84 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
gonothecze, but probably belong to this species, as they agree with the 
description by Nutting *. 
Locality.— Suez Bay, 10 fathoms. 
SYNTHECIUM MALDIVENSE, Borradaile f. 
The present specimens are about 6 inches in height, composed of a stem, 
having hydrothecee, 3 to an internode, and branches, bearing groups of 
hydrothece in pairs, 2 or 3 pairs to a group. The hydrothecze have a hooded 
appearance when the upper valve of the operculum is open, but when closed 
are seen to have a point on either side. There are no gonothecz present. 
Locality.— Floating stage, Suez docks. 
Family PLUMULARIID&. 
PLUMULARIA SETACEA, Lillis. 
A few colonies growing on coral. 
Locality —Khor Dongola. 
PLUMULARIA ALTERNATA, Nutting t. 
Present in small quantity only. 
Locality —Coral-reef, Khor Dongola. 
PLUMULARIA HALECIOIDES, Alder §. 
There is a good quantity of this form. 
Locality.—Suez dock, floating stage. 
LYTOCARPUS PHILIPPINUS (Kirchenpauer) ||. 
One colony only is present. 
Locality.—Suakim Harbour. 
LyrocaRPus (?) HORNELLI, Thornely 4). 
These specimens, which are very fragmentary, are of a much more sub- 
stantial nature than those collected from off the coast of Ceylon. The 
branches bearing hydrocladia are polysiphonic at their bases like the stem. 
What are described in the Ceylon report] as strings of nematophores, 
alternating with the hydrocladia on the branchlets, are now seen to be 
complete hydrocladia, as hydrothecz are also present along with the nemato- 
phores. 
* ¢ American Hydroids,’ 1904. 
+ ‘Fauna and Geography of the Maldive and Laccadive Archipelagoes,’ vol. ii. pt. 4. 
{ ‘American Hydroids,’ pt. 1. 
§ Ann, & Mag. Nat. Hist. ser. 3, vol. iii, (1859). 
|| Ueber die Hydroiden Familie Plumulariide, pt. 1 (1872). 
4, Herdman’s Report on Ceylon Pearl Fisheries—Suppl. Rep. viii. p. 123. 
