324 DR THOMAS SCOTT ON THE 



in Cydopina littoralis, G. S. Brady. The fifth pair in the female has the end joint 

 elongated and narrow ; it is about three times longer than broad, and its armature 

 comprises four setae, three terminal and one near the middle of the outer margin 

 (fig. 12). 



As stated above, these Scotia specimens agree fairly well with GIESBRECHT' s descrip- 

 tion and figures of his Cydopina belgicee, and are therefore ascribed to that species. 



Genus Euryte, Philippi, 1843. 

 Euryte similis, new species. (PL I. figs. 14-22.) 



Description of the Female. The female of this species somewhat resembles that of 

 Euryte robusta, Giesbrecht, in its size and general appearance (fig. 14). 



The antennules are tolerably stout, and composed of twenty-one joints ; the first 

 joint is robust and about twice the length of the second, while the second is about one 

 and a half times as long as the third ; the next six joints are very short, and the others, 

 though somewhat longer than those immediately preceding, are also tolerably short and 

 are all more or less of similar size, except the end joint, which is rather longer than the 

 penultimate one (fig. 15). The posterior antennae closely resemble those of Euryte 

 robusta, Giesbrecht. 



Both pairs of maxillipeds, which are moderately stout, also resemble those of the 

 species mentioned. The first pair have the basal joint furnished near the distal end 

 with a spine which is gibbous at the base and with a furcated process ; the end joints, 

 which terminate abruptly, bear several tolerably stout, elongated, and slightly curved 

 apical spines (fig. 17). The second maxillipeds are four-jointed ; the third joint is short, 

 but the others are of moderate length ; the last one is narrow, and armed with two apical 

 claws of unequal length (fig. 18). 



The first four pairs of swimming feet are nearly all similar to those of Euryte 

 robusta ; both branches are moderately stout and three-jointed, and the inner is rather 

 longer than the outer branch ; in all the four pairs, the end joint of the inner branch is 

 provided with dagger-shaped spines, but with no setse ; in the first, third, and fourth 

 pairs, the number of spines on the end joint of the inner branch is seven, while the end 

 joint of the second pair bears only five, arranged as shown in the drawings. In the fourth 

 pair, the end joint of the outer branch is armed with nine dagger-shaped spines, three 

 on both the inner and outer margins and three at the apex ; the end joint of the outer 

 branch in the third pair is also similarly armed (figs. 19-21). 



The fifth pair are similar to those of Euryte longicauda, Philippi (fig. 21). The 

 third and fifth segments of the abdomen are nearly of equal length and rather longer 

 than the fourth segment ; furcal segments about one and a half times the length of the 

 last abdominal segment (fig. 22). 



Remarks. Euryte longicauda, Philippi, has been recorded from the Mediterranean, 

 the Black Sea, and the coasts of France, Britain, Norway, and East Greenland. It has 



(ROY. soc. EDIN. TRANS., VOL. SLVIII., 570.) 



