4 EEV. T. E. E. STEBBI^'G ON THE 



first joint and the hind margin of the third joint in the fourth perceopods, also to the 

 inner surface on the lower part of the second pleou-segment, and to the rami of the 

 third uropods. 



There have been at various times assigned to this genus twelve named species, one 

 unnamed species, and one named variety. Four of the species have their proper 

 places in other genera. Urothoe rostratus, Dana, 1852, from the Sooloo Sea, was 

 transferred by Boeck in 1876 to Phoxus (now Phoxocephalus) ; and whether it belongs 

 to that genus or not, it is certainly excluded by the maxillipeds from Urothoe. Tn 1874 

 Professor S. I. Smith recorded " Urothoe, species," as " apparently belonging to this 

 genus," from Vineyard Sound, N.E. America. This, however, proves to be a species of 

 the genus Harpinia, Boeck. Urothoe pinguis, Haswell, 1880, from Bondi, New South 

 Wales, also approaches the genus Harpinia, but is clearly removed from Urothoe by 

 the upper antennae, the maxillipeds, the gnathopods, and some other details. Urothoe 

 lachneessa, Stebbing, 1888, from Kerguelen, should be transferred to a new genus 

 Urothoides, on account of the character of the fourth and fifth peraeopods and the third 

 uropods, as well as the absence of the plumose setse, which are so conspicuous in 

 the European species of Urothoe. 



The type species, Urothoe irrostratus, Dana, 1852, had scarcely been published, when 

 another species of the same genus appeared under the name Egidia pulchella, Costa, 

 1853, from the Bay of Naples. The fuller description of this species was given in 

 1857, and in 1872 Boeck pointed out that Egidia was a synonym of Urothoe. In the 

 generic description Costa says that the lower antennae have the first joint unarmed, 

 doubtless meaning that there is no gland-cone ; but this is a mistake, as the gland-cone, 

 though inconspicuous, is present. It is clear both from the generic and specific 

 characters that Costa confused some of the limbs, overlooking one of the first two pairs 

 of perseopods altogether, and regarding the third pair as the second. In describing 

 the third perseopods he also evidently overlooked the second joint, so that, although 

 he gives a recognizable description and figure of the last four joints of the limb, he 

 supposes the last of the four, the finger, to be entirely wanting. It is clear from the 

 account of the lower antennae that Urothoe pulchella was described from a male 

 specimen. The eyes are stated to be large, rounded-triangular, nearly meeting on the 

 back. The colour of the living animal was, according to Costa, pale green {verdiccio 

 pallido). The prevailing colour in the genus is light bufl", sometimes mottled with 

 pink or rose-colour. Rose-coloured specimens procured from Naples by Dr. Norman 

 must probably be assigned to Urothoe elegans, Bate. Other specimens from the same 

 locality, not so coloured, agree well with Costa's species, though not having the hand 

 of the second gnathopods produced into a tooth confronting the finger. This tooth 

 may have been described and figured by Costa under a misapprehension owing to his 

 having only had an oblique view of the little convex palm. 



