1862.] DR. J. E. GRAY ON THE CLAVIFORM SEA-PENS. 31 
The whole substance of the coral is loosely cellular, and the lobes 
of the head are brittle and easily broken off when in spirits. The 
base of the stem is furnished with some large tubular fibres, which 
seem to act as roots to attach it to rocks. 
The spicules on the edge of the polype-cells are rugulose or spi- 
nulose. 
MorcHELLANA SPINULOSA. (Woodcut, p. 30.) 
Hab, Indian Ocean. 
4, NoTes ON SOME SPECIMENS OF CLAVIFORM PENNATULID 
(VERETILLEX) IN THE COLLECTION OF THE BritisH 
Museum. By Dr. Joun Epwarp Gray, F.R.S., V.P.Z.S., 
F.L.S., &e. 
Since my paper, entitled “‘ Revision of the Family Pennatulide, 
with description of some New Species in the British Museum,” 
was printed in the ‘Annals and Magazine of Natural History ’ 
for January 1860, we have received several specimens of club-shaped 
Sea-Pens (Veretillee) which further illustrate the species of this 
roup. Bien 
c Prateaior Milne-Edwards, in the first volume of his ‘ Coralliaires,’ 
published in 1857, divides the Claviform Pennatule into three genera, 
thus— 
1, Lirvarta, with a distinct, well-developed, quadrangular central 
stony axis. 
2, VERETILLUM, with a rudimentary hard central axis. 
3. CAVERNULARIA, without any hard central axis, but with four 
large longitudinal central cells. 
Dr. Herklots, in his “‘ Monograph of the Pennatulide,” in the 
‘Bijdragen tot die Dierkunde’ for 1858, divides them into four 
genera, adding the genus Sarcobelemnon to the above list. The 
species of Lituaria and Sarcobelemnon are found in the Indian and 
Australian Oceans, and those of Veretillum and Cavernularia are con- 
fined to the Mediterranean. eres 
The Veretillee in the British Museum appear to belong to only 
two genera, viz.— 
1. VerRETILLUM. The club with a short thick base, with four 
more or less large longitudinal cells in the centre. 
2. Lirvaria. The club with an elongated base, and with a strong, 
subquadrangular, central, more or less stony axis. 
The former group seems to be synonymous with the genera Vere- 
tillum and Cavernularia of Milne-Edwards and Sarcobelemnon of Her- 
klots. I call the first genus by the name Veretillum, because I find 
that the specimen of Pennatula cynomorium which we have in the 
British Museum does not appear to have any rudiment of an axis, 
and has the four large longitudinal cavities in the centre of the coral 
