of the Fishery Board for Scotland. 243 
basal joint reaches to about the middle of the secondary one (fig. 10). 
Caudal stylets shorter than the last abdominal segment, and broadly pyri- 
form. ‘The principal tail sete are as long as the abdomen. 
Male.—Anterior antenne ten-jointed. The fourth joint is narrower than 
the one that precedes or follows, and is hinged to the fifth; the sixth, and 
seventh, are very short, and the joints between the eighth and ninth, and 
between the ninth and tenth segments, appear to be hinged so that each 
antenna forms a powerful grasping organ (fig. 3). The inner branches of 
the third pair extend to the end of the second joint of the outer branches, 
and is furnished, in addition to the plumose marginal sete, with a ter- 
minal spine-like appendage (fig. 9). The form of the fifth pair is some- 
what similar to those of the female, but smaller, and without the very 
long seta on each of the basal and secondary joints. The sixth pair of 
appendages are very broad and short, in form»somewhat like the segment 
of a circle, and furnished with one long and two short sete. 
Hatitat.—-At Seafield near Leith. Obtained by washing some black 
sandy mud uear low-water mark. 
Remarks.—This large and fine species is readily distinguished from 
any other British Ameira by the pyriform candal stylets; and, on dis- 
section, by the other characters referred to in the description. 
Ameira exigua,* sp.n. (PI. VI. figs. 15, 23.) 
Description.—Female. Length, -47 mm. (grd of an inch). Rostrum 
prominent. Anterior antennz sparingly setiferous, rather slender, and 
eight-jointed. The second joint is longer, and the penultimate one shorter 
than any of the other joints. The proportional lengths of the joints are 
nearly as shown by the annexed formula :— 
Pip de Pea ok 6S 
ears <a Sener ere it = 8 * 
Posterior antenne and mouth organs nearly as in Ameiva reflexa. The 
first pair are moderately stout. The inner branches are of considerable 
length, but the outer branches are short, and do not reach the end of the 
first joint of the inner branches. The second joint of the inner branches 
is small, while the end joint is elongate and slender; but the second 
and third joints together are scarcely equal in length to the first 
joint (fig. 20). In the fourth pair the outer branches are long, and 
inner branches short; the inner branches scarcely extend beyond the 
end of the second joint of the outer branches (fig. 21). The fifth pair are 
foliaceous, small. The produced inner portion of the basal joint is broadly 
sub-conical, and furnished with five terminal and sub-terminal set ; the 
second one, from the outside, is considerably longer than any of the others. 
The secondary joint is broadly ovate, and extends halfway beyond the end 
of the basal joint, and bears several sete of unequal length round the 
outer margin and apex, but the inner margin is ciliated (fig. 22). Caudaa 
stylets shorter than the last abdominal segment, and about as long as 
broad. The principal seta of each stylet is stout, and longer than the 
abdomen (fig. 23). 
Habitat.—Off St Monans. Not very common. 
Remarks.—This very small but distinct species somewhat resembles 
Ameira exilis and Ametra longipes, Boeck. It differs from one in being 
not only much smaller and comparatively more robust, and in the anterior 
antenne being eight instead of nine-jointed, but also in the form of the 
mandible-palp and the structure of the fourth pair of swimming-feet, and 
from the other by the structure of the mandible-palp and the fifth pair of 
feet. 
* Exiguus=small, 
