420 Frederick Chapman : 



of our Tertiary examples of Limojjsis, viz., L. aurita, Brocchi 

 sp. It will be seen, however, in the detailed description, that 

 the Patagonian and New Zealand species, L. insolita, Sow. sp., 

 is closer to the Australian form, and, indeed, specifically identical. 



In the present revision the relationshijis of the living 

 Victorian and kindred species of the genus have been discussed ; 

 and it may here be suggested that the trouble of making a 

 further and general comparison of the living with the fossil 

 fauna of the Australian marine areas would be amply repaid by 

 the acquisition of a correct knowledge of the percentage relations 

 one to the other. 



The specific names it is proposed to adopt in this paper are 

 the following : — 



Name. Salient Charactei's. 



L. morningtonensis, Pritchard - Valves depressed, subquadrate ; con- 

 centric ribs accentnated. Orna- 

 ment in later stage sectinate. 



L. maccoyi, sp. nov. ( = L. belcheri. Valves depressed, long-ovate, oblique; 

 McCoy, non Adams and Reeve) radial ribs accentuated. Ornament 



fimbriate. 



L. 'rnultiradiata, Tate - - Valves nearly as above, not so oblique 



radial ribs bifurcating. Ornament 

 margaritate. 



L. beaiimariensis, sp. nov. (= ?L. Valves subti-igonal, ventral border 

 forskali, Adams, /irfe Tate) - long, moderately deep to shallow 



Ornament nearly as in L. maccoyi, 

 but caneellate. 



L. insolita, Gr. Sowerby, sp. - Valves deep, subovate, oblique, occasi- 



onally subtrigonal ; with well- 

 marked concentric laminae, ei'ossed 

 by fine, pseudo-divergeiTt striae. 

 Ornament malleate. 



Description of Species. 



LiMOPSis MORNIXGTO^•EN^<Is, Pritchard. 



(Plate LXXXIIL, Fig. 1 ; PI. LXXXV., Fig. 7). 



L. morningtonensis, Pritchard, 1901, Proc. R. Soc. Vict. vol. 

 XIV., N.S., pt. I., p. 24, pL II., Figs. 6, 6a. 



Abridged Description (for full details see above). — Shell 

 roundly quadrate, depressed ; slightly oblique, with a small but 



