JAPANESE ASTEROroEA. 



2G1 



kort, tiltrjkt Rauclpig^^ (kun et en- 

 kelt Sted to) er indleddet. Bug- 

 sidens öviige Bekleedning bestaaer 

 af : 1) Adambiüacralpladerne, livis 

 Antal er omtrent dobbelt saa stort 

 som Randpladerues, og som liver 

 ere udstyrede med en I{j.-ands af 12- 

 15 Papiller, af livilke de 4-5 

 lœngste vende ind mod Fodgangen 

 og de korteste deels mod Munden, 

 deels mod Armens Spids ; 2) af de 

 Smaatavler, som danne det her for- 

 holdsvis vel udviklede Bugfelt,'^ der 

 dog ikke straskker sig nd paa selve 

 Ai'mene, men kim til den lOde 

 Adambiüacralplade omtrent. Der er 

 i hvert Bugfelt 5-6 större Smaatavler 

 paa liver Side, dannende een med 

 Adambiilacralpladerne parallel Rœkke, 

 samt en lille Gruppe, sammensat af 

 en lialv Snees meget smaae Tavler, 

 mellem hine og Armvinklernes Rand- 

 plader;^^ AHe Bngfeltets Smaatavler 

 ere kornede -p'âo, deres Overflade og 

 fryndsede i Banden ligesom Kand- 

 pladerne og Paxillerne." 



1) " Det er maaskee denne Pigs Liglied 

 med Stellasternes ' hnengende Eandi^ig ', som 

 liar forledt M. til at gjjore denne S^stjerne til 

 en Stellaster." 



2) " Som bekjendt er dette overmaade 

 lidet, ruesten forsvindende hos de fleste Kam- 

 stjerner. Meest udviklet er det — iDaa Gnind 

 af de afrundede Armvinkler — hos ArcTiastßr 

 Parelli og Astropecten Andromeda." 



3) " Denne Bngfeltets Sammensœtning er 

 ikke heldig gjengivet pjia Afbildningen." 



upper marginals are destitute of all 

 traces of spines; on each of the lower 

 there is however in the iieighbom- 

 hood of its upper margin a small 

 node, on Avliich a broad, flat and 

 blunt, but rather short, adpressed 

 marginal spine ^^ (only in a single 

 place two) is placed. The remain- 

 ing covering of the ventral side con- 

 sists of : 1) the adambulacral plates, 

 whose number is nearly twice that 

 of the marginal plates, and which 

 are each covered with a crown of 

 12-15 papillœ, of which the 4-5 

 longest are directed inwards towards 

 the ambulacral f m-row and the shortest 

 partly towards the mouth, partly 

 towards the apex of the arm ; 2) of 

 the tablets wliich form the ventral 

 area,-^ relatively well developed in 

 this species, Avliich however does not 

 extend into the arms, but only to 

 about the 10th adambulacral plate. 

 In each ventral area there are 5-6 

 larger tablets on each side, forming 

 a series parallel with the adam- 

 bulacral plates, together with a small 

 group, composed of some half score 

 very small plates between the 

 adambulacral plates and the mar- 

 ginal j)lates of the arm angle.^^ All 

 the tablets of the ventral area are 

 granulated on their upper sm'face 

 and fringed at the margin like the 

 marginal plates and the paxillaî. 



1) It is perhaps the similarity of this 

 spine with the ' hanging marginal spine ' of the 

 Stellaster-species, which has misled M. to re- 

 fer this starfish to Stellaster. 



2) As is known this is exceedingly- 

 small, well-nigh nil in most Astropectens. It 

 is most developed — on account of the rounded 

 arm angles — in Archaster Parelii and Astrojjec- 

 ten Andromeda. 



3) This composition of the ventral area is 

 not reproduced to advantage in the ligure. 



