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. T. pica, Linn. (Ixxxi, 41). 



TEGULA, Lesson. Shell conical, spire pointed, with revolving- 

 granulated ribs ; columella spii'ally twisted, terminating anteri- 

 orly in a large obtuse tubercle. 2 sp. W. tropical America. 

 T. pellis-serpentis, Wood (Ixxxi, 43). 



CHLOROSTOMA, Swains. Shell conoidal, profoundly umbilicated, 

 or umbilical region covered by a callosity ; whorls smooth or 

 subcarinated, the last subangulated at the iDase ; 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. T. argyroiitomus, Chemn. 

 (Ixxxi, 44). 



CCELOTROCHUS, Fischcr. Uncharacterized. T. tiaratus, Quoy. 

 New Zealand. 



EURYTROCHUS, Fischer, 1880. Uncharacterized. 4sp. Australia, 

 N. Caledonia. T. Lehmanni, Menke. 



MINOLTA, A. Adams. {Etym. — 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 (Ixxxi, 45). 



MONiLEA, Swains. (Talopia, Gray.) Shell orbicular, depressed, 

 widely umbilicated; whorls encircled by grooves, thelastrounded ; 

 umbilicus encircled by a striated callus ; columella terminating 

 anteriorly in one or two tubercles. 5 sp. Pacific, Australia, 

 New Caledonia. T. calyculus, Wood. 



LEiOTRocHus, Courad. Polished, entire, without umbilicus ; 

 base of columella with two denticles. 4 sp. Miocene ; U. S. 

 T. distans, Conr. Described as a subgenus of Monilea. 



SOLANDERIA, Fischcr. Uncharacterized. New Caledonia. T. 

 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. T. magus, Linn. (Ixxxi, 46^. 



KORENiA, Friele. Separated from Gribbula on account of 

 slightl}'^ different lingual dentition. European. 



PRiOTROCHUs, Fischer. (Aphanotrochus, Martens.) Shell like 

 Gibbula, but pillar-lip denticulated. 2 sp. Indian Ocean. T. 

 obscurus, Wood (Ixxxi, 50). 



FORSKALiA, H, and A. Adams. Shell babylonic with elevated 



