58 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
occasionally as far north as off the coast of Portugal. It 
can be distinguished at first glance from any of its Appen- 
diculate brethren by the peculiar scroll-like manner in 
which its slender lanceolate flabellum is rolled upon 
itself when the animal is at rest. (When examined under 
a magnifying power of about 100 diameters, the internal 
ceconomy of this form is seen to differ widely, as regards 
its respiratory arrangements, from any of the known 
species. The oval (sic; oral?) half of the globular body 
contains a large branchial sac, with a ganglion and otolithe 
in the usual positions in its anterior paries, but with its 
posterior lining-membrane folded into a gill-lhke structure, 
wide in the centre and tapering to either end, extending 
from the posterior lip of the branchial orifice to a point 
close to the insertion of the appendix, and presenting a 
double series of narrow transverse slits, which give the 
whole structure a general resemblance to the respiratory 
diaphragm of Dolvolum, though on a lengthened and much 
more minute scale. The last curve of the intestine lies 
transversely across the centre of the body, above a glob- 
ular ovary, and terminates on the right side in a papilla, 
through which the rectum opens. The main nervous 
trunk, descending from the ganglion, curving round the 
stomach, and entering the appendix, presents no distinc- 
tive peculiarities.” 
Naturally a form so remarkable as this description 
indicates has excited much interest, and has lent itself 
very conveniently for the purposes of phylogenetic specu- 
lation. Moss himself referred to it in a later paper* as a 
connecting link between the Appendicularians and Doli- 
olwm, and Professor Herdman, in the summary appended 
* Notes on the genus Doltolum ; Quart. Jour. Mier. Sci., xi. (N.S.) 1871s 
p. 405. 
