Thomson. — On Parasitic Copepoda. 371 



least — several small Cirripedcs and Scrpida. -The bunches of 

 coralline-like appendages at the posterior margin of the genital 

 segment are irregular in form, and equal it in length. The 

 oviferous tubes are thin and nearly straight, or at most only 

 slightly curved, and are about 60mm. long. 



The whole length of the animal (exclusive of the oviferons 

 tubes) is about 70mm. 



Hab. Taken from the abdomen of a ling {Genypterns 

 blacodcs), in the tissues of which the whole soft front part 

 of the body was imbedded. 



Genus Chondracanthus, De la Eoche. 



The males of this genus are very minute, and are found 

 a;ttached under the posterior extremity of the thorax of the 

 females. The body is more or less pyriform in shape, having 

 a very large head and an articulated thorax. They are also 

 provided with verj^ large hooks (posterior antenna?) by which 

 they remain attached to the females. 



Females hoNrng the body of more or less bizarre form, and 

 furnished with tubercles or lobed processes. Head generally 

 indistinctly separated from the thorax and furnished with two 

 pairs of antennae. Of these, the first pair are usually short, 

 and l-(3) -jointed, while the second pair are in the form of 

 hooked claws. The mouth is situated rather far back, and is 

 furnished on each side with a small hooked maxilla. The 

 foot-jaws are small, and end in hooked claws. Two pairs of 

 thoracic feet are developed in the form of bifurcate lobes. The 

 genital segment is usually produced backwards in the form of 

 two lobe-like processes : between these arise the stout o\'i- 

 ferous tubes. Between them projects a minute tubercle, repre- 

 senting the rudimentary thorax. 



1. CJiondracanthus chilomycteri, n. sp. Plate XXVTIL, 

 fig. 5, a^d. 



Body rather stout, nearly three times as long as broad. 

 Head small and not distinctly separated from thorax. Thorax 

 divided into two rather distinct parts, of which the anterior is 

 only half as wide as the posterior : the former is elongated 

 and bears on each side two rouiided protuberances which pro- 

 ject laterally to a small extent : the posterior portion on the 

 other hand is sub-quadrate in form, and bears two rounded 

 protuberances, wliicli project on its ventral face ; the pos- 

 terior extremity on each side is produced backwards to an 

 obtuse lobe. The antenna?, which are broa-dly falcate in form, 

 are rather closely approximated at their base, and do not 

 reach to the margin of the head on each side. The first pair 

 of thoracic legs are very small, and exhibit distinct segmenta- 

 tion ; the second pair are very much larger, a)Kl consist only 



