124 
EICHAED ASSHETON. 
form is shorter and broader, and luis a smaller] body in pro- 
portion to the size of the lophophore than L. loxiilina. 
The curious gland-like processes are quite different. They 
are less numerous and far larger in the Skye species, in whicli 
I have never found more than two present. Tliey arise from 
the ventro-lateral surface about half way down tlie body — 
whereas in L. loxalina there are usually four pairs set more 
on the lateral edges. They resemble very closely the flask 
organs of L. Davenporti, but are larger and placed higher 
up on the body. 
In the Skye species these curious organs maybe altogether 
wanting, or one alone may be present. They are peduncu- 
late, whereas in L. loxalina they are partially sunk beneath 
the surface. Specimens with buds, which buds arise from 
the ventro-lateral surface anterior to the spikes, are found 
with or without spikes, so that there is no correlation between 
these organs and the buds. Figures 15 and 16 represent 
sections taken rather obliquely through these organs. It 
will be seen how in flg. 15 the epiblast is ruptured at one 
side, thus indicating how easily they may become detached. 
They are in all cases entirely epidermic. 
The character which suggests the name I propose for the 
species Loxosoma saltans is the peculiar mode and highly 
developed power it possesses of locomotion. When freshly 
taken it is extremely active, moving over the body of the 
worm or along the lining of the tube in a manner fascinating 
and unique by a series of gymnastic efforts, which combine 
the agility of the kangaroo and the deliberation of a geometer 
caterpillar. 
It is possibly in correlation with this habit that there is a 
modification of the lophophore, which is not perfectly circular 
as is usual among the Entoprocta (except L. loxalina), but 
is elongated in the oro-anal plane, and shows a slight 
tendency to a separation into right and left halves, and is 
inflected along its oral region (fig. 19). 
The tentacles, as a rule, number sixteen, so that we have a 
right and left series of eight very slightly separated from 
