502 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Systematic catalogue of the mollusks of Porto Rico — Continued. 
Subfamily Bulimulinbs. 
Genus Bulimulus Leach. 
Subgenus Bulimulus s. 
Bulimulus exilis Gmelin. 
Bulimulus exilis var. eyriesii Drouet. 
Bulimulus diaphamus Pfeiffer. 
Genus Drymasus Albers. 
Subgenus Drymjeus s. s. 
Drymcms hjalmarsoni Pfeiffer. 
Drymcms liliaceus Ferussac. 
Drymceus elongatus Bolten. 
Family Helictiul. 
Subfamily Sagdin^e. 
Genus Thysanophora Strebel & Pfeffer. 
Thysanophora dioscoricola C. B. Adams. 
Thysanophora plagioptycha Shuttleworth . 
Tiiysanophora. Tcrugiana von Martens. 
Thysanophora vortex Pfeiffer. 
Thysanophora subaquila Slmttleworth. 
Thysanophora euclasta Slmttleworth. 
Thysanophora musicola Shuttleworth. 
Thysanophora portoricensis Pfeiffer. 
Thysanophora velutina Lamarck. 
Thysanophora arecibensis Pfeiffer. 
Subfamily Helicusle. 
Genus Cepolis Montfort. 
Gepolis dermatina Shuttleworth. 
Cepolis squamosa. Ferussac. 
Cepolis riisei Pfeiffer. 
Cepolis diapluma Lamarck. 
Subfamily Cam/kntnh:. 
Genus Pleurodonte F. de Waldheim. 
Subgenus Pleurodonte s. s. 
Pleurodonte carocolla Linnaeus. 
Pleurodonte bornii Pfeiffer. 
Subgenus Polydontes Montfort. 
Pleurodonte angulata Ferussac. 
Pleurodonte obliterata Ferussac. 
Pleurodonte l uquillensis Sh uttle worth . 
Pleurodonte lima Ferussac. 
Pleurodonte castrensis Pfeiffer. 
Pleurodonte incerta Ferussac. 
Superorder Streptoneura. 
Order Ctenobranciiiata. 
Suborder Orthodonta. 
Superfamily Toxoglossa. 
Family Terebrid^e. 
Genus Terebra Bruguiere. 
Terebra dnerea Born. 
Terebra hastata Gmelin. 
Terebra protexta Conrad. 
Terebra juanica Dali & Simpson. 
Terebra nassula Dali. 
Terebra limatula var. acrior Dali. 
Family Conule. 
Genus Conus Linnaeus. 
Conus delesserti Recluz. 
I Conus agassizii Dali. 
Conus pygmcmis Reeve. 
Conus verrucosus Hwass. 
Conus mus Hwass. 
Conus nebulosus Solander. 
Conus testudinarius Hwass. 
Family Pleurotomidye. 
Genus Pleurotoma Lamarck. 
Subgenus Pleurotoma s. s. 
Pleurotoma albida Perry . 
Subgenus Ancistrosyrinx Dali. 
Pleurotoma radio t a Dali. 
Genus Drillia Gray. 
I Drillia ostrearum, Stearns. 
Drillia albicorna Dali. 
Drillia eucosmia Dali, var. canna Dali 
Drillia nigrescens Gray. 
Drillia f actinocycla Dali & Simpson. 
Drillia gundlachi Dali & Simpson. 
Drillia ponciana Dali & Simpson. 
Drillia melonesiana Dali & Simpson. 
Drillia interpleura Dali & Simpson. 
Drillia albinodata Reeve. 
Drillia albocincta C. B. Adams. 
Drillia solida C. B. Adams. 
Drillia thea Dali. 
Drillia cepynota Dali. 
Drillia lissotropis Dali. 
