40) AGLAOPHENIA RHYNCHOCARPA. 
strongly marked septal ridge on a level with the intrathecal ridge, and 
with a less distinct one at the base of the supracalycine nematophores. 
Hydrothecee deep, with strongly dentate oblique margin, and with the 
intrathecal ridge extending obliquely upwards across the entire width of 
the hydrotheca. Supracalycine nematophores strong, overtopping the 
hydrotheca; mesial nematophore attaining nearly the level of the margin 
of the hydrotheca, and adnate to it for nearly its entire height; cauline 
nematophores forming a longitudinal series on front of the stem. 
Gonosome not known. 
Florida Reef, from a depth of from 2 to 3 fathoms. 
This is a tall-growing species, with a loose, somewhat straggling habit. 
In the absence of all knowledge of the gonosome, its reference to Aglao- 
phenia is only provisional. 
Aglaophenia rhynchocarpa. 
Pl. XXII. Figs. 5-8. 
Trophosome. — Hydrocaulus attaining a height of about two inches, 
non-fascicled, simple, springing in dense plumose tufts from a network 
of tubular fibres; internodes of pinne divided transversely by three or four 
strongly marked imperfect septa. Hydrothecz incurved in front, margin 
deeply dentate with the anterior tooth strong and bifid; intrathecal ridge 
well marked, stretching obliquely upwards across the entire width of the 
hydrotheca. Supracalycine nematophores slightly overtopping the margin 
of the hydrotheca; mesial nematophore adnate for nearly its entire length 
to somewhat less than the proximal half of the hydrotheca. 
Gronosome. — Corbulz closed, with the rachis continued beyond the distal 
end in the form of a beak; leaflets each with a strong process at its base 
directed outwards and towards the distal end of the corbula; nematophoral 
ridges not risimg in prominent crests. 
Key West, Triangle Shoal, 3 to 4 fathoms. 
This is a very beautiful species, and presents several well-marked char- 
acters. The hydrothecz are rendered striking by their rather prominent 
base giving rise to a sinus-like depression of the anterior wall, and by 
the bifid anterior tooth of the margin. It is, however, in the corbula that 
the most marked characters are to be found. The prominent beak-like 
distal extension of the rachis forms a striking feature, while the processes 
