MOLLUSCA OF PORTO RICO. 
491 ) 
SYSTEMATIC CATALOGUE OF THE MOLLUSKS OF PORTO RICO. 
Subkingdom MOLLUSCA. 
Class CEPHALOPODA. 
Order Dibranchiata. 
Suborder Octopoda. 
Family Octopodidae. 
Genus Octopus Lamarck. 
Octopus americanus d’Orbignj 7 . 
Octopus gramdatus Lamarck. 
Octopus telmelchus d’Orbigny. 
Octopus tuberculatus Blainville'b 
Suborder Sepiophora. 
Family Loliginidae. 
Genus Lolioo Lamarck. 
Loligo gahi d’Orbigny. 
Family Sfirulidae. 
Genus Spirula Lamarck. 
Spinda australis Lamarck. 
Class GASTROPODA. 
Subclass Anisopleura. 
(Euthyneuea.) 
Order Pteropoda. 
Suborder Thecosomata. 
Family Cavoliniidae. 
Genus Cleodora Peron & Lesueur. 
Subgenus Creseis Rang. 
Creseis subida Quoy & Gaimard. 
Genus Styliola (Lesueur) Gray. 
Styliola acicida Rang. 
Genus Cuvierina Boas. 
Cuvierina columnella Rang. 
Genus Cavolina Abildgaard. 
Carolina trispinosa Lesueur. 
Carolina longirostris Lesueur. 
Cavolina uncinata Rang. 
Cavolina inflexa Lesueur. 
Carolina gibbosa Rang. 
Order Opisthobranchiata. 
Suborder Tectibranchiata. 
(Cephalaspidea.) 
Family Actaconidae. 
Genus Actaeon Montfort. 
Actaion pun ctostri atu.s C. B. Adams. 
Family Ringiculiile. 
Genus Ringicula Deshayes. 
It ing ici da sem.istr lata d’Orbign v . 
Family Tornatinidac. 
Genus Tornatina A. Adams. 
Tornatina bullata Kiener. 
Tornatina candei d’Orbigny. 
Genus Yolvula A. Adams. 
Volrula oxytata Bush. 
Volvula acuta > d’Orbigny. 
Genus Retusa Brown. 
Retusa valuta Bush. 
Family Bullidae. 
Genus Bulla Linnaeus. 
Bulla amygdala Dillwyn. 
Family Akeeatida:. 
Genus Haminea Leach. 
Haminea deg a. ns Gray. 
Haminea succinea Conrad. 
Family Hydatinidae. 
Genus Hydatina Schumacher. 
^ Hydatina phy sis Linnaeus. 
Genus Micromelo Pilsbry. 
Micromelo undata Bruguicre. 
Family Scaphandridao. 
Genus Atys Montfort. 
Subgenus Atys s. s. 
Atys guildmii Sowerby. 
Atys sandersoni Dali. 
