- 
nb) 
8. Stylaster multiplex sp. n. Plate I, figs. 11 and 12. 
Stat. 94. 5 
oe ee, Ils. 450 M. 1 colony. 
Statwi77()s 2224e5S. og 18; 
. of Ceram. 1633 M. Several fragments. 
The branches of this species are flabellate, but they are closely set one above the 
other, as is well shown by the very complete specimen obtained from Stat. 94 (Fig. 11). None 
of the branches anastomose. The height of the colony is 35 mm. the breadth about 40 mm. 
the diameter of the base of the stem, before it spreads out to attach itself to the substratum, 
4 mm. The young branches are very zigzag in their course. The colour is a yellowish white, 
the surface smooth except for dotted, irregular longitudinal striations. The cyclosystems are 
slightly inclined towards one surface. S. mué@tiplex is a transition stage between those species 
that have a complete cyclosystem (i.e. with no dactylozooids atrophied) turned to the side, 
such as S. de//a, and those like S. “@atus which have the cyclosystems on one surface only. 
For further discussion of this point see p. 17. In S. multiplex the cyclosystems are about 1,5 
by 0,8 mm. diameter and two successive cyclosystems on the same side of the stem are 2,8 mm. 
apart. The gastropore is deep, the septa wide. The ampullae are developed in ones, twos, 
threes, or fours, close to a cyclosystem on the anterior or posterior surface of the flabellum. 
This species may be defined: 
Hydrophytum subflabellate; cyclosystems complete, slightly inclined towards one surface; 
gastropore deep. 
9. Stylaster minimus sp. n. Plate I], figs. 13 and rq. 
Stat. 150. 0°6’N., 129°7'.2 E. Djilolo Passage. 1089 M. One small fragment. 
Only one very small fragment of this delicate deep sea coral was found. So far as can 
be observed in a piece of such small size it is regularly flabellate and the branches do not 
anastomose. The height of this fragment is about 10 mm., the diameter of the thickest part 
of the stem 1 mm. The colour is white. The surface appears to be quite smooth in spirit, 
but when it has been calcined it is seen to be slightly rough. The cyclosystems are all turned 
towards one surface of the flabellum; their edges are slightly crenate and they are 1 mm. 
by 0,8 mm. in diameter. The gastropore is fairly deep, but is not curved down the stem; the 
gastrostyle is therefore visible from the exterior, though it is not placed at the centre of the 
base of the gastropore but further down towards the base of the stem. The septa are wedge- 
shaped; the interseptal spaces are narrow. The cyclosystems are 1—4 mm. apart. A branch 
arises in the axil of each cyclosystem. No ampullae are visible. 
This species closely resembles S. ¢/¢atus in external characters (except for the difference 
in size) and Stylaster (Stenohelia) profundus, but may be readily distinguished from both by 
the comparative shallowness of the gastropore a Mosetey |.c. Plate XII, fig. 4). S. mecnemus 
is still more delicate than the type specimens of S. Arofundus in the British Museum. 
This species may be defined: 
Hydrophytum flabellate (or subflabellate?) delicate; surface smooth; cyclosystems all 
directed towards one surface; gastropore not very deep or curved far down the stem. 
