Baker — Critical Notes on the Muricidae. 389 



Genus Sistrum Montfort, 1810. 



<; 8istrum Montfort, Conch. Syst., II, p. 594, 1810. 



= Ricinula, Lamarck, Extr. d'un Cours, 1812. 



The name Sistrum has two years' priority over Ricinula. 

 Pentadactylus Klein (Ostracoi., p. 17, 1753) has been used 

 for this group, but Klein's work antedates the tenth edition 

 of the Systema of Linnaeus and cannot therefore be used. 



Subgenus Morula Schumacher, 1817. 



<^ Morula, Schumacher, Nouv. Syst., p. 227, 1817. 

 This name should be used in the same sense that Sistrum 

 has heretofore been used for the smaller forms of the genus. 



Sistrum marginatum Blainv. 



Sistrum marginata Blainv., Nouv. Ann. du Mus., I, p. 218, pi. x, flg. y, 

 1832. 



In a letter to Mr. Geo. W. Tryon, Mr. Garrett said (some 

 ten years ago): ^'Sistrum affinis Pease is a synonym of 

 marginatum {=fu8conigra Dunker) ; the latter is not a syn- 

 onym of muricina as supposed by Schmeltz. Marginatum is 

 common at the Marquesas, but is not found in any other part 

 of Eastern Polynesia; but is found commonly in the Western 

 Group. 



'• Sistrum squamosum Pease (= marginatum) is not found 

 east of Samoa, but is common in the Western Group and 

 Australia." 



Subfamily COEALLIOPHILINAE. 



Genus Latiaxis Swainson. 



Some time ago (Bull. See. Zool. de France, 1883, p. 187), 

 M. Jousseaume proposed the name Latiaxiena for a number 

 of species belonging to various genera ; his diagnosis was as 

 follows: ** Shell largely umbilicated, fusiform and ventri- 

 cose, longitudinally costate and encircled with squamose lirae 

 or with denticulate striae, aperture oval, crenate on the outer 



