212 



nished in the anterior-half witli a])out eiglit obtuse tubercles, 

 sometimes shortly prolonged on to the base, and towards the pos- 

 terior end with four or five elongated teeth, the rest of the inner 

 lip obsoletely denticulate. The columella is rounded, not inter- 

 nally extending in the form of an erect plate. 



Dimensions. — Length, 57 ; width, 36 ; height, 28. 



Loccdity.--'We\\-^mk\\\g in the Murray Desert. 



This species is not much unlike C. Mcqrpa, but it has a different 

 dorsal and transverse outline. 



21. Cyprsea gigas, McCoy. 



References. — Ann. Mag. Nat. Hist., p. 438 (1867); C, (Aricia) 

 gigas^ Pal. Yict., Decade II., tab. 15, tab. 16, fig. 2, tabs. 17 and 

 18, fig. 1 (1875); Dec. III., tabs. 28 and 29, fig. 1 (1876). 



Shell very large, oval, back very gibbous, roundly sloping at 

 both ends ; anterior canal deep, narrow, elongate, projecting up- 

 wards ; posterior canal obliquely truncate, reflexed upwards, and 

 adherent to the spire. Base flattened, oval, much thickened ; 

 inner lip rounded, smooth within, flattened near the anterior 

 canal ; outer lip inflected, tumid, broad, with nine or ten obsolete 

 obtuse teeth near the anterior end and a few near the posterior 

 end. 



Dimensions. — Length, 8 inches ; proportional widtli, ^^y ; 

 height, -^V- 



Localities. — Muddy Creek, Schnapper Point, and near the 

 mouth of the Gelibrand River (McCoy). Casts probably of this 

 species. River Murray Clifl's. 



This is the largest known Cowry, living or fossil. 



22. Cyprsea dorsata, spec. nov. 



Shell very large, sphteroidal ; abruptly rounded at both ends, 

 inflatedly rounded at the sides ; spire concealed. Anterior canal 

 deep, narrow, short, upturned, obliquely truncate ; posterior canal 

 rather broad, deep, short, confluent with the spire. Base as in 

 C. gig(is. 



Dimensions. — Length, 95 ; width, 75 ; height, 65. 



Localities. — Eocene. Muddy Creek (J. Dennant) : Schnapper 

 Point (R. T.). 



This rival, in point of size, to C. gigas (as it attains to con- 

 siderably larger dimensions than those of the type-specimen) is 

 separable from it by its spha^roidal form and very short anterior 

 canal ; it stands to that species in much the same way that 

 C. decipiens does to C. Ther sites. 



23. Cyprsea gastroplax, McCoy. 



Reference. — C. (Aricia) gastroplax, Pal. Vict., Decade IL, tab. 

 16, tig. 1 ; tabs. 17 and 18, tig. 2 ; 1875. 



