64 DR. W. RAE SHERRTFFS ON EVOLUTION 



uiBbellate groups. The upper part of the stalk, however, as 

 Kiikenthal describes, shows an incrustation of minute polyps. 



6. Polyi) spicules. The anthocodial 



armature conforms with Kiikenthal's Text-fig. 21. 



figure, but I should describe it some- /"-^ 



what difierently, for it seems to me to 

 have in each true point only one pair, 

 one member of which is distinctly larger 

 than the other, all the other (4-6) spi- 

 cules being referable to the crown. 

 Kukenthardescribes two closely opposed 

 spicules forming the upper part of the 

 point, below 1-2 pairs of horizontals and 

 below that again 3-4 converging pairs. 

 On my view, however, each point con- 

 sists of a pair of spicules. 



The supporting bundle is very short, b. longicaulis Kiik. 



scarcely projecting. 



7. Other spicules. The coi^tex of the branches is closely covered 

 with strong spindles of typical shape and blunt tubercles — 

 a feature in which this specimen does not conform to Kiikenthal's 

 description of D. longicaulis, where " the branch-cortex contains 

 separate longitudinally disposed very narrow spindles with sharp 

 thorns up to 2 mm. in length." 



On the other hand, the cortex of the stalk shows a close array 

 of stars as Kiikenthal describes, and with the same average 

 diameter of O'l mm. Among the stars are a few broad, short, 

 densely tuberculatex spin dies. 



Locality : — Station 310. 



15, Deiidronephthya disciformis (Kiik.). 



Described by Kiikenthal in ' Versuch einer Revision der 

 Alcyonarien,' ii. pp. 636-638 (1905). 



Diagnosis : — Umbellate; compact; disc-like ; outline uniform ; 

 polyps in bundles of 6-10 ; polyp stalks medium : supporting 

 bundle very strong ; point spicules about 5 pairs, with the upper- 

 most larger spicule predominating and projecting ; no croAvn ; 

 grade lY. ; spicules : in the upper cortex long, curved spindles 

 (2 mm.), in the lower cortex stout spindles, irregular stellate 

 bodies for interlocking, and large triradiates and quadriradiates ; 

 colour : generally pink and orange, supporting bundles red . 



Anthocodial Grade and Formula : — 



lY. = I + 4 p + Or -I- very strong S.B. 



Descriptive Notes : — 



1. Colony as a tohole. Six specimens. Each a compact colony 

 of a generally uniform outline, with its umbels arranged in larger 

 hemispherical masses which are superficially in contact, forming 



