LAURA R. THORNELY—REPORT ON THE HYDROIDA. 83 
bending to left and right alternately and giving off a hydrotheca at each 
bend, or sometimes instead of a hydrotheca a long weak-looking tendril, 
these last are all to be seen on the lower portion of the stem. Hydrothecz 
deeply cylindrical, borne on ringed pedicels, resting on an elbow of the stem. 
Pedicel with 2 to 6 rings, but usually with 4; margin of the hydrotheca with 
about 10 crenulations meeting the conical operculum at its base. The sides 
of the hydrotheca slightly fluted on its upper half and corrugated about six 
times below. Gonothecee not present. 
This species very much resembles figures of Lovenella clausa, but the 
corrugated hydrotheca is a marked difference between the two species. 
Locality Khor Dongola, 20 fathoms. 
CALYCELLA ? sp. (Plate 9. fig. 5.) 
A minute form, without rings to the short pedicel, creeping over a Peri- 
gonimus colony. 
Locality.—Khor Shinab, 10-12 fathoms. 
Family SERTULARIIDA. 
SERTULARIA MINIMA, 1A. W. Thompson”. 
This species is well represented, covering a seaweed with its interlacing 
stolons, from which stems, composed of 5 pairs of hydrothecee at most, rise to 
the height of } of an inch merely. They are unbranched; the whole is 
coloured like the seaweed, a bright straw-colour. 
The pairs of hydrothecee are united in front and set far forward on the 
stem and their 2 lateral, marginal teeth, when not concealed by the operculum, 
are conspicuous. As there are no gonothece to help in the identification of 
the species, this full description becomes necessary. 
Locality—F loating stage, Suez docks. 
DIPHASIA MUTULATA (Bush) f. 
Several unbranched colonies 24 inches in height, attached to a Lytocarpus. 
The stem and branches in the specimens are jointed. No gonothece are 
present. 
Localities.—Floating stage, Suez docks ; and Suez Bay, 5 fathoms. 
THUIARIA TUBULIFORMS (Marktanner- Turneretscher) ft. 
The present specimens are not more than 1 inch in height and have no 
* Ann. & Mag. Nat. Hist. 1879, 
+ Voyage of the ‘ Rattlesnake,’ 1852. 
{ Hydroiden des k.-k. naturhist. Hofmuseum, 1890. 
