282 REPORT OF NEW JERSEY STATE MUSEUM. 



Ceratothoa impressa (Say). 

 Plate 83. 



Cymothoa impressa Say, Jouni. Acad. Nat. Sci. Phila., I, 1818, p. 397. Cape 



May, Netv Jersey. 



De Kay, N. Y. Fauna., Crust., VI, 1844, p. 48 (on Say). 



Ceratothoa impressa H. Richardson, Bull. U. S. Nat. Mus., No. 54, 1905, 



p. 234, figs. 236-240. Lat. 42° N. to Rio Janeirio, Brazil. 

 Ceratothoa linearis Dana, U. S. Expl. Exped. Crust., XVI, 1853, p. 752, PI. 50, 



figs. la-id. Gulf Streavi. 

 Stebbing, Hist. Recent Crust. (Intern. Sci. Series LXXIV), 1893, p. 



354 (reference). 

 H. Richardson, Amer. Nat., XXXIV, 1900, p. 221. Cape Cod to North 



Carolina region. 

 H. Richardson, Proc. U. S. Nat. Mus., XXIII, 1901, p. 529. Cape 



May, New Jersey. N. Lat. 42°-2i° W. Long. 40°-5o°. Gulf Stream 



everywhere. 



Description.- — Body elongate, little over three times longer 

 than broad. Head little broader than long, not deeply set in 

 thorax, with front emarginate on each side of broad elongate 

 median process, apex of which obtusely pointed. Antennas fit in 

 these excavations. Front lateral angles of head acutely pointed. 

 Eyes small, about twice as broad as long, somewhat obliquely 

 placed at sides of head, and also about half way between front 

 lateral and hind lateral angles. First antenniE formed of seven 

 seg'ments, and basal segments in each antennae adjacent on 

 ventral side. First antennae reach just below eyes. Second an- 

 tenUcC formed of eleven segments, last three very minute. Seg- 

 ments of both pairs of antennre greatly expanded and flattened. 

 Second antennae reach to hind edge of head. Maxillipeds with 

 palp of two segments. Mandil>ular palp very large, conspicuous, 

 formed of three segments. Second or hind maxillae very large, 

 conspicuous, bilobed at tip, and both lobes with small hooks. 

 First four thoracic segments large, about equal in length, fifth 

 segment half as long as any four preceding segments, and sixth 

 and seventh segments very short in median dorsal line and each 

 about one-half length of fifth. First thoracic segment with front 

 lateral expansion produced in carinated process produced out- 

 ward and forward, and ends acutelv little anterior to front lateral 



