138 FASCIOLAETA. 



a niiniiiture S. incertus, Dcshayes, of the Paris Basin, except for 

 minor details of ornament on the whorls. The figure accompanying 

 Professor Tate's memoir hardly does justice to the shell. 



Dimensmis. — Length 12 mm.; breadth 3-75 mm. ; length of 

 aperture 3 mm. 



Form, and Loc. — Eocene : River Murray cliffs, near Morgan, 

 South Australia. 



G. 9439. Two specimens. Purchased. 



Genus FASCIOLAIIIA, Lamarck. 

 [Mem. Soc. Hist. Nat. Paris, 1799, p. 73.] 



The animal of Fasciolaria closely resembles that of Fusus, and 

 the two genera are unquestiouably of the same origin. It 

 is difficult to satisfactorily separate the shells in the recent state, 

 and increasingly difficult as we pass from recent through older 

 deposits into the Eocene. In general, Fasciolaria may be dis- 

 tinguished in having a shorter spire, more inflated body-whorl, 

 a wider and more sinuous or flexuous canal ; but the oblique 

 plications on the anterior portion of the columella are the principal 

 differentiating characters. 



Type. — Murex tulipa, Linnaeus. 



Fasciolaria cristata, Tate. 



1888. Fasciolaria cristata, Tate, Trans. Eoy. Soc. South Aust. vol. 



p. 151, pi. viii. fig. 4. 

 1893. Fasciolaria cristata, Tate and Dennant, id. vol. xvii. pt. 1, p. 219. 



Shell fusiform, broad ; protoconch composed of two smooth, 

 bulbous turns, the anterior part being longitudinally corrugated, 

 though the rough costae are not immediately connected with the 

 ornamentation of the whorls proper ; spire elevated and tapering ; 

 whorls medially serrate, the serrations being flattened, their 

 posterior surface leading by a sloping, undulating platform, up 

 to the suture ; this broad platform is spirally lineate, the lines 

 being of unequal size ; in front of the median serrate carina are 

 three minor ones of similar character, between which are numerous 

 undulating spiral lines j the anterior portion of the body-whorl is 



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