482 On the 'Myrioiioda of Dominica. 



Legs almost smootlij each segment furnished beneath with 

 a single seta; distal segment in male bearing pad beneath. 



J • Right and left portions of the copulatory apparatus 

 united in front by a triangular plate, concave from side to 

 side, two of the sides of which are slightly sinuous and con- 

 verge below to a bifid point ; the third and superior side is 

 strongly concave; each cf the upper angles of the plate is 

 produced into a process which, at first slender, runs upwards 

 and curls round the side of the anterior huniiia, immediately 

 dilates into a second triangular piece, which, abruptly nar- 

 rowing behind, skirts the lateral superior margin of the ante- 

 rior lamina and is continued inwards along that of the poste- 

 rior lamina. Anterior aspect of anterior lamina narrower 

 above, projecting for about a quarter of its length below the 

 triangular plate ; produced into two small blunt processes, 

 one inner, the other outer, between which tlie inl'erlor margin 

 slopes obliquely upwards and outwards. Outer margin of 

 front aspect of plate nearly straight and rounded ; lateral 

 aspect of plate somewhat heart-shaped, with the apex directed 

 downwards ; behind it meets the posterior lamina in a nearly- 

 vertical and straight suture. Posterior lamina irregidarly 

 oblong, about twice as high as it is wide ; about the middle 

 of the inner margin is a conspicuous notch, from which is 

 continued inwards a deep groove, which quickly dilates into 

 a wide depression occupying the greater part of the lower 

 half of the lamina. 



Attached on each side by a muscle to the upper part of the 

 prolongation of the triangular plate is a slender rod, which, 

 thicker in front and slightly curved, runs directly backwards 

 to be articulated with the proximal end of the internal pro- 

 trusible portion of the apparatus for which the anterior and 

 posterior lamina described above constitute a sheath. 



This internal protrusible portion consisting of two seg- 

 ments, the proximal of which is short and about one third tiie 

 length of the distal segment ; distal segment curved from 

 above downwards, more or less wrinkled at the sides, partially 

 hollowed behind, wider above and bluntly pointed at its distal 

 extremity. From the middle of its posterior margin there 

 arises a downwardly directed, compressed, and somewhat 

 oblong tooth ; from the lower surface of the base of this tooth 

 spring two small slender processes, one inner, the other outer, 

 the former being sliarp, needle-like, and almost straight, the 

 latter sharp and twisted upon itself. From the posterior sur- 

 face of the distal extremity of this segment arises a somewhat 

 membranous piece, which bifurcates and runs up towards the 

 above-mentioned oblong tooth. 



