JAPANESE ASTEEOIDEA. 469 



Oll referring back to Gray's earlier paper the above species appears as 

 Pcntaceros Jiiuculns, and is described in very nearly the same words ['40, p. 

 276] ; it is identical with (). likdctis M.T. according to the joint opinions of 

 Geay \^(j<ü, p. 6], MÜLLER and Teoschel ['42, p. 48] and Perrier [76, p. 

 59]. Gray's Pcntaceros nodoses, No. 11, {=0. grayi Bell) has been more 

 fully redescribed by Lütken ['64, p. 152], Bell ['84, p. 83], de Lopjol ['85, 

 p. 60] and Sluiter ['89, p. 304], and it is evident from these descriptions 

 and the figures given by de Loriol that it is not identical with the Pcn- 

 taceros franldinii of Gray, a synonym of the present species ; the principal 

 différencies between the two being the absence of all tubercles from the mar- 

 ginal x^lates in P. franldinii and their presence in P. nodosvs Gray's No. 

 11,^^ the presence here and there of particularly large pedicellarije on the 

 dorsal side of P. nodosiis Gray's No. 11 but of particularly small ones in P. 

 franldinii, and the presence of only two spines in the outer row of adambu- 

 lacral spines in P. nodosus Gray's No. 11 but of three or four in P. fmnl- 

 liniiP The latter species has been figured by Gray in his paper of 1866, 



1) " .... Kandplfiderne 17. Af de övre hajver over H.ilvdelen (7-10) sig oi) in en bred, Kegle- 

 dannet, koruet, i Toppen nögen Knude ; p.ia de nedre findes der Spor til Smaaknuder, dog kim 

 i Armens inderste og yderste Deel" [Lütken, '64, p. 152]. The marginal plates 17. Of the 

 upper over half (7-10) raise themselves in a broad, conical, grantdated node, naJced at the top ' 

 on the lower there are traces of small nodes, but only in the innermost and outermost part of 

 the arm. De Lokiol gives a similar description ['85, jj. 61] : " Les plaques marginales dorsales 

 sont très ttistinctes, grandes, mais très inégales dans leur développement ; les unes, beaucoup 

 plus grandes, se relèvent en tubercules, en forme de mamelon très dévelopi^é, couvert, comme les 

 autres, de granules polygonaux, serrés, avec une pointe lisse, plus ou moins allongée ; les autres, 

 en nombre variable sur chaque bras, ou bien se relèvent moins en formant un mamelon tout en 

 ayant la pointe lisse, ou bien ne se relèvent ims du tout et n'ont point de pointe. Toutes les 

 pLaques sont xétrécies et cunéiformes sur leur côté interne, de manière à laisser de la lîlace à de 

 larges aires porifères triangulaires. Le nombre des plaqxies varie entre quatorze et dix-sejît, de 

 chaque côté des bras, soit de vingt-huit à trente-quatre i^our chaque arc interbrachial, de l'extré- 

 mité de l'un des bras à celle du voisin: " 



2) " Klappetœnger ere meget sjeldne paa Bugtavlerne (hyppigst i Naîhrheden af Fodgangene) , 

 mangle ganske paa Kandpladerne, men findes hist og her paa Eyggen, hvor Hudskeletts Masker 

 stöde sammen, og have der en betydelig Störreise. Der er 7 Fodpapiller i den indre, to i den 

 ydre Eiolcke ; de mellem dem siddende Trenger ere meget smaae." [0. iwdosus, Lütkex, '64, p- 

 153]. 



PediceUaritc are very seldom on the ventral plates (most nmnerotis in the neighbourhood 

 of the ambulacral furrows), wholly wanting on the marginal plates, but present here and 

 there on the back, where the meshes of the cutineous skeleton meet together, and 

 Lave there a considerable size. There are 7 foot-papülai in the inner, two in the outer row ; 

 the pedicellariai which occur between them are very small. [0. nodos^cs, Lütki^n, '64, p. 153], 



