180 CLASS III. GASTEROPODA. ORDER VII. PECTINIBRANCHIATA,. 
varieties were referred to the Murices ; the short, or bucciniform varieties, 
to the Volute; it is unnecessary, however, to say how essentially they 
differ from both these genera as restricted in the present day. Two 
attempts have been made to increase the subdivision of the Turbinelli, 
which may perhaps be worthy of notice, although we cannot appreciate 
either of them. The Turbinellus polygonus was set apart as a type for a 
new genus by Schumacher under the title of Polygonum, and by De Mont- 
ford under that of Latirus ; the Turbinellus scolymus was also distinguished 
by Swainson under that of Scolymus. 
The shell of Turbinellus may be described as being either fusiform, or 
bucciniform, solid, very often nodose, and generally covered with a thick 
epidermis ; the spire, which varies considerably in length, is somewhat 
obtuse at the apex; the aperture is longitudinal, and narrow; and the 
columella, which has from three to five compressed, transverse plaits, ends 
sometimes in a long, sometimes in a very short, straight canal. The oper- 
culum is small, horny, and acuminated. 
Ewamples. 
Pl. CCXXVIII. Fig. 1 to 3. 
TuRBINELLUS pyruM, Lamarck, Anim. sans vert., vol. vii. p. 104. Chem- 
nitz, Conch., vol. xi. pl. 176. f. 1697 and 1698. 
Pl. CCXXIX. Fig. 1. 
TURBINELLUS VEXILLULUM, Nobis, Proceedings Zool. Soc., 1842. 
Pl. CCXXIX. Fig. 2. 
, 
TURBINELLUS ACUMINATUS, Kiener, Iconographie des Coquilles vivantes, 
plist. 2. 
Murex acuminatus, Wood. 
Pl. CCXXIX. Fig. 3. 
TurBINELLUS RIGIDUS, Gray, MSS. British Museum. 
Murex rigidus, Wood, Index Testaceologicus, pls. fi. 3 
