194 Proceedings of the Royal Physical Society. 
the basis of the -tentacles and the mouth. The tentacles were twelve in 
number, of a rich umber brown colour. About one-half of each from the 
base was marked with five opaque pale-yellow lozenges, and from thence 
to the top by four bands of the same pale-yellow colour. The brown 
matter consisted of amorphous, pigment granules, the yellow matter of 
highly refractive and exceedingly minute molecules, apparently calca- 
reous. Each tentacle was curved backwards, and resembled the abdomen 
of a wasp. The pigment could be forced through the top of the tentacle by 
pressure, indicating an opening at that part. The mouth, instead of being 
linear, as in the Actinias, tended to assume a quadrangular, or crucial 
form, though the constantly varying shape of the disc rendered a descrip- 
tion of it difficult. The stomach was very peculiar, and differed from 
that of the Actinias. It was a flat and 
obscurely quadrangular sac in transverse 
section (fig. 1.) Its angles he should de- 
scribe as superior (a), lateral (6), and in- 
ferior (c.) The superior angle was con- 
nected to the parietes of the body by four 
septa ((i), the lateral angles each by one 
septum (e), and the inferior angle by two 
septa {f.) These septa were continued 
downwards, as in the actinias, to the lower 
extremity of the body, and had their free 
edges bordered by a convoluted ciliated 
band, furnished with cnidae, or thread-cells. 
The stomach and parietes were further con- 
nected by four intersepta {g), as he should 
call them — one between each of the lateral 
and anterior angles of the stomach, and 
one between each of the lateral and pos- 
terior angles ; but these intersepta bore no 
convoluted bands. The septa probably bore 
ovaries, or sper maries, the intersepta not, in which case the reproductive 
system of the animal now described agreed in simplicity with that of the 
polyp of the Alcyonidas, which had only eight septa, each bearing ciliated 
bands. The upper part of each of the septa and intersepta was perforated 
by an oval opening, so as to give an uninterrupted passage beneath 
the tentacles to the circulation of the fluids of the body. By tracing 
this passage in the Lucernarias, he had come to the conclusion that 
it was the homologue of the circular canal of the gymnophthalmatous 
medusa. The attachments of the stomach thus resembled those of the 
same organ in the other Helianthoid and Alcyonian polyps, but in shape 
it widely differed from these. In Actinia and Alcyonia the stomach was a 
flattened sac, open, and evenly truncated at its lower extremity. In the 
animal now described the lower border of the stomach curved gently 
downwards from the superior to the lateral angles (fig. 2, a 6), and from 
the lateral to the inferior angle it bent deeply and abruptly downwards 
Fig. 1. 
Diagram of transverse section 
of H. Fultoni : — a, superior angle 
of stomach ; b b, lateral angles of 
ditto ; c, posterior angle of ditto ; 
dddd, e e, ff, septa ; and, g g g g, 
intersepta, uniting stomach with 
parietes. 
