of the Fishery Board for Scotiand. 459 
The second maxillipeds resemble the same organs in Stenhelia hispida, 
G. S. Brady (fig. 21). 
The first pair of thoracic feet are moderately stout, the inuer branches 
are about one and a half times the length of the outer branches, first 
joint is equal to the entire length of the second and third, while the 
second is equal to about two-thirds the length of the end joint ; the joints 
of the outer branches are sub-equal (fig. 22). 
The remaining three pairs of feet do not differ very materially from 
the same appendages of Stenhelia ima, except that they are scarcely so 
elongated (fig. 23). 
The fifth pair is foliaceous, but comparatively short ; the secondary 
joints do not extend much beyond the produced inner portion of the basal 
joints, which in outline is broadly triangular, and furnished with three 
setee of unequal length on the bluntly rounded apex, while two dagger- 
like spines spring from the inner margins ; the secondary joints are also 
somewhat triangular, but they are rather narrower than the produced 
inner portion of the basal joints ; the apex of the secondary joints, which 
is somewhat truncate, bears three small sete, and three small hairs 
spring from the outer margin (fig. 24). 
Caudal furca slender, and about as long as the last abdominal segment 
fig. 25), 
“ae species occurred very sparingly in some washings of 
dredged material from Station III., Firth of Forth (to the east of Inch- 
keith), collected on June 7th, 1901. No males were observed. 
Remarks.—This species resembles Stenhelia hirsuta, I. C. Thompson, in 
some respects, and especially in the structure of the antennules, and in 
the length of the caudal furca; but in that species the inner branches of 
the first pair of thoracic feet are long and slender, much more so than the 
present form. The two species differ also in the form of the fifth pair. 
And though the structure of the antennules of Stenhelia confusa bears a 
certain resemblance to those of Stenhelia harsuia, it differs very distinctly 
in this as well as in some other poepeots from almost every other species 
of the genus. 
Ametra tenuicornis, T. Scott (sp. n.). Pl, _XXxIv, figs. 1-9, 
Description of the Female.—Length ‘67 mm. (about =4 of an inch). 
Body moderately slender and sub-cylindrical ; rostrum small (fig. 1). 
Antennules slender and elongated, exceeding in length the cephalo- 
thoracic segment, and composed of eight joints ; the first and second joints 
are sub-equal ; the third and fourth are also sub-equal, but smaller than 
the preceding joints (fig. 2). The approximate proportional lengths of 
the various joints are shown by the formula. All the joints with the 
exception of the first one are sparingly setiferous. 
Evaportional lonsthsiof the joints, , 24 °° 25. 18). A5 . 10.99. G29 
Number of the joints, - - - - - Be 2 ce ae Ae oo te Garin aatenG 
The antenuze are very slender, and the secondary branches are small 
and two-jointed, the end joint being the smallest (fig. 3). 
The mandibles are of moderate size, narrow-cylindrical, and obliquely 
truncate at the apex, which is armed with a few minute spinules; the 
basal portion of the mandible-palp is small but slightly dilated, and 
carries two branches ; the marginal branch is small and one jointed and 
furnished with a few. sete ; the end joint is long and very slender, and 
is minutely serrated at the extremity (fig. 4). 
The second maxillipeds (posterior foot-jaws) are ee stout and 
armed with strong terminal claws (fig. 5). | | 
