184 



distinct, resembling costse. At the same time, varices are present, 

 an'\ IT. asperulus may, conchologically, be regarded as intermediate 

 between Muricidea and UrosaljJtnx. 



Dime?isions. — Length 18 mm. ; breadth 8 mm. ; length of 

 aperture 5 mm. ; length of canal 5 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 9450. Three specimens. Purchased. 



G. 10068. The figured specimen. Presented hy John Dennaiit, Esq. 



Murex (Muricidea) camplytropis, Tate. 



1S88. Murex (Ocinebra) camplytropis, Tate, Trans. Eoy. Soc. South Aust. 



vol. X. p. 105, pi. iii. fig. 2. 

 1893. Murex campli/tropis, Tate and Dennant, id. vol. xvii. pt. 1, p. 218.' 

 1896. Murex emnpli/tropis, Pritchard, Proc. Eoy. Soc. Vict. vol. viii. n.s. 



p. 145. 



This species is larger than M. asperulm, from which it differs, 

 piincipally, in not being so elongate, in having a relatively shorter 

 canal, by the varices being less erect, and in some minor details 

 of ornament. The only specimens in the Museum collection are 

 badly preserved, and full particulars of dimensions cannot be 

 given. The dimensions as here stated, however, indicate a larger 

 shell than that mentioned by Professor Tate. 



Dimensions. — Length 29 mm. ; breadth 16 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 9447. Two examples, from the larger of which the columella 

 is missing. Purchased. 



Genus SISTRUM, Montfort. 



[Concli. Syst. t. ii. 1810, p. 595.] 



" Ricinule," Lamarck, Cours Zool. 1812, p. 119. 

 Picinula, Lamarck, Ency. Meth., Vers. Coq., Moll., etc. t. iii. 1816, 

 pi. 395, figs. \a-l. 



Shell ovate or subfusiform, solid; whorls tubercular, spinose, 

 or longitudinally costate, aperture narrow, contracted by callous 

 projections ; canal short ; outer margin strongly dentate witiiin ; 

 inner margin wrinkled or plicated. 



Type. — Sisiruiit lubum, Montfort [Buccinum echinatum, Lamarck). 



