MUREX. 91 
straightish, canaliculated, not laciniated, and 
pointed at their summit; transversely wrinkled 
and striated; white, varying much in colouring 
and markings; beak umbilicated and compressed; 
throat tinted with reddish purple. 73. W. 25. 
18. 
M. rapix. Ovate-globose, roundish, white, 
with many varices, composed of black ramose 
laciniated separate spines, which are more wide 
than long; spire very short, usually eroded; tail 
umbilicated, and short. 5. 
M. rrRuNcuLUs. Ovate, rough, with six or 
seven spinous varices, transversely semi-granu- 
larly furrowed and striated; whorls angulated, 
with compressed tubercles crowning the shoulder, 
