208 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



Genus DRILLIA Gray. 



DRILLIA ADUSTA Sowerby. 



1833. Pleurotoma adusta Soweeby, Proc. Zool. Soc, p. 137. 

 Monte Cristi, Ecuador. 



DRILLIA ATERRIMA Sowerby. 



1833. Pleurotoma aterrlma Sowerby, Proc. Zool. Soc, p. 137. — 

 Reeve, Con. Icon., Pleurotoma^ fig. 100. Monte Cristi, 

 P^cuador. 



DRILLIA BOTT.1E Valenciennes. 



1810. Pleurotoma hottse (Valenciennes) Kiener, Icon., p. 33, 

 pi. 15, fig. 12. Gulf of California to Guayaquil. 



DRILLIA CLAVATA Sowerby. 



1833. Pleurotoma clavata Sowerby, Proc. Zool. Soc, p. 135. — 

 Reeve, Con. Icon., Pleurotoma, fig. 132. Ecuador coast. 



DRILLIA COLLARIS Sowerby. 



1833. Pleurotoma collaris Sowerby, Proc. Zool. Soc, p. 13t>. — 

 Reeve, Con. Icon., Pleurotoma^ fig. 120. Ecuador coast. 



DRILLIA DISCORS Sowerby. 



1833. Pleurotoma dlscors Sowerby, Proc. Zool. Soc, p. 137. — 

 Reeve, Con. Icon., Pleurotoma, fig. 38. Ecuador coast. 



DRILLIA LUCTUOSA Hinds. 



1843. Pleurotoma luctuosa Hinds, Proc. Zool. Soc, p. 40; Zool. 

 Sulph. Voy., p. 18, pi. 6, fig. 4 (as Olavatula). Magdalena 

 Bay, Lower California, and south to Guayaquil. 



DRILLIA NIGERRIMA Sowerby. 



1833. Pleurotoma nigerrima Sowerby, Proc Zool. Soc, p. 

 137. — Reeve, Con. Icon., Pleurotoma, fig. 102. Gulf of 

 California to Ecuador. 



DRILLIA ROSEA Sowerby. 



1833. Pleurotoma rosea Sowerby, Proc. Zool. Soc, p. 134. — 

 Reeve, Con. Icon., Pleurotoma, fig. 43. Nicaragua coast 

 and southward to Ecuador. 



DRILLIA RUDIS Sowerby. 



1833. Pleurotoma rudis Sowerby, Proc. Zool. Soc, p. 134. — 

 Reeve, Con. Icon., Pleurotoma, fig. 53. Mazatlan, Mexico, 

 south to Ecuador and the Galapagos Islands. 



DRILLIA RUSTICA Sowerby. 



1833. Pleurotoma rustica Sowerby, Proc Zool. Soc, p. 138. — 

 Reeve, Con. Icon., Pleurotoma, fig. 91. Mazatlan, Mexico, 

 and south to Ecuador. 



DRILLIA SOWERBYI Reeve. 



1833. Pleurotoma sowerbyi Reeve, Con. Icon., errata, and fig. 

 49. Ecuador coast. 



DRILLIA ZONULATA Reeve. 



1843. Pleurotoma zonxdata Reeve, Syst. Con., vol. 2, pi. 234, 

 fig. 10; Con. Icon., Pleurotoma, fig. 39. Coast of Ecuador. 



