64 
ROOM VIII. tiosa (Turbo scalaris. Lin.), or Wendel trap. 
Nat. Hist. 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 
family. In this compartment are also, the ge¬ 
nera of the family Alata, viz.—Rostellaria, 
Pterocera, and Strombus. 
Table 25. Part of the family Purpurifera, 
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 antients obtained their celebrated purple 
dye, which is contained in a bladder-shaped re¬ 
servoir, situated near the stomach. The species 
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 Vol- 
varia. Also, the first genus, of the family Con- 
voluta ;—viz. Ovula, amongst which is the O. 
volva (Bulla voiva, Lin.), or Weaver’s shuttle. 
Table 
