The Shell-Collector’s Handbook. 55D 
v. Roissyi (.Wich.): Shell less arched above, not sinuous 
below, larger posteriorily (=U. Roissy’, Mich., Compl., 
p. 112, pl. xxvi., figs. 27 and 28). 
v. Sinuata (Zam.): Shell yellowish-brown, broader in 
proportion to length than type; lower margin incurved 
towards the middle (=U. simuata Lam. Mist. An. s. v. 
mm pl. 1, p. 70). 
