190 CLASS III. GASTEROPODA. ORDER VII. PECTINIBRANCHIATA. 
referable to his new genera Turbinellus, Fasciolaria and Pleurotoma, he 
found that there yet remained a certain portion whose shells are emi- 
nently distinguished by their assuming a somewhat pyriform shape 
through an unusual depression of the spire. These he in consequence 
associated under the title of Pyrula, and we recommend it to naturalists 
as a genus that may be profitably adopted. The Pyrula perversa was 
selected by De Montford as the type of a new genus with the title of Ful- 
gur ; we think, however, that that species might rather be referred to 
the genus now under consideration. If any further subdivision were 
thought advantageous, we should suggest the adoption of a genus, in- 
troduced by Swainson with the name of Ficula, for that portion of the 
Pyrule which are vulgarly called the “ Fig Shells.” Another section 
of Pyrule, of which the Pyrula papyracea is the type, remarkable for 
the light papyraceous structure of their shells, and arranged on that 
account by Linnzus with the Bulle, constitutes the genus Rapanus of 
Schumacher. 
The shell of Pyrula may be described as being rather pyriform, with 
the spire short, and sometimes blunt ; the columella is smooth, and ends 
in a canal, which is sometimes long, sometimes very short ; the aperture 
is mostly of the shape of an oblong oval, and the lip is simple, and rather 
sharp, with the interior often striated. The operculum is horny. 
° Examples. 
Pl. CCXXXVI. Fig. 1 and 2. 
Pyruta Mawa*, Gray. Griffith’s Cuvier, Animal Kingdom, pl. 25. f. 3 
and 4. 
Pl. CCXXXVI. Fig. 3. 
Pyruta rapa, Lamarck, Anim. sans vert., vol. vii. p. 144. Martini, 
Conch., vol. ii. pl. 68. f. 750 to 753. Encyclopédie Méthodique, 
pl. 434. f. 1. a, 6. 
Buccinum ampullaceum, Lister. 
Murex rapa, Gmelin. 
Rapa muricata, Knorr. 
* Cabinet of the Rev. Mr. Stainforth. 
