230 



filiform varices on the spire, they are longitudinally striated and 

 crossed by the lint^. 



The base is defined by a rounded peripheral keel ; ornamented 

 by irregular-disposed, flat, concentric threads, which are more or 

 less wrinkled, and radially striated and obsoletely costated. 



Aperture roundly oblong ; peristome complete ; columella 

 slightly reflected and projecting, margined externally by a 

 funicular rib ; outer lip margined by a very stout varix, Urate and 

 longitudinally striated. 



Dimensions. — Length, 21 ; width, 6 ; height of aperture, 4 ; 

 width of aperture, 3. 



Locality. — Blue clays at Schnapper Point. 



Sealapia (Cirostrema) Marise, Tafa. 



References. — Caloscala J/arirf', Tate, Southern Science Record, 

 January, 1885, p. 3 ; Cirsotrema Mari(f, De Boury, Etude sur les 

 Sous Genres de Scalida?, p. 40, 1887. 



Shell turrited, about three times as long as wide, imperforate; 

 whorls numerous, convex, suture deep ; transversely laminate- 

 costated, variced, and spirally lirate. Costee lamellar, thin, equi- 

 distant, increasing from about 12 to 20 in a whorl with the revol- 

 ution of the spire. 



Varices conspicuous, more elevated than the costa?, subacute on 

 the edge, about one in a whorl, usually two, sometimes three on 

 the body-whorl, Lira3 subacute, prominent, equidistant, about 

 10 ; the flattish interstitial furrows (a little wider than the line) 

 and the lirse are sculptured with a few distant linear spiral 

 grooves alternating ^\'ith wider depressed threads. 



Body-whorl regularly convex to the peripheral rib : base con- 

 cave, traversed by the cost^e and spirally striated. 



Aperture circular ; peristome entire, varicosely thickened and 

 reflected, with a groove around its inner margin; columella flatly 

 expanded and slightly projecting at the front, where it is sup- 

 ported by an umbilical funiculus which is limited behind by the 

 penultimate varix. 



The posterior whorls are occasionally slightly angular, and their 

 ribs and varices are usually subspinosely f)roduced behind near 

 the suture. 



Dimensions. — Length, about 35 ; breadth, 10*5 ; height of last 

 whorl, 15 ; diameter of peristome 8, of aperture 5. 



Locality. — Eocene ; glauconitic limestones of Aldinga Bay. 



This species is the type of my subgenus Caloscala, which 

 through inadequate appreciation of the characters of Cirsotrema. 

 I had thought to be different from it ; M. de Boury says it is incon- 

 testably a Cirsotrema, and that it has much affinity with Scalar ia 

 acuta, Sowerby, of the Hampshire and Parisian Eocene. S. acuta 



