65 
tiosa (Turbo sealaris. Lin.), or Wendel trap. 
The first genus of the family of the Canalifera^ 
Cerithium, is also in this compartment. 
Table 23. Genera of the Canalifera con¬ 
tinued, viz.—Pleurotoma, Turbinella, Cancel- 
laria, Fasciolaria, Fusus, Pyrula, Struthiolaria, 
Ranella, Murex, and 
Table 24. Triton, the last genus of this fa¬ 
mily. In this compartment are also the genera 
of the family Alata^ viz.—Rostellaria, Pterocera, 
and Strombus. 
Table 25. Part of the family Furpurifera^ 
viz.—the genera Cassidaria, Cassis, Ricinula, 
Purpura, Monoceros, Concholepas, Harpa, Do- 
lium, and part of the genus Buccinum. From 
the molluscous animal, inhabiting the purpura, 
the ancients obtained their celebrated purple 
dye, which is contained in a bladder-shaped re¬ 
servoir, situated near the stomach. The spe¬ 
cies P. patula (Buccinum patulum. Lin.) is said 
to have afforded the finest colour. 
Table 26. Buccinum continued, Eburna, 
Terebra. The next family is Columellaria^ two 
genera of which are in this compartment, viz. 
Columbella and Mitra. The species Mitra zo- 
nalis is an unique shell. 
Table 27. The genera of the Columellaria 
continued, viz. Voluta, Marginella, and Volva- 
ria. Also, the first genus of the family Convo- 
luta; —viz. Ovula, amongst which is the O. 
volva (Bulla volva. Lin.), or Weaver’s Shuttle. 
F Table 
ROOM VIII. 
Nat, Hist. 
