206 Bulletin, Vmiderhilt Marine Museum, Vol. Ill 



The first antennae reach almost to the posterior margin of the head 

 and consist of eight articles. The basal articles of the two first 

 antennae are well separated. 



The second antennae consist of nine articles, the distal three of 

 which extend beyond the first antennae. 



The palp of the maxilliped has two articles ; that of the mandibles 

 has three articles. 



The first thoracic segment is about one and one-half times as long 

 as the second. The second, third and fourth segments are subequal; 

 the fifth segment is about half as long as the fourth segment ; the sixth 

 segment is subequal to the fifth; the seventh segment is about half 

 as long as the sixth. The epimeral plates are sharply defined on all 

 except the first segments. They are narrowed, elongate plates, those 

 of the second to fourth segments, inclusive, each about two-thirds to 

 three-fourths as long as the related segment, the fifth epimera reach- 

 ing almost to the postlateral angle of the segment; the sixth and 

 seventh epimera extending quite to the extremity of the postlateral 

 angles. 



The abdomen is deeply set in the thorax, the first segment being 

 very narrow, the remaining segments gradually increasing in length ; 

 the telson is about twice as wide as long, broadly rounded on the post- 

 lateral margin and slightly excavate in the median posterior margin. 

 The uropoda are short, both blades narrow, rounded distally, the inner 

 branch the shorter. 



All seven pairs of legs are strongly prehensile, with curved, hook- 

 like dactyli, each of which has a high carina on the basis of the last 

 four pairs of legs ; the carina increasing in height from the fourth to 

 seventh legs respectively. 



Synonymy : — Cymothoa excisa Perty, Del. Anim., p. 31, 1830-34. 

 Cymothoa parasitica de Saussuee, Kevue Mag. Zool. (2), IX, p. 306, 

 1857 ; Mem. Soc. Phys. Geneve, XIV, pt. 2, p. 485, pi. 5, fig. 44, 

 1858. 

 Cymothoa excisa Schiodte and Meinert, Naturhistorisk Tidsskrift 



(3), XIV, 1883-84, p. 238-244, pi. VI, figs. 11-16 (responsible for 

 above synonymy). 

 Richardson, Amer. Nat., vol. 34, 1900, p. 221 ; Proc. U. S. Nat. Mus., 

 vol. XXIII, p. 530, 1901 ; Bull. 54, U. S. Nat. Mus., p. 248, text 

 figs. 259-260, 1905. 



