88 SMITHSOXIAX MISCKLLAXEOUS COLLECTIOXS VOL. 52 



terias Perrier, but is new. Being nameless, it may be called Lysas- 

 terias, with Anastcrias pcrricri Studer as type. 



AsTEROPSis >\Killer and Troschel (Archiv fiir Xaturgeschichte, 

 6 Jahrg., Bd. I, Sept., 1840, 322), type, A. cariiiifcra (La- 

 marck). 



This name, which was published in 1840, and not in the System 

 der Asteriden, 1842, as invariably quoted, has exactly the same sig- 

 nification as Gray's Gymnastcria (Dec, 1840), but is in turn ante- 

 dated by Aster ope Aliiller and Troschel, as explained below under 

 Gymnastcria. The Archiv fiir Xaturgeschichte appeared in 3 parts 

 to each volume. The article "Ueber die Gattungen der Asterien 

 (Auszug aus dem ]\Ionatsber. der Konig. Akad. der Wiss. Monat, 

 April, 1840)" was very probably in the beginning of the third part, 

 which would make the date about September, 1840. The genus is 

 monotypic, and the name can not therefore be restricted to Astcr- 

 opsis veniiciiia (Lamarck), as has been done by Perrier (Rev. Ste'il., 

 1875, 282) and authors since. Aster opsis is a synonym of Aster ope, 

 along with Gyjiiiiasteria. Asteropsis z'erniciiia (Lamarck) Perrier 

 becomes Petricia vcrnicina. The genus Petricia Gray ( Proc. Zool. 

 Soc, pt. X\', 1847, 81) has for type P. punctata Gray, which ecjuals 

 Astcrias vcrnicina Lamarck. 



Crenaster Perrier (Ann. Sci. Xat. Zool., Art. 8. XIX, 18S5. 

 71), type. C. mollis Per. 



This name is invalidated by Crenaster d'Orbigny (Prodrome de 

 Paleontologie, t. i., 1850, 240), a synonym of Astropecten Gray. 

 Crenaster Perrier is very doubtfully distinct from Dytaster Sladen. 

 The only difference is the absence of pedicellarire in Crenaster. The 

 same character has been unsuccessfully used by Perrier in attempt- 

 ing to distinguish Pontaster from Cheirastcr. 



Ctenaster Perrier (Bull. ^lus. Comp. Zool., IX. 1881. 18). 

 type, Ctenaster spcctahilis Per. 



L. Agassiz. in ihe Memoirs Soc. Scientif. Xeuchatel. 1, 1835, 102. 

 used Ctenaster as a substitute name for ,lstcrina Xard(^, 1834. Its 

 status corresponds to that of Cribrclla. This jirior use of Ctenaster 

 ("Once a synonym, always a synonym'") leaves Perrier's genus 

 without a name. It may be called Lcctmasfer. the tyj^e and only 

 known species being Ctenaster spcctabilis Perrier. 



