256 
Part III. — Tenth Annual Report 
is prominent and has the apex somewhat tri-lobed ; the middle lobe 
projects forward considerably beyond the lateral ones. 
It has been obtained from various parts of Great Britain. The following 
are some of the localities — Off the Island of C umbrae ; at Portincross, 
Ayrshire ; Mulroy Loch, Donegal (G. S. Brady) • Oban (A. M. Norman) ; 
East Loch Tarbert, Loch Fyne (Mini). Laophonte horrida, so far as I 
have been able to know its habits, is no swimmer, but appears to frequent 
the muddy roots of weed and zoophytes, among which it crawls and finds 
food and shelter • it is usually more or less coated with mud. 
Laophonte inopinata* n. sp. (provisional name). (PI. XI. figs. 1-12.) 
Female. — Length, exclusive of caudal setae, '5 mm. Viewed dorsally, 
the body is elongate and becoming gradually narrower posteriorly, com- 
posed of ten segments, the first segment about as long as the next three 
together, and furnished with a few small spinous setae at the antero- 
lateral angles. Rostrum short, obtuse. Anterior antennae short and stout, 
six-jointed, the first three joints large, subequal, the fourth and fifth small. 
The proportional length of the joints are as in the annexed formula 
7 ' 8 • 7 • 2 • 2 • 6 • 
1 • 2 • 3 ' 4 • 5 1 6 
The fourth joint produced on one side to form the base of an elongate 
olfactory filament. Posterior antennae stout, three-jointed, with four long 
geniculated terminal setae and one short curved terminal spine. The 
margin of the last joint is also fringed with short hairs and provided 
with a spine near the distal end. The secondary branch, which springs 
from near the middle of the second segment of the primary branch, is 
small, one-jointed, furnished with one marginal and three short, plumose 
terminal setae. Anterior foot-jaw small, two-jointed, armed with a 
terminal clawed spine and two elongate marginal lobes. Posterior foot- 
jaw two-jointed, and bearing a long terminal claw. The first pair of 
swimming feet nearly as in L. similis. The second, third, and fourth 
pairs nearly alike, moderately stout ; fifth pair small. The basal joint is 
furnished with several small marginal hairs, a moderately long plumose 
terminal hair, and three sub terminal, spinous setae toothed near the 
extremity; the second joint small and provided with one long and four 
short terminal hairs. Caudal stylets short, each with a long curved, 
spreading terminal seta, beset for two-thirds of its length with numerous 
wooly-like curled filaments ; a short terminal seta plumose on one 
side ; and a few very short hairs. The integument is thickly covered 
with minute hairs, and the posterior margins of the body segments are, 
besides being fringed with cilia, furnished with a number of small hairs 
placed at regular intervals along the margin of each segment as shown in 
the enlarged figure. 
Male. — The chief difference between the female and male is in the 
form of the anterior antennae, which in the latter are distinctly hinged, 
and constitute powerful grasping organs. 
Habitat. — Washed from a large seaweed root brought up in the trawl- 
net a few miles west of May Island. Several <$ and $ specimens were 
obtained; some of the latter carried ovisacs. The long, spreading, and 
neatly curved caudal setae serve to distinguish this species at a glance, 
and especially so when examined under the microscope ; the wooly-like 
curled filaments with which they are covered give them a very striking 
character. 
* Inopinata, unexpected. 
