WITHIN THE GENUS DBNDRONEPHTHYA, 51 



2. Branching. Markedly divaricate but not markedly flat- 

 tened. The contour of the colony is irregular. These features 

 point to the suensoni section, and in that section the only species 

 to wliich the specimens could be referred is D. ehrenhevgi. The 

 mode of branching is the same, and the resemblance of these 

 specimens to Kiikenthal's coloured figures is striking except that 

 they have much less of a sterile stalk, 



3. Coloicring. Rich red in the ccenenchyma and with greyish- 

 yellow anthocodial spicules. 



4. Pol^/p stalks short. Text-fig. 11. 



5. Polyps arranged in little divaricate ..... 

 groups of about 5-8. 



6. Polyp spicules. There ai'e in most 

 6 pairs of white spicules arranged en 

 chevron in each of the anthocodial lines : 

 in Kiikenthal's forms there were 4-5. 

 There is no very distinct crown. The 

 supporting bundle consists of thick, 

 rough red spindles (up to 1*5 mm.), 

 projecting freely for about 0"5 mm. 



7. Other spicules. The canal-walls 

 show a few bent, rough spindles. The 

 spicules of the stalk cortex are mostly 

 very distinctive, long (up to 3"5 mm.), 

 curved, red spindles, also ovals and b. ehrenlergi Kiib. 

 irregular clubs covered with massive 



tubercles mainly with very characteristic rough blunt lieads. 

 There are also very rough discs, approaching spheres, covered 

 with the same massive tubercles. A few triradiate forms occur 

 in the lower cortex. Not very numerous, there are also minute, 

 colourless, irregular capstans. 



Deduction : — The specimens agree with D. ehrenhergi in 

 having : — 



(1) 6 pairs of spicules, in most cases, in the anthocodise ; 



(2) supporting bundle of rough spindles slightly projecting ; 



(3) polyps in little divaricate groups of about 5 -8 ; 



(4) spiculation of the canal walls ; 



(5) mode of branching. 



Localities: — Stations 164, 258. 



5. Dendronephtliya suensoni (Holm). 



Described by Holm, Zool. Jahrb. viii. Syst. pp. 35-37 (1895). 



Diagnosis : — Divaricate ; outline irregular ; not obviously 

 flattened; polyps in little groups (4-10), distinctly scattei'ed ; 

 polyp stalks medium; supporting bundle medium; point spicules 

 one pair only, of which one member is a long projecting curved 

 spindle associated with a much smaller one at its base ; crown of 

 some 6 rows of horizontally disposed spindles ; grade VI. ; 



4* 



