NO. 1624. DESCRIPTIONS OF HA WAIIAN ALC YON ARIA— NUTTING. 559 



Zooids. — Much less numerous than is usual in this genus. There is 

 a row of eight to twelve on ventral side at junction of each leaf with 

 the rachis, each zooid being surrounded by a circlet of spicules con- 

 verging at their distal ends. 



Color. — Bright yellow throughout. 



Tijpe.—C2ii. No. 22579, U.S.N.M., Alhafrosfi station 4101, between 

 Molokai and Maui, 122-143 fathoms. 



Distribution. — Between Molokai and Maui : Station 3859, 138-140 

 fathoms (Cat. No. 22576, U.S.N.M.). 



Between Maui and Molokai: Station 3864, 163-198 fathoms; Sta- 

 tion 4102, 122-132 fathoms (Cat. No. 22578, U.S.N.M.). 



Off Laysan'Island: Station 3957, 173-220 fathoms (Cat. No. 22581, 

 U.S.N.M.). 



Northwest coast of the Island of Hawaii: Station 4079, 143-178 

 fathoms (Cat. No. 22577, U.S.N.M.). 



The specimen from Station 3864 was 10|- inches long. 



PENNATULA PALLIDA, new species. 

 Plate XLI, figs. 9 and 10. 



Largest specimen 175 mm. long; stem to first rudimentary leaf 28 

 mm. ; rachis, including portion bearing the rudimentary leaves, 112 

 mm. long. The stem is swollen at the base, with another bulging j)or- 

 tion about 25 mm. above the end bulb. 



Functional leaves nineteen on each side, long, much narrower pro- 

 portionally than in other species, 11 mm. long, 4 mm. broad at base, 

 recurved. 



Polyps usually four to each leaf, short, the calyces inclined toward 

 the distal ends of the leaves so much that the outer side of one is 

 adnate to the inner side of the next one nearly to the margin of the 

 former ; margin flaring, with about eight acute spines. Calyces 2 mm. 

 long on inner side, and 2 mm. broad. 



Spicules. — The spicules of this species are large and conspicuous, 

 of the usual needle-shaped type, crowded over the entire surface of 

 rachis, stem, leaves, and calyces, their points often projecting, giving 

 a harsh, hirsute appearance under a low magnification, except on the 

 lower part of stem, which is comparatively smooth. The spicules are 

 crisscrossed in every direction on leaves and lower part of calyces, 

 but on the upper parts of the calyx walls they are vertical, and 

 arranged in eight rib-like bands which project upward into the eight 

 marginal teeth. The tentacles are without spicules. 



Zooids. — A row of about a dozen zooids joins the adjacent leaf 

 bases on the ventral side of the rachis. There are other but shorter 

 rows on the latero-dorsal ridge, which is plainly marked in this 

 species. The hirsute appearance of the rachis, already referred to, 

 makes it difficult to count the zooids with certainty. 



