Parasitic Copepoda of Fish. 15 



these being directed backwards, outwards, and upwards, 

 encircling the egg-sacs. 



Head. — Anterior antennas small, three-jointed, last joint 

 terminating in a few small hairs. Posterior antennae placed 

 outside the latter, thick, chitinous, the end being bifid, having 

 an outer blunt branch bearing small tubercles and an inner 

 articulate branch terminating in minute setge. Mandibles 

 small. Maxillary palp foliaceous, four-lobed. First pair of 

 maxillipeds strong, with a powerful, curved, slightly cheliform 

 terminal claw ; they are placed close beliind the rostrum. 



Male. — About 1 centim. long. Cephalothorax large, 

 distinct from the body, which is indistinctly divided into five 

 segments, bearing posteriorly two short, pointed, two-jointed 

 processes. Anterior portion of the ceplialothorax carrying 

 the mouth-organs. Anterior antennaj three-jointed, with very 

 fine setffi at the end of the last joint. Posterior antennae 

 much thicker, articulate, terminating in a short obtuse joint, 

 with a second branch bearing a small dentate claw. Maxillaj 

 bifid at the end, the branches being long and pointed : palp 

 very small. Both pairs of luaxillipeds large and cheliform. 

 According to the present classification this species should be 

 placed with the Anchorellce, for in the female the second 

 maxillipeds are short, also being united together in their 

 whole length ; but the peculiar Brachiella form of the male 

 causes it to be placed in this genus. 



Ancliorella paradoxa, van Beneden. (PI. V. fig. 2.) 



Found in the gills of Scomber scomherj but rare. The 

 species is, however, very characteristic, and the male is distinc- 

 tive, but has not yet been described by any author. 



Male. — Body globular ; cephalothorax produced ; anterior 

 antennas slender, three-jointed ; posterior antennse stouter, 

 bifid at the end, the outer branch being twice the length of 

 the inner, which is flattened. Maxillge slender, long, bifid at 

 the extremity. First maxillipeds very large, the basal joint 

 being oval, strongly muscular, and terminating in a strong 

 hook. Second maxillipeds long, narrow, stilt-like, with the 

 end slightly enlarged, where is seen a minute hook. 



Anchorella quadrata, sp. n. (PI. IV. fig. 5.) 

 A few specimens were obtained of this species from a 

 dragonet, CalUonymus lyra^ attached to the gill-rakers. The 

 cephalothorax is much longer than the genital segment, which 

 is almost quadrilateral. The egg-sacs are small and broad, 

 oval in shape; between the two is seen the abdomen, which 



