194 



Spire short, scalar. 



Peripheral angle margined ; posterior slope flat or concave. 



5. C. ligatus. 

 Peripheral angle not margined ; shoulder sloping backwards. 



6. C. heterospira. 

 Spire moderate, with an uninterrupted slope. 



Suture of spire-whorls crenulated ; body-whorl smooth. 



7. C. Balphii, 

 Suture concealed ; body-whorl with spiral rows of granules. 



8. C. acrotholoides. 

 Spire moderate, the whorls slightly angulated. 



Pullus small, subacute, the tip obliquely immersed. 



Body-whorl spirally sulcate ; posterior spire-whorls crenu- 

 lated at the keel. 9. C. extenuatus. 

 Body -whorl smooth or obsoletely lirate; anterior whorls 

 nodulose at the keel. 10. C. Hci'miltonensis. 

 Pullus subcylindrical, obtuse. 11. C. Murravianus. 

 Spire elongate ; outer lip broadly sinuous, anal sinus deep and 

 oblique (Conorbis). 12. C. atractoides. 



SPECIES EXCLUDED AND SYNONYMIC. 



C. TraiUii, Hutton. The published occurrences of this species 

 in Australia refer to C. Murravianus and C. ligatus. 



C. jJctpmosus, Tate (ms.). The name being preoccupied cuspi- 

 datus is herein substituted. 



C. scalaris, Tate (ms.). The name being preoccupied ligatus is 

 herein substituted. 



1. Conus euspidatus, sj^ec. nov. 



Shell conoidal, about twice as long as wide, wdth a flat or very 

 low spire ; spirally fine-ribbed on the spire and at the base, other- 

 wise usually smooth. 



Spire consisting of seven whorls separated by a well-defined, 

 impressed, linear suture with rudely crenate margins ; ornamented 

 spirally by flatly-rounded unequally-sized threads (usually about 

 nine en the penultimate whorl), varying somewhat in thickness, 

 but usually as wide as the interstitial furrows, crossed by incurved 

 growth-lines. 



The spire terminates in a slender, pyramidal, acutely-pointed 

 pullus consisting of five smooth moderately convex whorls of slow 

 increase. 



Body-whorl obtusely angled at the periphery, regularly tapering 

 to about three-fourths of its height where it is slightly constricted ; 

 ornamented with sigmoid striae of growth, and in tlie anterior- 

 fourth by wrinkled threads, narrower than the interspaces. Some 

 young shells have punctated impressed lines on the body-whorl. 



