318 Chapman and Gabriel : 



of Port Darwin and Tori'es Stiait. Tlic living species has a thinner 

 lip and stronger spiral surface-markings. 



Distribution.— Bore .'J. 201-220 feet (var.). Bore 10, 225-230 

 feet (Holotype.) 



Genus CYCLOSTREMA, Marryatt. 



Cyclostkema homalon, Verco. 



Cyclostrema homalon, Verco. 1907. Trans. R. Soc. S. Austr. 

 vol. xxxi. p. 305, pi. xxix. figs 3, 4. Gatliff and Gab- 

 riel, 1913, Proc. Roy. Soc. Vict., vol. xxvi. (N.S.), 

 pt. I., p. 75. 



Observofio/is. — This is a living species on the South Australian 

 and Victorian coasts. It is distinguished from Petterd's earlier 

 ■described Cyclostrema harrieffae, which also occurs in the borings, 

 by its wider umbilicus and coarser spiral markings. 



Some examples of Cyclostrema in the Dennant collection (Nat. 

 Museum) from Guerard's Hill (Janjukian), and from the Gippsland 

 Lakes (Kalimnan). if not identical Avith the above species, are closely 

 allied to it. 



The present occurrence is from a Kalimnan horizon. 



Distribuf ion. —Bore 10. 195-225 feet. 



Cyclostrema harkiettak, Petteid. 



Cyclostrema Jiarriettae, Petterd, 1884, Journ. Conch., p. 

 141, No. 24. Tate and May, 1901. Proc. Linn. Soc. 

 N.S. Wales, vol. xxvi. pt. 3. p. 396. pi. xxv. figs. 

 46-48. 



0/tservations. — This species, like the precctling, is here i-ecorded 

 as a fossil for the first time, and it is interesting to note its occur- 

 rence as far down as the Kalimnan. Its undoubted relation to 

 the form separated by Dr. Verco as C. homalon is also demon- 

 strated in the fossil specimens, and the two forms occur on the 

 same stratigraphical platform. 



C. harriettae is a living species on the Victorian and Tasnianian 

 coasts. 



DisfributioN.—Bovt' 6. 114-150 feet. 



