138 
RICHARD ASSHETOX. 
of which organs there are usually four pairs, giving a some- 
what angular appearance to the calyx. It was found living 
cornmensally with a Maldanid worm (which was not identified) 
on the Morven shore of the Sound of Mull in Scotland. 
(2) Loxosoma saltans n.s. — Lophophore lai’ger than the 
body and bears sixteen tentacles, of which four are longer 
than the others and are moved separately, and are always 
outside and over the others when contracted. They bear 
stiff hairs on the outer edge of their tips. Asin L. 1 oxalina 
the oral part of the lophophore is indented. The specific 
name indicates its habit of locomotion by jumping, in which 
action the four large tentacles take a part. The stalk is 
shorter, or only slightly longer than the calyx, and terminates 
in a circular foot as in L. loxalina. There is no foot-gland. 
The glandular diverticula of the alimentary canal are highly 
developed. The body has two ectodermal organs, or less, 
which are pedunculate and attached to the ventro-lateral 
surface just below the buds. They are larger and placed 
higher than the corresponding organs of L. Davenporti. 
I'he species was found in the tube of a Maldanid worm 
Clymene ebiensis on the Skye shore of the Kyle of Loch 
Alsh in Scotland. 
(3) The alimentary canal of L. saltans is differentiated 
more markedly into glandular, absorptive and excretory 
regions than L. loxalina. Two very distinct pro.ximal 
diverticula appear to secrete some substance into the cavity 
of the gut, probably digestive in action; a more distal pair of 
diverticula seem to be more of the nature of a liver. The 
whole alimentary canal is a single layer of cells. 
(4) The nervous system consists of the usual pair of ganglia 
in both species. In L. saltans the main nerves can be 
traced to lophophore, body-wa.ll, kidneys and gut. Sensory 
hairs occur on the tentacles. A chain of cells along the stalk 
may be nervous. 
(5) In L. saltans the excretory organs are divided into (i) 
lophophoral and (ii) bod 3 ’-kidneys, which are large vacuolated 
cells which perhaps lie in contact with ducts, but the external 
