Manchester Memoirs, Vol. lix. (19 15), No. \. 11 



the interior of the stalk there are only a few minute 

 spicules. In the outer cortex and interior of the rachis, 

 and from the calyces, the spicules are also similar to those 

 of Actinoptilum mol/e, Kiikth. The spicules which have 

 not been described for Actinoptilum molle are minute, 

 ovoid calcareous bodies with a few central markings and 

 striae concentric with their ends. They are about 0*046 

 mm. in length or may be even shorter. The calyces of the 

 autozooids are about 2 mm. in height. 



These specimens show very marked affinities with 

 Actinoptilum molle, one marked difference being the occur- 

 rence of calcareous corpuscles in the anthocodiae. They 

 are excluded from the genus Echinoptilum by the short 

 calyx and completely radial arrangement of the auto- 

 zooids. They agree with Kukenthal's genus Actinoptilum 

 in the radial arrangement of the autozooids, in the dis- 

 position of the autozooids in longitudinal and transverse 

 stripes, in the small calyces of the autozooids, in the rudi- 

 mentary calyces of the siphonozooids and in the general 

 shape and arrangement of the spicules. They decidedly 

 differ from typical Actinoptila in the occurrence of spicules 

 in the anthocodiae. 



Specimen B. 



Actinoptilum molle, Kiikth. Six specimens from South 

 African waters of which the exact location is not known 

 as unfortunately the numbering on the label in the jar had 

 disappeared. I have no hesitation in determining these 

 specimens to be Actinoptilum molle, Kiikth. They agree 

 with the description and with a specimen from South 

 Africa which had been lent by Professor Hickson to the 

 Zoologist of Breslau. One point which these specimens 

 showed better than the other examples from Cape St. 

 Blaize was the division of the calvx into two large and 





