JAPANESE ASTEROIDEA. 511 



marginale d'une pièce dorsale, ventrale, ou même ambulacraire, autrement 



que par la situation. 



"La bouche du Pentaceros turritus, qui est tout à fait semblable au 

 Pentaceros muricatus, nous ayant servi de type pom- notre description géné- 

 rale et notre schéma A (p. 70), on n'ama qu'à se reporter là pour en avoir 

 une description détaillée. La figure 11 (pi. xii) représente l'odontophore, 

 dont on remarquera la gi-ande simihtude avec celui du Pentaceros reticulatus. 



"Le système interbrachiaP^ rappelle tout à fait ce que nous avons vu 

 chez la Cidcite, et diffère complètement de la muraille d'ossicules de l'autre 

 type de Pentaceros. En se repoi-tant au schéma A, on verra la disposition 

 des muscles dorso-ventraux." 



Bell gives a full description of tliis species under the name of 0. 

 Unchi ['84, p. 72] : 



[References to De Blünvelle and Pereier ['76, p. 239].-^] 



"R=3 r. Disk moderately high; arm moderately wide, not at all 

 acutely pointed. Lophial spines well developed, the apical very prominent ; 

 a spine or two sometimes developed within the apical region. 



"About 18 marginal plates; the superomarginals alone form the sides 

 of the arms, and are alone provided with spines; these are confined to the 

 distal end, and vary considerably; from one to fom- may be developed, and 

 in some specimens they are twice as long as they are in others. 



" Adambulacral spinulation diplacanthid ; in tlie inner row eight poorly 

 developed spines, in the outer two, which are much stouter, for each plate ; 

 the tips of the latter are often marked by several shallow grooves; as so 

 frequently happens, a forcipiform pedicellaria is developed between each 

 inner group of adambulacral spines. 



"The separate venti-al ossicles are hardly, if at all, to be made out 

 under the exceedingly coarse granulation by wliich they are covered ; the 

 separate gi-anules vary considerably in size, and a few valvular pedicellariae 

 are scattered among them. The granules on the marginal plates are hardly 



1) Interbrachial sephim. 



2) " M. Pebrier here adopts the name of Lixck ; a course in which, I regret, I cannot 

 follow him." 



