PROF. THOMSON AND MR. McQUEEN—REPORT ON THE ALCYONARIANS. 49 
Order I. STOLONIFERA, Hickson. 
CLAVULARIA PULCHRA, Thomson and Henderson (1906). 
See J. Arthur Thomson and W. D. Henderson: “ Alcyonaria of Zanzibar and British 
East Africa from Collections made by Cyril Crossland,” Proc. Zool. Soc. 1906, p. 405. 
A large colony growing on a pearl-oyster shell and on the stone to which 
the shell is attached. 
The polyps, which arise from a strong basal membrane, are large and 
substantial ; the body varies from 10 to 30 mm. in length, and from 2 to 
3°) mm. in breadth ; the tentacles are 5 to 10 mm. in length. ‘There is a very 
marked hypostome, about 1 mm. high. There are 28 pinnules on each side 
of a tentacle, and they are for the most part very long and slender. In some 
cases, however, they are almost wart-like. This diversity depends in this 
case on the degree of contraction. 
The whole surface of the colony glistens with calcareous rods; the fol- 
lowing measurements were taken of their length and breadth in milli- 
metres :—0°054 x 0:018 ; 0:09 x 0:02. 
Loeality.—Khor Dongola, 10 fathoms ; previously recorded from Zanzibar 
shore. 
SYMPODIUM FULVUM (Forskdal). 
=Lithophyton fulvum, Forsk§l (1775). 
Sympodium fulvum, Ehrenberg (1884). 
See W. May: “ Beitrige zur Systematik und Chorologie der Aleyonaceen,” Jenaische 
Zeitschr. Naturwiss. xxxili. (1899) p. 52. 
W. Kiikenthal: “ Ueber einige Korallenthiere des roten Meeres,” Festschrift yon 
E. Haeckel, 1904, p. 41. 
A large number of specimens seem to be referable to this species, the only 
noteworthy difference from the type being that the general spicules of the 
coenenchyma are not visible to the naked eye. A characteristic feature is the 
armature of the polyp-body, which consists of eight double rows of spicules 
arranged in chevron, and with some horizontally disposed spicules at the 
bases of the rows. According to Kiikenthal, this type should be referred to 
Aleyonium. 
Locality Very abundant about Matala Island in Khor Dongola, one of 
the richest pearling shallows. Previously recorded from the Red Sea and 
Hast Africa (Tumbatu). 
TUBIPORA PURPUREA, Pallas. 
The differences between alleged different species of Tubipora remain in a 
very unsatisfactory stage of definition. Emphasis has been laid, for instance, 
on the number of pinnule-rows, But our specimen shows with equal clearness 
polypes whose tentacles have a single row on each side, and polyps whose 
tentacles have a double row on each side. The difference is in this case due 
