226 



The spiral ornament consists of crowded regular linear punct- 

 ated grooves. 



Aperture oval, oblique, almost lunate ; peristome entire, with 

 a groove around its inner margin, outside of wliicli is tlie punct- 

 ated face of the very tliick varix. Base convex or slightly de- 

 pressed, without a distinct basal keel. 



Dimensions. — Length, 8 ; width, 2*25 ; length of aperture, 2. 



Locality. — Eocene. Muddy Creek (not rare). 



6. Sealaria (Crisposeala) eehinophora, s/?ec. nov. 



Shell broadly turrited, thin, acute, imperforate, with eleven 

 normal whorls and three smooth shinijig tumid nuclear whorls. 



Spire-whorls very convex, but by reason of the posterior trun- 

 cation of the costse the profile is gradated. 



The transverse ornament consists of numerous (about 20 on the 

 anterior whorls) oblique, elevated, frilled, lamelliform costse, 

 usually composed of tw^o or three connate lamellae ; the costae are 

 roundly shouldered at the posterior two-thirds, and are extended 

 there into an erect short-lanceolate plate ; there are no proper 

 varices. 



The spiral ornament consists of broad, subacute, prominent 

 lirse ; the angular and narrow interstitial furrows are sculptured 

 by a few distant linear spiral grooves. 



Aperture circular ; peristome complete ; columella margined 

 externally by a narrow funicular rib which runs-out to the tip of 

 the slightly flattened and expanded columella ; the base is 

 rounded. 



Dimensions. — Length, 20 (estimated) ; width, including costa;, 

 •6 ; width of aperture, 3. 



Localities. — Eocene. River Murray ClitFs ! ; Corio Bay, near 

 Geelong ! 



^S'. ecliinoijhora has some analogy with Crisposeala junctilamella 

 of the Paris-basin, but it is more elongated, and is further dis- 

 tinguished by its frilled lamellae and spiral line. It might be 

 mistaken for ^S'. foliosa, S. Mar ice, or *S'. fleioi^liijlla ; but the ab- 

 sence of a basal keel at once separates it. 



6. Sealaria (Cireuloseala) foliosa, xp^^'c. nov. 



Shell rather large, somewhat thin, imperforate. Similar to 

 >S'. ecJiinopltora, but the lamelh^ are more numerous (25 and two 

 thick varices on the body-whorl), less apiculate at the rounder 

 shoulder. 



Aperture nearly circular, a little higher than wide ; peristome 

 complete ; outer lip broadly and varicosely expanded, crenated 

 on the sharp margin. Columella margined by a funicular rib, in 

 close contiguity to which is a revolving rib wdiich tei-minates at 

 the inner angle of the aperture. 



