188 Gatlif and Gabriel: 



which species he referred, we only adopt his generic name as 

 applicable to similar forms. Coliimbella mercatoria being recog- 

 nised as the type of Lamarck's genus, there being no forms simi- 

 lar to these two in our waters, and as it has been decided to 

 split up the great assemblage of species hitherto classed as 

 Cohimbellidae, we have adopted the following generic names 

 for our species. 



Genus Mitrella, Risso 1826. 



MiTRELLA SACCHARATA, ReCVC. 



1859. Columbella saccharata, Rve. Conch. Icon., pi. 



29, f. 187. 

 1901. Columbella (Mitrella) saccharata, Rve. Tate and 

 May, P.L.S., N.S.W., v. XXVL, p. 366. 

 Hab. — Dredged Western Port; taken off cable to Tasmania, 

 Bass Strait. 



Obs. — Its nearest congener is C. semiconvexa, Lk., from which 

 it may be distinguished by its narrower form and smaller size; 

 the type is in the British Museum ; locality, " Van Diemen's 

 Land." 



Others listed as Columbella now included in Mitrella are C. 

 semiconvexa, Lk. ; C. austrina, Gask. ; C. menkeana, Rve. ; C. lin- 

 colnensis, Rve. ; C. angasi, Braz. ; C. tenisoni, Tryon ; C. tenuis, 

 Gask. ; C. tenebrica, Rve. ; C. nubeculata, Rve. ; C. beddomei, Pet- 

 terd ; C. legrandi, Ten.-Wds. ; C. lurida, Hed. ; and C. frank- 

 Mnensis, Gat. and Gab. 



Gerras Aesopus, Gould i860. 

 Aesopus CASSANDRA, Hedley. 



1909. Daphnella cassandra, Hed. Gat. and Gab., these 



Proc, V. XXIX., p. 37. 

 1918. Aesopus cassandra, Hed. Jour. R.S., N.S.W., v. 



LI. for 1917, p. 90, No. 948a. 



Aesopus pallidulus, Hedley. 



1907. Mitromorpha pallidula, Hed. Gat., these Proc, v. 



XX., p. 32. 

 1918. Aesopus pallidulus, Hed. Id. No. 948b. 

 We follow Mr. Hedley in his transference to this genus of the 

 two foregoing species. And also transfer to it Columbella 

 plurisulcata, Rve., previously listed by us. 



