of the Fishery Board for Scotland. 245 



(fig. 26). In the fourth pair the inner branches are two-jointed, and not 

 much more than half the length of the outer branches ; a moderately long 

 plumose seta springs from the inner margin of the first joint, and three 

 similar setae from the inner margin of the second joint; the inner branches 

 are also provided with two small apical spines (fig. 27). 



Remarks. — It is probable that the species described above may be new 

 to science, as it does not agree very satisfactorily with any described species 

 known to me; but in the meantime I prefer to place it under the Botryllo- 

 philus ruber of Hesse, with which it agrees in some of its more characteristic 

 features. 



Harpacticid^:. 



Longipedia minor, T. and A. Scott. 



Specimens of this Copepod were obtained in a gathering collected at 

 72 fathoms in the Sound of Mull, on March 31st, 1900. There can be 

 no reasonable doubt as to there being two distinct forms of Longipedia, 

 a larger {L. coronata, Claus), and a smaller (L. minor, T. and A. Scott), 

 for ova-bearing females of both are occasionally obtained. Whether the 

 smaller form should be regarded as a species or a variety is- a question 

 that is comparatively unimportant; the two terms are in not a few instances 

 convertible, as their use depends to a large extent merely on one's opinion 

 as to the value that should be placed on certain observed differences either 

 in structural details or otherwise. 



Canuella perplexa, T. and A. Scott. 



This fine species was obtained in tow-net gatherings collected In Dornoch 

 Firth, near Muckle Ferry, on May 19th, 1900. This is a new station 

 for Canuella perplexa. 



Eucanuella, T t Scott (gen. nov.). 



Eucanuella is, in some respects, not unlike Longipedia, Claus, but is 

 somewhat intermediate in structure between that genus and Canuella. 

 Eucanuella differs from both of the genera named in the structure of 

 the antennae, of the maxillae and of the second maxillipedes, and to some 

 extent in that of the first thoracic feet ; it agrees with Canuella in the 

 structure of the second, third, and fourth pairs of feet, and to some extent 

 in that of the first pair, but differs in that of the fifth pair ; it agrees 

 with Longipedia in the structure of the third, fourth, and fifth pairs of 

 thoracic feet, and to some extent in that of the first pair, but differs in 

 that of the second pair. As there is but the one species of Eucanuella, a 

 detailed description of the various points referred to will be found in the 

 specific definition. 



Eucanuella spinifera, T. Scott (sp. n.). (PL XVIIL, figs. 1-10.) 



Description of the female. — Body elongated, moderately stout, gradually 

 tapering towards the extremity of the abdomen; length, 1*33 mm. (about 

 -^q of an inch). The forehead terminates in a broadly conical rostrum, 

 the apex of which is rounded. The first cephalothoracic segment is about 

 as long as broad, and equal to fully the entire length of the remaining 

 segments of the thorax, which are all moderately short. The posterio- 

 lateral angles of the fourth joint of the thorax and the first joint of the 



