HICKSON AND ENGLAND—STYLASTERINA. 351 
Genus CRYPTOHELIA. 
8. Cryptohelia ramosa, H.& FE. 
Cryptohelia ramosa, Hickson & England, Siboga-Expeditie, Mon. viii. 1905, p. 21, pl. ii. figs. 22, 23. 
There is only a small specimen of this genus in the collection, 9 mm. in height 
and 14 mm. in width. It was obtained off Salomon Atoll, Chagos Archipelago, in 
120-150 fms. 
It is difficult to identify the species from such a small specimen, but it seems to be 
undoubtedly most closely related to Cryptohelia ramosa, obtained by the ‘ Siboga’ in 1165- 
1264 metres off N.E. Celebes. The cyclosystems are oval and their diameters about 
1:12 mm. X 0°8 mm., z.e. rather smaller than those of the type specimen. 
Genus CONOPORA. 
9. Conopora tenuis, Moseley. 
Conopora tenuis, Moseley, Chall. Zool. vol. ii. pp. 82 & 97, pl. xii. figs. 5a, 6, c (off Kermadec 
Isls., 520 fms.). 
The species was also obtained by the ‘Siboga’ Expedition in 469 metres off Ceram 
(t. c. p. 25). 
(1) Salomon Atoll, Chagos Archipelago, 120-150 fms. Several specimens, the largest 
3°2 cms, in height. 
(2) Providence I., D7, 75 fms. One “dead” specimen. 
Several of the specimens from the Salomon Islands have female ampulle, which appear 
as globular swellings easily seen by the naked eye. Frequently more than one trophodisc 
occurs in anampulla, asin Cryptohelia. The planula, as it develops, becomes bent within 
the ampulla. This condition also occurs in Cryptohelia. 
10. Conopora dura, sp.n. (Plate 44. figs. 9, 10, 11.) 
Providence I., D 8, 125 fms. Two pieces. 
The species is probably flabellate in growth and the branches do not anastomose. The 
height of the colony was probably about 45 mm. and the width 70 mm. The branches 
are thick, obtuse, and slightly flattened in the plane of the flabellum. The diameter of 
the thickest part of the main stem is 8 mm. and of the branches at a distance of 4 mm. 
from their apices about 4 mm. x 3°5 mm. 
The colour is white and the surface is smooth, except fora number of small nematopores 
(fig. 10, nem.) with slightly raised lips which are distributed between the cyclosystems. 
The cyclosystems are irregularly distributed on all sides of the branches and main stem. 
The shape of the cyclosystems is also irregular but usually oval (1°3 mm. xX 1:1 mm.), the 
greater diameter being at right angles to the axis of the branch. There are about twelve 
septa of different sizes, the larger and thicker being usually directed towards the base 
of the branch (fig. 10). 
The gastropore is, as in other species, a large open cup (fig. 11) divided into an upper 
(larger) (z.c.) chamber and a lower chamber (/.c.) by a horizontal septum (h.sept.) with a 
