64 MARINE BIOLOGY OF THE SUDANESE RED SHA. 
The spicules of the lower cortex do not differ from those of the upper 
cortex in form or colour. 
The following measurements were taken of length and breadth in milli- 
MEN ES, S— 
Spindles: 0°75 x 0:075 ; 0°'7 x O'1; 0°65 x 0:05 ; 0°6 x 0:05 ; 0°5 x 0°03 ; 
NASON EROS 0703 5 Ox 03: 
Clubs: 06 x0:1; 0:4.x0:1 5. 0:3 <0 310:35 <0:075 7023 ><'0: ion 
The canal-walls are without spicules. 
Some other specimens agreed with the above in general structure, in the 
nature of the ‘“ Stiitzbtindel,” in the armature of the anthocodia, in the spicules 
of the cortex, and so on. Thus one could not but admit that all the colonies 
belonged to the same species, and yet it was impossible to say that the polyps 
were really grouped in bundles, which is one of the diagnostic features of the 
genus Spongodes. In some cases they were arranged on a terminal branch in 
a catkin-like or spike-like manner. This was the rule in one specimen. 
It may be noted that Kiikenthal admits that certain specimens were inter- 
mediate in this respect between Spongodes and Nephthya, and consequently 
difficult to place. 
The point to be noted in these colonies is that, though obviously all of the 
same species, yet they differ in a generic feature ! 
If we take a composite view of all the specimens this species combines the 
characteristics of both Spongodes and Nephthya. Yet the colony described 
in detail must be placed in the glomerate division of the genus Spongodes. 
Within that division it seems to represent a new species. 
Locality. —Suez Bay. 
SPONGODES PHARONIS, n. sp. (Plate 5. figs. 2 & 3.) 
Several colonies of the umbellate type, agreeing with Kiikenthal’s rubra- 
group in having branches of approximately equal length, with the upper 
surface practically even. They differ from any of the species of Spongodes 
hitherto described from the Red Sea—viz.: S. savignyi, S. hemprichi, S. klunz- 
ingert, 8. arborea, S.mayi, S. hartmeyeri, and S. ehrenbergi—in possessing the 
following combination of diagnostic characters :— 
a. The umbellate development of the colony. 
h. The absence of spicules on the tentacles. 
c. The absence of spicules in the canal-walls. 
d. The occasional presence of a strongly developed spine or sometimes 
of two spines projecting prominently beyond a corymb of polyps, 
greatly exceeding in diameter and in length the “ Stiitzbtindel ” 
spicule or spicules which project beyond the anthocodia of each 
polyp. 
