new Parasitic Copepods on Fish. 13 



above the pectoral. Near the point of insertion there was 

 often an area of extravasated blood from irritation. 



This species resembles most L. encrassicola of Baird, but 

 the sharp cephalic processes are less spreading and the neck 

 is much longer. Male not found. 



Female (Plate VII. fig. 1). — Length of head 2 millira., of 

 neck 4 centim. ; body 15 millim., abdomen 13 millim. 



Head triangular, with blunted end, terminating postei'iorlj 

 on the under surface in three short horns, the lateral being 

 slightly divergent^ all sharply pointed. At the blunted extre- 

 mity in young specimens two pair of antennae are visible, 

 the anterior indistinctly three-jointed, provided with fine hairs 

 at the extremity. Posterior antennoi with two short thick 

 joints, the second bearing a strong thick recurved hook, 

 which opposes a tubercle of the outer side of the same. 

 Mouth-opening circular, near extremity on the underside, 

 border ciliated. There are four pair of limbs placed a short 

 distance posterior to the mouth ; they are very small : the 

 first and second limbs are two-branched, each having two jomts, 

 the last fringed with plumose hairs; the third and fourth limbs 

 single-branched, three-jointed, the last carrying four plumose 

 hairs. Genital segment elongated, flask-shape. Abdomen 

 simple, straight, tapering slightly from the base, extremity 

 blunt. Egg- sacs very long and fine, bright green when 

 alive. 



Genus Peeoderma, Heller. 



Peroderma hranchiaiUy sp. n. (PI. VII. fig. 2.) 



A single example of this species was found on a small fish 

 at Bombay — Goilia Dussumieri — the front two thirds being 

 buried into the flesh above the pectoral fin, the posterior 

 portion and egg-sacs only being visible; the bulbous anterior 

 extremity was directed upwards, inwards, and forwards, the 

 head at right angles above the ribs. This genus is described 

 by Heller with a single species ; it seems to be sufficiently 

 distinct to be retained. (PI. VII. fig. 2.) 



Female, — 9*5 millira. long without the egg-sacs. Body 

 cylindrical, with a slight curve backwards at the posterior 

 extremity. Anterior portion in front of neck rounded, one 

 fourth of total length ; neck narrow, cylindrical, longer than 

 broad, placed at right angles to the body, bearing a thickened 

 lobed head, furnished with a great number of fringed pro- 

 cesses ; these on higher magnification show the terminal 

 branches to have a very regular manner of division, a bifid 



