JAPANESE ASTEEOIDEA. 



499 



i alt.^^ Midt nd ad liver Axm er der 

 5 (imdtagelsesvis 6) liöie, kegledau- 

 nede, lodrette Pigge ; desuden er der, 

 paa hver Side af den iuderste af 

 disse, en lavere, skraat udad til Siden 

 rettet Pig, som hviler paa en af de 

 Tavler, der adskille Armens öxre og 

 nedre Porefelter. Derimod er Rand- 

 piggenes Autal ikke foröget med AJ- 

 deren, det er ogsaa lier kun 1 eller 

 2 paa hver Side, Iienimod Spidsen. 

 Bngtavlernes Ivlappetfenger ere talri- 

 gere end paa yngi'e Exemplarer ; der 

 er i Regeln 1, ofte 2 eller 3 paa 

 hver Tavle, og navnhg längs med 

 Fodgangene synes deres Forekomst 

 at vœre constant. Fodpapillernes 

 Antal er f i den indre Deel af Fod- 

 gangen, de indre Mundpapiller c. 12, 

 hvoraf dog kun de 4 inderste sees, 

 da de andi*e ere betydelig finere og 

 lavere ; disse fire suppleres imidlertid 

 af den ydre Rsekke (svarende til de 

 ydre Fodpapiller), saa at der om- 

 kring hvert Mundlijörne er en Esekke 

 af 16 tykke, butte, rynkede Papiller af 

 lignende Form som nsermeste ydre 

 Fodpapiller. Kornbeklœdningen led- 

 sager her de store llygpigge Hge til 

 deres Top, men Graendsen mellem de 

 enkelte Korn eller Smaatavler er ofte 

 saa utydelig, at de synes at danne 

 et sammenhsengende Lag." 



1) " Lige i Stjemens Midte udvikles underti- 

 <len en lille Pig saaledes som paa det af Seba 

 iifbildede Exemplar." 



number of marginal plates is ||. At 

 the base of each of the five large 

 tower-like spines there are 3 in one 

 transverse row, directed obliquely out- 

 wards, therefore 20 in all.^^ Along 

 the middle of each arm there are 5 

 (exceptionally 6) high, conical, ver- 

 tical spines ; there is beside, on each 

 side of the innermost of these, a lower 

 spine directed obliquely outwards to- 

 wards the side, resting on one of the 

 plates that separate the ux^per and 

 lower pore-areas of the arm. On the 

 contrary the number of marginal spines 

 does not increase with age, there is in 

 this case also only 1 or 2 on each side 

 near the apex. Pedicellariœ of the 

 ventral plates are more numerous than 

 in yoimger examples ; there is as a 

 rule 1, often 2 or 3 on each plate, 

 and especially along the ambulacral 

 fm'row their occun-ence appears to be 

 constant. Number of foot papillpe is 

 f in the inner part of the furrow, the 

 inner oral papillfe c. 12, of which, how- 

 ever only the fom- innermost can be 

 seen, as the others are much finer and 

 lower ; these fom- are however rein- 

 forced by the outer row (corresponding 

 to the outer foot papillae), so that 

 aroimd each mouth angle there is a 

 row of 16 thick, blunt, fluted papillae 

 similar in form to the nearest outer 

 foot papillae. The granular covering 

 accompanies in this case the large 

 dorsal spines nearly to their top, but 

 the boundary between the several 

 grains or tablets is often so indistinct 

 that they appear to form a con- 

 tinuous sheet. 



1) Sometimes there is developed exactly in 

 the centre of the star a small spine similarly 

 as in the example figured by Seba. 



