Victorian Marine Mollusca. 147 



The genus Rissoa, Freminville, 1814, has also been greatly 

 split up ; we class ours already listed as follow : — 



Genus Haurakiajredale 1915. 

 This includes the following species: — 

 Haurakia descrepans, Tate and May. 



1900. Rissoa descrepans, Tate and May. T.R.S., S.A.^ 



V. XXIV., p. 99. 



1901. Rissoa descrepans, Tate and May. P.L.S., N.S.W.^ 



vol. XXVI., p. 391, pi. 26, f. 65. 

 1909. Rissoa incompleta, Hed. Gat. and Gab., these 

 Proc, V. XXII., p. 41. 



1918. Haurakia descrepans, Tate and May. Hed., Jour. 



R.S., N.S.W., V. LI., for 1917, p. 51, No. 498.. 

 ^R, liddeliana, Hed., is also included in the genus Haurakia. 



Genus Merelina, Iredale 191 5. 

 This includes the shells listed as Rissoa cheilostoma. Ten.- 

 Wds. (Iredale's genotype) ; R. strangei, Braz. ; R. hulliana, Tate; 

 R. gracilis, Ang. ; R. australiae, Frauenf . ; R. agnewi, Ten.- 

 Wds. ; and R. filocincta, Hed. and May. 



Genus Lironoba, Iredale 1915. 

 This includes shells listed as Rissoa tenisoni, Tate; R. imbrex^ 

 Hed. ; R. schoutanica. May ; R. iravadioides, Gat. and Gab. ; and 

 R. wilsonensis, Gat. and Gab. 



Genus Estea, Iredale 191 5. 

 This includes the shells listed as Rissoa subfusca, Hutt. (Ire- 

 dale's genotype) ; R. incidata, Frauenf.; R. janjucensis, Gat. and 

 Gab. ; R. frenchiensis. Gat. and Gab. ; R. woodsi, Prit. and Gat. ; 

 R. flammea, Frauenf. ; R. pyramidata, Hed. ; R. rubicunda, Tate 

 and May; R. dubatabilis, Tate; R. bicolor, Petterd; R. erratica,. 

 May; R. salebrosa, Frauenf.; R. columnaria, Hed. and May; 

 R. olivacea, Dunker ; R. aurantioeincta. May ; R. obeliscus, May p 

 also — 

 Estea tumida^ Tenison- Woods. 



1876. Diala tumida, Ten.-Wds., P.R.S., Tas., p. 147. 



1919. Estea tumida, Ten.-Wds. May, Id, p. 60, pi. 15^ 



f. 9. 

 Hab.— Western Port. 

 Obs. — Size of type: Length 2.50, breadth 1 mm. 



