664 ON CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOUTH SEAS. 



COPEPODA. 



copepoda semipaeasitica. 



Fam. Lichomolgidae. 



1877. Lichomolgidae, Kossmann, Zool. Ergebn. einer Reise...Rothen Meeres, Erste 

 Halfte, Entomostraca, pt. 1. 



1880. Sapphirinidae, Brady, British Copepoda, Roy. Soc, vol. 3, p. 89. 



1883. Co7-ycaeidae (part), Brady, Challenger Reports, vol. 8, Copepoda, p. 109. 



1885. Sapphirinidae (Section h, Lichoviolgina), Carus, Prodr. Fauna Mediterrannae, 

 vol. 1, p. 3.50. 



1889. Lichomolgiden, Claus, Arbeiten Zool. lust. Wien, vol. 8, pt. 3, pp. 1, 19. 



1891. Lichomolgidae, Canu, Bull. Sci. France-Belgique, vol. 23, p. 477. 



Concerning genera belonging or closely allied to this family there is frequent 

 mention or discussion in the writings of Thorell, Professor Delia Valle, Mr Thomas 

 Scott, F.L.S., Dr Giesbrecht, and others. Canu {loc. cit. p. 482) observes that the 

 members of it are doubtless near relatives of the Sapphirinidae on one side, and of 

 the Ergasilidae on the other. The most precise definition of it at present available 

 appears to be that given by Claus in 1889, and with that the new genus here assigned 

 to the family in many respects agrees, but whereas Claus states that the first antennae 

 are generally seven-jointed, they are here eight-jointed, and while he describes the 

 maxillipeds as three-jointed, provided in the male with powerful grappling hooks, these 

 parts in the new genus would rather appear to be one-jointed in the female, and to 

 have vanished from the male. 



LiNCKIOMOLGUS, n. g. 



Body pirifonn, of ten segments ; the shield, composed of head and first thoracic 

 segment, long and broad, the next two segments broad but short, the two following 

 abruptly narrower; the genital segment rather broader than long in female, but not 

 in male ; the four following segments very small and the caudal appendages not longer 

 than broad, one of their apical setae very long, especially in the female ; eyes not 

 perceived; first antennae eight-jointed, without ' aesthetask,' setose; second antennae 

 four-jointed, apically uncinate ; first four pairs of feet biramous, all the rami triarticulate, 

 except inner one of fourth pair, which is slender, biarticulate ; fifth feet slight, one- 

 jointed. Female much larger than the male, with two large egg-sacs, containing 

 numerous eggs. 



Generic name compounded of- Linckia, name of the host, and f^oX.y6<;, skin, the 

 I'orm of the name being intended to link this genus with Lichomolgus historically, 

 even if the changes and chances of classification should sever it from the Lichomolgidae. 



LiNCKIOMOLGUS CAERULEUS, n. sp., Plate LXXIVb. 



Female. The shield is moderately convex, as long as the rest of the body minus 

 the short caudal appendages, and is considerably broader than long, with front and 

 sides smoothly rounded, postero-lateral angles a little produced, acute, as also are those 

 of the two following segments, which successively diminish in breadth, the second of 



