BUPHAUSIACEA AND MYSIDACEA—TATTERSALL. 
11 
of the exopod is freely acuminate at the outer distal corner, and the flagellum-like 
portion is composed of nine joints. The endopods of the remaining thoracic limbs 
(fig. 5) are long and slender, increasing in length from the third to the seventh limbs, 
the endopod of the eight limb being much shorter than that of the seventh. The sixth 
joint is divided into nine subjoints in the third limb, the number increasing to fourteen 
in the seventh limb, the eighth limb having only ten. The dactylus is feebly developed 
and not claw-like. The basal joint of the endopods of the third to the eighth pair of 
thoracic limbs bears a well-developed epipodial process. 
Abdomen.- -With the sixth segment twice as long as the fifth; first pair of pleopods 
of the male with the endopod short and unjointecl, and having the usual lateral lamella, 
exopod well developed and multiarticulate; second, third, and fifth pair of pleopods 
in the male, well developed, biramous, the rami approximately equal and not having 
any modified armature; fourth pair of pleopods in the male (fig. 6) well developed, 
biramous, the outer ramus nearly twice longer than the inner, and having on the outer 
distal corner of the antepenultimate and penultimate joints, a long strong spiniform 
seta barbed on the distal half of their margins; the basal joint of the exopod bears a 
short blunt process on its lower and inner surface. 
Telson (fig. 7) longer than the sixth abdominal segment, dorsally channelled, 
and therefore ventrally keeled, two and a half times as long as broad at its base, margins 
armed throughout their entire length by about thirty-six spines, the terminal spine of 
each margin rather stronger than the other spines; apex cleft, the cleft equal to about 
one-fifth of the total length of the telson and armed with closely set pectinations as 
well as with two plumose setae at the centre, the setae slightly longer than the cleft. 
TJropods long and slender; inner plate one quarter longer than the telson, its 
inner margin armed with spines extending from the statocyst to the apex, the spines 
being closely set for the greater part of the margin but becoming more distantly placed 
and longer towards the apex, arranged more or less in series, sometimes as many as 
four in a series, but the serial arrangement is not regular nor obvious; the outer margin 
of the inner uropods bears in addition to the usual setae a few scattered “ kegelfdrmige ” 
bristles; outer uropods one and a half times as long as the inner, rather slender and 
narrow in form. 
Length of the type and only specimen, an adult male, 21 mm. The type has 
been deposited in the British Museum. 
T. tenuipes is easily distinguished from the type and only other described species 
of the genus by the extreme length and tenuity of the thoracic limbs, and especially 
by the larger number of subjoints in the sixth joint of the endopods, by the longer and 
narrower antennal scale, by the longer telson and the larger number of spines arming 
its margins, and by the armature of the inner margin of the inner uropods. I have 
four undescribed species of the genus taken in New Zealand waters on the last expedition 
of the “ Discovery.” They will be described in the Reports on that Expedition, but 
