral 

 angle produced in a rounded lobe, 

 the inner angle being obtuse. 



The legs are all prehensile, 

 with long, curved dactyli. The 

 basis of the last four pairs is produced in a low carina. 



LIVONECA OVALIS (Say). 



Cymothoa oralis SAY, Jour. Acad. Nat. Sci. Phila., I, 1818, p. 394. 



Cymothoa triloba DE KAY, Nat. Hist. New York, Pt. 1, 1843, p. 46, pi. x, fig. 40. 



(?) Cymothoa olivacea DE KAY, Nat. Hist. New York, Pt. 1, 1843, p. 47, pi. x, figs. 

 41-41a. 



Livoneca ovalis WHITE, Cat. Crust. Brit. Mus., 1847, p. 109. HARGER, with VER- 

 RILL, Eeport U. S. Commissioner of Fish and Fisheries, Pt. 1, 1873, p. 572 

 (278), pi. vi, fig. 29. HARGER, Proc. U. S. Nat. Mus., II, 1879, p. 162; 

 Report U. S. Commissioner of Fish and Fisheries, Pt. 6, 1880, pp. 395-396, 

 pi. xi, fig. 67. RICHARDSON, American Naturalist, XXXIV, 1900, p. 222; 

 Proc. U. S. Nat. Mus., XXIII, 1901, p. 531. 



Localities. New Haven, Connecticut; Thimble Islands; Long Island 

 Sound; Woods Hole, Massachusetts; Vineyard Sound; New York; 

 Patapsco River; Bonday's Wharf, Patapsco, Baltimore City, Mary- 

 land; Charleston, South Carolina; Pensacola, Florida; St. Marys River, 

 Florida; Mobile, Alabama; Biloxi, Mississippi; Sandy Hook Bay, New 

 Jersey; Hunger's wharf, Virginia; Chesapeake Bay; South Florida; 

 Long Island; Great South Bay, Long Island; Tolchester, Maryland. 



Parasite of the blue-fish Pomatomus saltatrix (from gills); Lagodon 

 rhomboides (under gill cover); saw-fish Pristis semisagittatus; scup 

 Stenotomus chrysops (on gills); Trachurops crumenophtJiahnus (from 

 gill); trout Cynoscion regalis f (on gills); sun fish (on gills); Micropogon 

 undulatus. 



