414 



THE VOYAGE OF H.M.S. CHALLENGER. 



PAGE AND PLATE 



XXXIL External surface surrounded by a veil of tangential rays 



belonging to pentact pleuralia. The autodermalia 

 are predominantly pentacts {RosseJla, Carter), 



External surface without a veil of tangential rays, 

 XXXIII. Rossella, Carter. 



The four tangential rays of the pentact pleuralia intersect 

 at right angles, ..... 



The four tangential rays of the pentact pleuralia do not 

 intersect at right angles but form acute angles with 

 one another, ..... 



XXXIII. 

 XXXIV. 



Rossella velata. 



143 



XXXIV. 



XXXV. 

 XXXVL 



The external surface of the body bears radially projecting 

 papillfe, from each of which a tuft of long pleuralia 

 projects. The root tuft is fixed in the mud 

 {Pohjlophus, F. E. S.), . 



The external surface of the body bears no papillae or 

 basal tuft, ...... 



Pohjlophus, F. E. S., with the single species, . 



Body-wall thin and loose. Oscular margin (always?) 

 with a cuff-like fringe of marginalia (Bathydorus, 

 F. E. S.), 



Body-wall somewhat thick and firm. Oscular border 

 smooth, without marginalia, 



XXXVII. Bcdhijdoms, F. E. S. 



The autodermalia consist solely of rough oxytetracts, 

 The autodermalia consist solely of diacts and monacts. 

 The j^arenchyma contains besides oxyhexasters also 

 discohexasters, ..... 



1 In many of the parenchymal oxyhexasters the jsrincipal 



rays are very much shortened, and the terminals thus 

 appear to spring directly from a central node, 



The terminal rays of the parenchymal oxyhexasters all 

 spring from developed principals, . 



2 The terminal rays of many parenchymal oxyhexasters are 



curved in an S-shaped fashion, 



The terminal rays of many parenchymal oxyhexasters 

 are somewhat undulating in their curvature, 



XXXVIII. From the external surface of the body pointed pleuralia 



project, either isolated or united in tufts. The 

 autodermalia are pentacts and tetraots {Acaidliascus, 



F. E. S.), 



The external surface of the body is smooth, without 

 pleuralia, ... ... 



Rossella antarctica, . 139 



LV. 



XXXV. 



XXXVI. 



Polylophtis pkilippinensis, 133 



LIII., LIV. 



XXXVII. 



XXXVIII. 



1 



Bathydorus hacuUfer, 



Batliydorus stellatus, 



154 



LIX. 



152 



LIX. 



Bathydonis fimbriatus, . 151 



LVIII. 



Bathydorus spinosus, , 153 



LIX. 



XXXIX. 



XL. 



