556 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
Spicules.—Long, very large, warty spindles, longitudinally placed 
in the walls of the stem, branches and calyces. The latter are quite 
large, and distinctly overtop the polyps, the spicules arising in two or 
more bundles on the outer side of the calyx wall. There is a strongly 
marked collar of spicules below the tentacle bases. Above the collar 
are large spicules sometimes arranged en chevron, sometimes without 
apparent regularity, that form a pseudo operculum. ‘The tentacles 
bear on their dorsal surface a double row of small transverse spicules. 
Largest spicules in calyx wall 24 mm. long. 
Color.—Very pale, almost white in alcohol. There is no reddish 
tinge whatever. 
Distribution.—North coast of the island of Maui; Station 4101, 
122-143 fathoms (type, Cat. No. 25361, U.S.N.M.); Station 4098, 
95-152 fathoms (Cat. No. 22544, U.S.N.M.). 
This species belongs to the “ Divaricate ” group of Spongodes. In 
one specimen from Station 4098 the spicules of the pseudo operculum 
are bright crimson in color, but there appears to be no other impor- 
tant difference between this specimen and the others. 
The species 1s named after Mr. A. B. Alexander, Fisheries Expert 
-on the Albatross during the Hawaiian cruise. 
GenvissS le Hi@iIN GG © RGIeAgSIKCollikceic: 
Walls between stem canals with numerous spicules. Colony 
branched, externally resembling a gorgonian. Coenenchyma abun- 
dant in walls of canals and filled with large spicules. Tentacles 
retractile. 
SIPHONOGORGIA COLLARIS, new species. 
Plate XI, fig. 4. 
Only a fragment of this species was secured, consisting of the ter- 
minal portion of a thick branch, 6 mm. wide by 13 mm. long. The 
canals are numerous and irregular, with long spindle-shaped spicules 
and also minute spindles in their walls. The polyps are thickly 
clustered over the entire surface, reminding one of the end of a 
branch of Acropora muricata forma prolifera. 
The calyces are prominent, 34 mm. high by 14 mm. in diameter 
at the middle, tubular, narrowing gradually at the distal end. The 
whole surface is packed with quite large, stout, warty spicules ar- 
ranged longitudinally both in the coenenchyma and calycular walls. 
In the latter there is a distinct circlet of rather slender but large 
spicules, below which the spicules are stouter and sometimes resemble 
imbricating scales. 
The polyps have a thick collar of curved transverse spicules which 
is much wider and more conspicuous than usual: Above the collar and 
