24 THOMSON, The Pennatulaceae of the Cape of Good Hope. 



kurzer." In his plate of Umbellula rigida, the tentacle is 

 figured as shorter than the length of the body of the 

 autozooid, and in his figure of U. Kollikeri, it is not always 

 obvious that the tentacle should be if their text is correct 

 distinctly shorter than the body of the autozooid. My 

 specimen also exhibits some affinities with U. thomsoni, 

 more especially regarding the needles in the tentacles. 



After some hesitation, I have come to regard this as 

 a new species, closely related to U. rigida, U. Kollikeri, 

 U. thomsoni and U. carpenteri. U. rigida, Kiikth. occurs in 

 the Indian Ocean at a depth of 2,919 metres, U. Kollikeri, 

 Kiikth. occurs off the E. African coast at 1,668 metres, and 

 U. carpenteri in the Antarctic. 



I have pleasure in expressing my indebtedness to Dr. 

 J. D. F. Gilchrist for entrusting these Pennatulaceae to me 

 for description, and to Professor S. J. Hickson, F.R.S., 

 for valuable suggestions, for facilities in comparing speci- 

 mens and great help with the literature. 



