52 s. GOTO 



PORCELLANASTERIDJE. 



Ctenoclicus crispât us (Retzius). 



(PI. yn, figs. 113-119; PL ^TŒ, figs. 120-126). 



This species appears to have been first figiu'ed by LiNCK iu 1733 under 

 the name of Ast rojxcten cornicidatvs, and was then described by Retzius in 

 1805 as Asterias crisjjcda. Peeeier also gives references to Sabine ['24] and 

 Dewüest, the former figining it under the name of Asterias polaris, the latter 

 refeniug to it as Asterias aurantiaca. Geay in his paper of 1840 [p. 180] 

 includes two sj)ecies in the fii'st section of liis genus Astropeden, viz. 

 Astropeden corniculatiis and Astr. ptolaris, both now considered as synonyms 

 of the present species. The passages relating to the species under review 

 are as follows : 



" 1. Body pentagonal ; rays short. 



" 1. Astrop)edcn corniculahis, Linck. t. 27. & t. 36. f. 63. 



" Inliab. — • Perhaps a variety of the next. 



"2. Astropeden polaris = Asterias p>olaris. Sabine, Paeey's Voy. 223. t. 1. 

 f. 2, 3. 



"Inhab. North Sea." 



The genus Ctenodiscus is due to Müller and Tegschel, who describe 

 two species in their " System " as follows [p. 76] : 



*' Species 1. Ctenodiscus polaris Nob. 



(References to Linck with? S.U3INE and Geay ['40]). 



" Der kleine Halbmesser verhält sich zum gi'osson wie 1 : 2. Körper 

 X)entagonal, die Ai-me dreieckig, weniger breit am Grunde als laug. Fur- 

 chenpapillen 3-4 nebeneinander auf jeder Platte, fast gleich, conisch, spitz ; 

 nach aussen davon trägt die Platte meist noch einen Stachel. Die Bauch- 

 sc^hieiien l)estelien aus zwei Keihen glatter Schuppen, an den längsten Reihen 

 sind 7 Schuppen vorhanden. Randplatten 12 an jedem Ai-me. Die imxjaa- 

 rigo Platte an der Spitze ist fast doppelt so lang wie breit, trägt 2 Stacheln 

 am Ende imd dahinter noch eine kleinere Ei'höhimg. Sie ist auch am 



