714 Brady and Norman — Monograph of the Marine and Freshoater Ostracoda 



behind, and obtusely pointed in front. Length of male, 1-05 mm. ; of the 

 female, 1'08 mm. 



Antennules (PI. lxvi., fig. 10) seven- jointed, first two joints stout, and about 

 equal in length, first joint bearing on its inner margin a single short spine-like 

 seta, and four very slender, long setse, towards the outer margin is attached an 

 extremely long seta which reaches as far as the apex of the fifth joint ; second joint 

 having three very stout plumose set8e near the distal end of the inner margin, and 

 a very small seta on the outer margin ; third joint almost triangular, the inner 

 margin being extremely short, a single long seta at the outer apex ; the remaining 

 joints are all furnished with non-plumose setfe on their inner edges, the fourth, fifth, 

 and seventh joints have three, the sixth only two ; the fourth and sixth joints 

 bear also slender setse on their outer margins. All the stronger setse of this limb 

 are contracted at the base (fig. 10 a) so as to move, apparently, as on a hinge at 

 the point of insertion. 



Basal portion of tlie antennae (PI. Lxvr., fig. 11) very massive, first joint much 

 longer than the second, quadrate, and having two rather long, simple setse on its 

 outer margin ; second joint subtri angular, dilated distally so as to form a lobe at 

 the inner side, to which are attached three long setse ; to the outer margin are 

 attached four or five small spinules ; first joint of the outer branch of the antennae 

 with four large setse on the inner half of the distal extremity, from the outer half of 

 which springs the second joint, which is much narrower than the preceding, is 

 truncated at the apex, and bears seven terminal setse, which increase in length 

 progressively from the outer to the inner side ; inner branch with the first joint 

 as broad as long, widened distally, and furnished with about twelve distal setse ; 

 second joint much narrower, rather longer than broad, with one seta on the inner- 

 most side of the distal extremity and two (?) on the outer side ; last joint about 

 equal in length to the preceding, but much narrower, with one seta on the inner 

 margin and two long and ver}^ slender setse at the apex. 



Mandible (PL lxvi., fig. 12) small, obliquely truncated at the extremity, 

 where it is divided into a few very small teeth, palp large, obscurely two-jointed, 

 first joint very long, beset along its entire length with a closely packed series of 

 very long curved setse, and bearing at its distal end a small digitiform process 

 v.^hlch ends in a moderately long, straight seta; second joint about one-fom-th 

 as long as the first, somewhat plough-share shaped, and ending in a long seta; 

 at the base of the limb is a very minute branchial plate with about six setse. 

 Biting portion of the first pair of maxlllse (PI. lxvi., fig. 13) composed of three 

 small setiferous lobes, palp indistinctly triarticulate : the large basal joint of the 

 palp bears a series of long curved setse similar to those of the mandible palp, and 

 is divided into two arcuate marginal lobes, each of which bears four spine-like, 

 but slender, setse ; second joint subquadrate, about half as long as the preceding, 

 and on the inner margin four spine-like setae similar to those of the first joint, 



