TROCHID. 311 
turbiniform, solid, smooth, umbilicated; umbilical region 
strongly callous; aperture rounded, outer lip thin. Animal: 
lateral membrane of the foot with numerous compound appen- 
dages. W. Indies. 7. pica, Linn. (1xxxi, 47). 
TEGULA, Lesson. Shell conical, spire pointed, with revolving 
granulated ribs; columella spirally twisted, terminating anteri- 
orly in a large obtuse tubercle. 2 sp. W. tropical America. 
T. pellis-serpentis, Wood (1xxxi, 43). 
CHLOROSTOMA, Swains. Shell conoidal, profoundly umbilicated, 
or umbilical region covered by a callosity ; whorls smooth or 
subearinated, the last subangulated at the base; columellar lip 
spirally twisted around the umbilicus; outer lip angulated at the 
base and sometimes presenting one or two tubercles. 16 sp. 
W. North America, Japan, China. JZ. argyrostomus, Chemn. 
(Ixxxi, 44). 
caeLOTROCHUS, Fischer. Uncharacterized. TT. tiaratus, Quoy. 
New Zealand. 
EURYTROCHUS, Fischer, 1880. Uncharacterized. 4sp. Australia, 
N. Caledonia. 7. Lehmanni, Menke. 
minotiA, A. Adams. (Htym.—Mino-Sina, a Japanese island.) 
Shell globosely conoidal, widely and profoundly umbilicated ; 
whorls rounded, clathrate, suture canaliculate ; last whorl sub- 
solute towards the aperture; umbilicus perspective ; aperture 
circular, pearly within; peristome continuous, thin, acute. 
Distr.—5 sp. Australia, New Caledonia, Japan. T. dianthus, 
Fischer (1xxxi, 45). 
MONILEA, Swains. (Talopia,Gray.) Shell orbicular, depressed, 
widely umbilicated; whorls encircled by grooves, the lastrounded ; 
umbilicus encircled by a striated callus; columella terminating 
anteriorly in one or two tubercles. 5 sp. Pacific, Australia, 
New Caledonia. 7’. calyculus, Wood. 
LEIOTROCHUS, Conrad. Polished, entire, without umbilicus; 
base of columella with two denticles. 4 sp. Miocene; U. 8. 
T. distans, Conr. Described as a subgenus of Monilea. 
SOLANDERIA, Fischer. Uncharacterized. New Caledonia. 7. 
nucleus, Phil. 
GIBBULA, Risso. (Phorcus, Risso. Steromphala, Leach.) Shell 
conoidal, umbilicated ; umbilicus cylindrical or infundibuliform ; 
whorls frequently tuberculated above and with channeled suture ; 
columella sometimes terminating in a tubercular tooth. 26 sp. 
Tropical, world-wide. JT. magus, Linn. (Ixxxi, 46). 
KORENIA, Friele. Separated from Gibbula on account of 
slightly different lingual dentition. European. 
PRIOTROCHUS, Fischer. (Aphanotrochus, Martens.) Shell like 
Gibbula, but pillar-lip denticulated. 2sp. Indian Ocean. 7. 
obscurus, Wood (1xxxi, 50). 
FORSKALIA, H. and A. Adams. Shell babylonic with elevated 
