THE GENUS LEBERTIA. 491 



pair, and have only from one-third to one-half the nnmher of 

 hairs and spines present in the adult. Only one or two swimming- 

 hairs are to be seen. The provisional genital area has no vulva, 

 but two pairs of stipitate acetabula, surrounded by two semi- 

 circular chitinous structures, which almost meet together to form 

 a circle. 



Lebertia Soari Sig Thor. 



1905. Sig Thor, Zool. Anz., xxix. 55. 



This species must be rejected, as it is founded on a diagram- 

 matic representation of what was at the time considered to be 

 the only species of the genus (vide Science Gossip, vi. 45, and 

 relative figures). 



Lebertia fimbriata Si^ Thor. 

 (Sub-gen. Lebertia.) 



1839. Lebertia Jimbriata Sig Thor En ny hydrachnide-slegt og 

 andre nye Arter 0. iVorli, Kristiania, p. 5. PI. xviii. fig. 

 172-175. 



1905. Sig Thor, Zool. Anz., xxix. 41-52, figs. 5-17. 



This hydracarid is of a dirty yellow colour, which is somewhat 

 masked by the large brown patches and the broad pale-yellow 

 strip on the back. It appears that the colour is apt to vary a 

 little. The legs are more transparent and of a paler colour than 

 the body. The epimera are about the same colour as the body, 

 but more iridescent. The body is soft skinned, without any 

 ridges or papillae, and has scattered over it many fine pores which 

 are covered externally by a fine membrane. The gland pores, 

 each accompanied by its fine guard hair, lie in four longitudinal 

 rows and are conspicuous by reason of the strong ring which sur- 

 rounds each of them. The length of the imago varies from abou 

 0*7 mm. to 0'9 mm., and if the anterior tips of the epimera are 

 included may even reach 1 mm. Viewed dorso-ventrally the 

 outline is a rather elongate ellipse, which is indented anteriorly 

 between the antenniform bristles. The dorsal surface is arched 

 very much more than the ventral. The tips of the first two pairs 

 of epimera, each with a long, fine, weakly pectinate hair, are very 

 noticeable beyond the anterior end of the body. 



