Thomson. — On Parasitic Copepoda. 373 



short, very thick and fleshy, and only imperfectly 2-lobed. 

 Abdomen very small and completely hidden by the posterior 

 lobes of the body. Oviferous tubes rather stout, about twice 

 as long as the body. 



Length of body, 5mm. ; breadth, 3mm.; length of oviferous 

 tubes, 9mm. 



Hah. Found on the gills and abdominal wall of the red 

 cod — Lotclla bacchus — appai'ently not uncommon. 



Fam. LERN.EOPODIDiE. 



Genus Lernaeopoda, Kroyer. 



Head short and thick, not very distinctly separated from 

 the rest of the body. Thorax not showing any distinct seg- 

 mentation ; genital segment narrow, sac-like. Antennae of 

 first pair small, springing within the hook-like second pair. 

 Mouth produ.ced into a short but prominent proboscis, on each 

 side of which the free palps of the maxillae are seen. Foot- 

 jaws of first pair in form of hooked claws. Those of second 

 pair produced under the head in the form of two long arms, 

 Avhich are joined at the extremity into a disc, by means of 

 which the animal anchors itself firmly in the tissues of the 

 host on which it lives. Legs quite \vanting. Oviferous sacs 

 nearly or quite straight. 



1. LerncBopoda mustcli, n. sp. Plate XXYIIL, figs. 9 and 

 9a. 



Head rather small, about one-fourth as long as the body, 

 ovoid in form, considerably longer than broad, and somewhat 

 arched forward. The succeeding segments of the thorax form 

 a very short and indistinct neck, below wdiich is the large, sac- 

 like, elongated, and smooth genital segment. The arms are 

 rather stout at the base, but taper towards their extremity, 

 which ends in a very small attachment-disc ; they are con- 

 siderably longer than the genital segment, and protrude from 

 below the front of the head, so as to make a very acute angle 

 with the rest of the body. Mouth-organs very indistinctly 

 made out. External ovaries rather stout, as long as or longei- 

 than the genital segment. Abdominal lobes short, about one- 

 sixth of the length of the segment preceding them. 



Total length of the body alone, 5nnn. ; with the oviferous 

 tubes, 9nmi. 



Hah. A single specimen taken from the cloaca of the 

 smooth-hound — Mantelus antarcticus. (Otago Museum.) 



Genus Brachiella, Cuvier. 



This genus is distinguished from the preceding (and the 

 whole group to wliich it belongs) in having the cephalo- 



