502 BULLETIN 158, UNITED STATES NATIONAL MUSEUM 



its convex margin. Maxilliped 3-segmented, the distal segment with 

 a slender apical claw and a rounded lobe armed with short spines. 

 Both pairs of legs are cylindrical and biramose, the endopods longer 

 than the exopods, both rami unarmed. Neither ramus is jointed with 

 the basipod and hence these legs correspond well with those of the 

 following species, in which each leg is uniramose and bilobed at 

 the tip. Total length, 7.5-8 mm. Greatest width, 3 mm. Length 

 of ovisacs, 7-9 mm. 



Male. — Body j)yriform; head fused dorsally with the first two 

 metasome segments, but ventrally there is a short median gi'oove 

 between the first and second segments, which does not reach the lat- 

 eral margins. Trunk distinctly 3-segmented, the terminal segment 

 carrying the spermatophore receptacles; caudal rami rather stout, 

 conical, acuminate, and each bent into a sigmoid curve. Antennae 

 similar to those of the female and both pairs distinctly dorsal in 

 their attachment. Mouth parts like those of the female, but rela- 

 tively larger and stouter; each leg a tiny 1-segmented lamina with 

 two small setae. Total length, 0.55-0.65 mm. 



Remarhs. — This new species is evidently quite common upon the 

 tile fish, to judge by the number of specimens obtained. It can be 

 recognized in the female by the length of the posterior processes on 

 the metasome together with the width of the first two free segments, 

 and in the male by the curiously curved caudal rami. 



ACANTHOCHONDRIA FLURAE (Kr0yer) 



Plate 37, f-n 



Chondracanthus fturae Kr0yer, Naturh. Tidsskrift, ser. 3, vol. 2, p. 249, pi. 13, 

 1863.— T. and A. Scoto, The British parasitic Copepoda, p. 171, pis. 47, 53, 

 1913. 



Occurrence. — Taken from the gills of the fluke {Gli/ptocephalus 

 cynoglossus) ^ captured on Georges Bank in 1878, and from the gills 

 of the sand dab {Hippo glossoides platessoides) north of the present 

 area, off Cape Ann. 



Distribution. — Kattegat (Kr0yer) ; Irish Sea, Scottish coast (T. 

 and A. Scott) ; off Middleton Island, Alaska (Wilson). 



Color (preserved material). — Body a uniform brownish yellow. 



Female. — Head transversely elliptical, wider than long; first two 

 thoracic segments well defined, narrower than the head, the second 

 segment wider and longer than the first. Third segment distinctly 

 separated from the fourth and more than twice as wide as the first 

 segment; fused fourth and fifth segment a little longer than the 

 third, its posterior processes short and slightly convergent; urosome 

 2-segmented, not reaching the tips of the posterior processes. First 

 antennae moderately fleshy, 2-segmented, the distal segment small 



