01 



The Gastropods of the Older Tertiary or 

 Australia. (Paet I.) 



By Professor Ealph Tate, P.G.S., P.L.S., &c. 



[Read October 4, 1887.] 



Plates I.-XIII. 



[Note. — All measurements are in French millimetres. The direction of 

 the ornament or sculpture is termed spiral, or encircling when it follows the 

 spiral curvature of the shell ; when coinciding with the lines of growth 

 transverse as regards the whorls, or axial with respect to the length of the- 



shell.J 



FAMILY MURICID^. 

 G-ENFs Typhis. 



SYNOPSIS OF SPECIES. 



Varices spinous. 



Upper whorls angular ; varix simple. 



1. T. McCoyii. 

 Upper wliorls squarely rounded ; varix double. 



2. T. aoantlio])terns\. 

 Yarices foliar, adpressed, laciniated. 



Shell four times as long as wide ; whorls almost dis- 

 joined, posteriorly sloping inwards. 



3. T. disjunctus^ 

 Shell stouter ; whorls quadrate, posteriorly flat. 



4. T. laciniatus. 

 Yarices angular ; whorls subangulated. 5. T. fripterus. 

 Yarices absent ; tubular projections compressed, adpressed 



to the spire. 6. T. evaricosus. 



1. Typhis McCoyii, T. Woods. 



Typliis McCoyii, T. Woods, Proe. lioy. Soc, Tasmania, for- 

 1875, p. 22, t. i., fig. 5. 



Typhis liehetatus, Hutton, Trans., ]N".Z. Inst., yoI. ix., t. xvi., 

 fig. 1, 1877. 



Shell ovately fusiform ; whorls seven and a-half, the two^ 

 and a-half embryonic whorls small, smooth, and rounded ; the 

 next one or two squarely rounded and medially keeled ; the- 

 rest subangularly convex, the keel close to the anterior suture. 

 Body whorl somewhat quadrately convex, with four spinous 

 varices which end posteriorly on the blunt posterior keel in a 

 strong spine, anteriorly they are flatly expanded. There are 

 five or six spines on each varix, which diminish in size towards; 



