572 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



The abdomen is composed of six segments, the first five short and 

 about equal in length ; the sixth equal in length to the other five, trun- 

 cate in front and rounded behind. The spines beneath the abdomen, or 

 "abdominal epimera," are acute, the second a little more slender than the 

 first, and extending not quite to the posterior angle of the fourth ab- 

 dominal segment. The internal plate of the caudal stylets is oval and 

 obliquely truncate, shorter than the external, which is narrow, ovate, 

 acute behind, extending about half its length beyond the tip of the ab- 

 domen and longer than the preceding segment of the stylet. Claws of 

 the anterior feet strongly hooked, those of the posterior feet feebly so. 



Color, in alcohol, brown, with two narrow dorsal bands of lighter 

 color. 



Length, 15 mik ; breadth, 7 mm . 



This species is allied to N. bivittata, but differs from that species as 

 figured by Milne Edwards, (Atlas du Regne animal de Cuvier, Crust., 

 Plate 66, fig. 5,) in the shortness of three posterior epimera, the 

 regularly rounded terminal segment of the abdomen, and the shape of 

 the caudal stylets. 



A single specimen was obtained on the dorsal fin of Ceratacanthus an- 

 rantiacas. 



Conilera concharum Harger. (p. 459.) 



JEga concharum Stinipson, Marine Invert. Grand Manan, p. 42,.1853. 

 Vineyard Sound ; Charleston, South Carolina. 



Livoneca ovalis Harger. Plate YI, fig. 29. (p. 457.) 

 Cymothoa ovalis Say loc. cit. ; p. 394, 1818. 



•These animals are usually distorted, and not, as represented in the 

 figure, symmetrical on the two sides. 



The specimen figured was taken from a blue-fish near the gill. 



Anthura brunnea Harger, sp. nov. (p. 426.) 



Nearly uniform in size throughout, but slightly narrower anteriorly. 

 Antennulse and antennae nearly equal in length, scarcely longer than the 

 head. Front projecting between and each side of the bases of the anten- 

 nulse into prominent angles. Eyes small and situated in the sides of the 

 lateral prominences. Thoracic segments smooth and shining above ; the 

 third with a slight semicircular depression on the middle of the anterior 

 margin. This depression is still more strongly marked on the three fol- 

 lowing segments. First segment slightly longer and narrower than the 

 others 5 second to fifth about equal; sixth and seventh considerably 

 shorter; the seventh about three-fourths the length of the sixth; all 

 the segments carinated below. Dorsal surface of the basal portion of 

 the abdomen similar to the posterior segmeut of the thorax, showing 

 no indication of segments. Terminal portion flat, smooth, and narrowly 

 ovate at tip. Appendages of the penultimate segment lamelliform, 

 similar in form to the terminal plate but not quite equaling it. First 

 pair of feet short and thickened. All the feet slightly hairy. 



