416 



THE VOYAGE OF H.M.S. CHALLENGER. 



XLVII. Gi-aieroiiwrpha — continued. 



1 The form of the body is tulip-like. The oscular fringe 



forms a thin annular plate almost 1 cm. in height. 

 The terminal rays of the parenchymal oxyhexasters 

 are straight, ..... 



The form of the body is oval. The oscular marginal 

 fringe is inconspicuous, about 2 mm. The terminal 

 rays of the parenchymal oxyhexasters are distinctly 

 S-shaped, ...... 



2 The oscular marginal fringe is sharply angular, and forms 



the broadest portion of the body. The terminal 

 rays of the parenchymal oxyhexasters are bent 

 round at their extremities, 



The oscular fringe is less extended than the median 

 portion of the puffed out body. The terminal rays 

 of the parenchymal oxyhexasters are straight, 



XLVin. Aulochone, F. E. S. 



The parenchyma contains, besides other spicules, ttori- 

 comes, ...... 



The tloricomes are altogether absent, 



XLIX. DicTYONiNA, Zittel. 



With distinctly developed uncinates (Unoinataria, 



F. E. S.), 



Without distinct uncinates (Inermia), . 

 L. Uncinataria. 



The dermal and gastral skeletons contain clavulie 

 (Clavularia), ..... 



Without clavulse, but with scopulae (Scopularia), 

 LI. Clavularia, with the single family Farreidse, and the single 

 genus Farrea, Bwk. 

 Branched tubular stock with a straight principal stem, 

 the dermal clavulse have mostly smooth edges, 



Branched anastomosing tubular stocks, without a straight 

 principal stem, ..... 



1 The parenchyma contains no discohexasters, 



Discohexasters occur in the parenchyma, 



2 The hexasters occurring in the parenchyma are ex- 



clusively discohexasters, with long terminal rays, . 



Of the parenchymal hexasters, some are oxyhexasters, 

 with short terminal rays, and others discohexasters, 

 with Ions terminals, .... 



PAGE AND PLATE 



Craieromarpfia meyeri, . 161 



LXI. 



Crateromorplia thierfelderi, 164 



LXII. 



Crateromorpha murrayi, 164 



LXIIL 



Crateromorpha fumida, . 166 



LXVn., LXVIII. 



Farrea davigera, 



1 



287 



LXXV. 



Farrea occa, . .277 



LXXI.-LXXIIL, LXXVL 



