CIRSOTEEMA. 267 



Seguenzia radialis, Tate. 



1890. Sez/iieiizia radin/is, Tate, Traus. Koy. Soc. Soutli Aust. vol. xiii. 



pt. 2, p. 192. 

 1894. Seguenzia radialis, Tate, Joiirn. Roy. Soc. N.S.W. vol. xxvii. p. 185. 



Shell broadly conical; "flat and sharply angulated at the base; 

 perspectively umbilicated ; ornamented by radial sigmoidal threads, 

 latticed by spiral ones. . . . The umbilicus is wide . . . , 

 margined by about sixteen stout granulations, from which proceed 

 the radial threads in twos and threes. Aperture rhomboid, 

 peristome completed by a thin nacreous growth. Outer lip 

 roundly insinuated near the suture . . . . ; sharply and 

 shortly notched at the posterior carina ; at the exterior of the 

 base roundly insinuated, separated by a similar sinus at the inner 

 angle by a tubercle corresponding with umbilical carina." — Tate. 

 The columella has a strong, twisted denticle at about two-thirds 

 of its length. 



The shell is very rare. 



Dimensiom. — Length 3 mm.; breadth 3 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 9483. An example of the adult. Purchased. 



Family SCALID^. 



Genus CIRSOTEEMA, Morch. 



[Cat. Yoldi, 1852, p. 48.] 

 Caloscala, Tate, Southern Science Record, vol. i. n.s. 1885, p. 3. 



Shell imperforate ; lamellae frequently crisped ; spiral threads 

 occasionally very large ; anterior portion of the body-whorl some- 

 what flattened and bounded by a concentric thread, which limits 

 an expansion generally covering over the flattened edges of the 

 lamellae, or the area limited by that spiral thread may only be 

 comparatively smooth ; the thread terminates in a dentiform 

 projection on the outer margin. 



The genus is here interpreted in the broad sense, none of the 

 species to be alluded to being sufiiciently well preserved to admit 

 of their being satisfactorily assigned to subgenera. 



Type. — Scalaria varicosa, Lamarck. 



