208 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 37 
Genus DRILLIA Gray. 
DRILLIA ADUSTA Sowerby. 
1833. Pleurotoma adusta SOWERBY, Bess. Zool. Soc., p. 137. 
»Monte Cristi, Ecuador. 
DRILLIA ATERRIMA Sowerby. 
1833. Pleurotoma aterrima SowERBY, Proc. Zool. Soc., p. 187.— 
RrEvE, Con. Icon., Pleurotoma, fig. 100. Monte Cristi, 
Ecuador. 
DRILLIA BOTT Valenciennes. 
1840. Pleurotoma bottz (VALENCIENNES) KIENER, Icon., p. 33,  , 
pl. 15, fig. 12. Gulf of California to Guayaquil. 
DRILLIA CLAVATA Sowerby. 
1833. Pleurotoma clavata SowERBY, Proc. Zool. Soc., p. 185.— , 
Reeve, Con. Icon., Plewrotoma, fig. 132. Ecuador coast. foes y 
DRILLIA COLLARIS Sowerby. ie, 
1833. Pleurotoma collaris SowERBY, Proc. Zool. Soc., p. 1389.— 
REEVE, Con. Icon., Pleurotoma, fig. 120. , Eeuador coast. | 
DRILLIA DISCORS Sowerby. Cas J) 
1833. Pleurotoma discors SowERBY, Proc. Zool. Soc., p. 137.—. = 
~ReEEvE, Con. Icon., Plewrotoma, fig. 38. Ecuador coast. “ z 
DRILLIA LUCTUOSA Hinds. 
1843. Pleurotoma luctuosa Hireps Proc. Zool. Soc., p. 40; Zool. 
Sulph. Voy., p. 18, pl. 6, fig. 4 (as Clavatula). Macdalere 
Bay, Lower California, and south to Guayaquil. 
DRILLIA NIGERRIMA Sowerby. . 
1833. Plewrotoma nigerrima Sow ERBY, Proc. Zool. Soc., p. 
137.—ReEEvE, Con. Icon., Pleurotoma, fig. 102. Gulf of 
California to Ecuador. = peeves 
DRILLIA ROSEA Sowerby. 
1833. Plewrotoma rosea SOwERBY, Proc. Zool. Soc., p. 134.— 
REEVE, Con. Icon., Pleurotoma, ue 43.  Nicone coast | 
and soughwand to Bataleon. A a | Netale Ceca 
DRILLIA RUDIS Sowerby. 
1833. Pleurotoma rudis SowERBy, Proc. Zool. Soc., p. 184.— 
REEVE, Con. Icon., /’lewrotoma, fig. 53. Mazatlan, ae 
-. south to Ecuador andl the Galapagos Islands. 7) .,/), (cc, Le 
DRILLIA RUSTICA Sowerby. 
1833. Pleurotoma rustica SowERBY, Proc. Zool. Soc., p. 138.— 
REEVE, Con. Icon., i leurovon, fig. 91. Mazatlan, Mexico, 
and sont to Bicnador: 
DRILLIA SOWERBYI Reeve. 
1833. Pleurotoma sowerbyi REEVE, Con. Icon., errata, and fig. 
49, Ecuador coast. 
DRILLIA ZONULATA Reeve. 
1848. Pleurotoma zonulata Reve, Syst. Con., vol. 2, pl. 234, 
fig. 10; Con. Icon., Pleurotoma, fig. 839. Coast of Ecuador. 
