14 Goel 
CCELENTEKATA. 
Diphasia mirahilis^ Verrill, Tr. Conn. Ac. iii. p. 53. 
Desmoscyphus^ g. n. (Seratulariidce) Allman (3). Hydrocaulus jointed, 
each internode corresponding to one or more pairs of hydrothecae, which 
are adnate to each other in pairs and to the front of the hydrocaulus ; 
gonangia simple, borne along the front of the hydrocaulus. D. busJd, 
sp. n., id. 1. c. p. 265, pi. xiv. figs. 3-7 (New Zealand). [This genus is 
named Gemminella, Nature, xi. ; cf. Zool. Rec. xi. p. 528.] 
Synthecium, g. n. {Seodular tides), Allman (1871). Hydrocaulus divided 
into internodes, each internode carrying a pair of opposite sessile hydro- 
thecae ; gonangia supported upon peduncles, which spring from within the 
cavity of certain hydrothecae, where they take the place of the hydranth. 
S. elegans, id. 1. c. p. 266, pi. xv. figs. 1-3 (New Zealand). 
Thuiaria. Generic characters emended so as to include Sertularia 
argentea and cupressina: joints of hydrocaulus distant and irregular, 
numorous hydrothecco corresponding to each iiiternodo. 2\ crassieauUs, 
sp. n., Allman (3), p. 267, pi. xvi. figs. 1-5 (Japan) ; coronifera, sp. n., 
id. 1. c. p. 268, pi. xvii. figs. 1-3 (Japan) ; bidens, sp. n., id. 1. c. p. 269, 
pi. xviii. figs. 1 & 2 (New Zealand) ; dolicliocarpa, sp. n., id. 1. c. p. 270, 
pi. xix. figs. 3 & 4 (New Zealand) ; cerastium, sp. n., id. 1. c. p. 271, pi. 
xviii. figs. 3 & 4 (New Zealand) ; persocialis, sp. n., id. 1. c. pi. xvii. 
figs. 4-6 (Natal) ; cylindrica, sp. n., Clark (5), pp. 22'6, pi. x. fig. 57 
(Alaska) ; robusta, sp. n., id. 1. c. p. 227, pi. ix. figs. 53-55 (Alaska) ; plu- 
mosa, sp. n., id. 1. c. p. 228, pi. x. fig. 62 (Alaska) ; turgida, sp. n., id. 1. c. 
p. 229, pi. X. figs. 58-61 (Alaska) ; gigantea, sp. n., id. 1. c. p. 230, pi. x. 
figs. 63 & 64 (Alaska). 
Selaginopsis, g. n. (Sertulariidce), Allman (3) : allied to Grammaria. 
Hydrophyton consisting of a single axile tube, to which the hydrothecae are 
adnate, and on which they are disposed in several longitudinal rows. 
Gonosome unknown. S. fusca, sp. n., id. 1. c. p. 272, pis. xii. fig. 1, xix. 
figs. 1 & 2 (Japan.) 
Fericladium, g. n. {Sertulariidce), Allman (3). Hydro thecae more or less 
immersed and closely set round bifurcating ramuli, which spring from the 
sides of a common stem ; gonangia scattered, springing from between the 
hydrothecae. P. bidentatum, sp. n., id. 1. c. p. 273, pi. xx. figs. 1-4 
(Japan). 
PLumularia verrilli, sp. n., Clark (6), p. 64, pi. x. fig. 9 (Maine, 10-20 
fathoms). 
Halicornaria Busk (emend.). Hydrocaulus pinnate; hydrothecae usually 
with an intra-thecal ridge ; nematophores fixed ; mesial nematophore 
more or less adnate to the front of the hydrotheca, rarely free ; gonangia 
not included in corbulae or protected by gonangial ramuli, but carried 
on the common stem, or on more or less modified hydrothecal pinnae. 
Type, Plumularia setacea, Lin. H. saccaria, sp. n., Allman (3), p. 277. 
pis. XV. fig. 4, xxii. figs. 1 & 2 (Ceylon) ; insignis, id. 1. c. p. 278, pis. xxii. 
figs. 3 & 4, xxiii. fig. 1 (Ceylon) (referred to Macrorrhynchia ?, Nature, xi.; 
cf. Zool. Bee. xi. p. 528) ; bipinnata, id. 1. c. p. 279, pis. xxii. fig. 5, xxiii. 
fig. 2 (Ceylon) (= ? Taxella eximia, Alim., Nature, xi. p. 179 ; cf. Zool. 
Bee. xi. p. 528). 
Aglaophenia acanihocarpa, sp. n., id. 1. c. p. 274, pi. xxi. figs. 1-4 
