500 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Systematic catalogue of the moWusks of Porto Rico — Continued. 
(Anaspidea.) 
Family Aplysiida. 
Subfamily Aplysina. 
Genus Tethys Linnaeus. 
Tethys protea Rang. 
Tdhys cervina Dali & Simpson. 
Tethys parvula (Guilding) Morch. 
Subfamily Dolabriferina. 
Genus Dolabkifera Gray. 
Polabrifera ascifera Rang. 
Dolabrifera sowerbyi Guilding. 
Genus Notarchus Cuvier. 
Notar chus pleii Rang. 
(Notaspidea.) 
Family Pleurobranchida. 
Genus Pleurobranchus Cuvier. 
Plea rob ranch ics lacteus Dali & Simpson. 
O rder N udibranch iata . 
Family Doridida Cry pto bra nciiiata. 
Genus Geitodoris Bergli. 
Qeitodoris inollima Bergh. 
Order Pulmonata. 
Suborder Basommatophora. 
Superfamily Akteophila. 
f amily Auriouljda. 
Genus Melampus Montfort. 
Subgenus Melampus s. s. 
Melampus coffeus Linnaeus. 
Melampus Jtavus (Gmelin ?) Binney. 
Genus Tralia Gray. 
Subgenus Tralia s. s. 
Tralia pus ilia Gmelin. 
Genus Pedipes Scopoli. 
Pedipcs mirabilis Miihlfeld. 
Genus Blauneria Shuttleworth. 
Rlcuuneria heteroclita Montagu. 
Superfamily Limnopiiila. 
Family Limnaida. 
Subfamily Libinaina. 
Genus Libinaa Lamarck. 
Limncea cubensis Pfeiffer. 
Subfamily Planorbina. 
Genus Planorbis Geoffroy. 
Planorbis guadaloupensis Sower by. 
Planorbis tumidus Pfeiffer. 
Planorbis riisei Dunker. 
Planorbis refulgens Dunker. 
Planorbis haldemani C. B. Adams. 
Planorbis schrammi Crosse. 
Planorbis lucidus Pfeiffer. 
Planorbis macnabianus C. B. Adams. 
Planorbis circumlineatus Shuttleworth 
Genus Planorbula Haldeman. 
Planorbula albicans Pfeiffer. 
Family Ancylida. 
Genus Ancylus Geoffroy. 
Ancylus obscurus Haldeman. 
Ancylus beau! Bourguignat. 
Family Physida. 
Genus Aplexa Fleming, 
Aplexa sowerbyana d’Orbigny. 
Suborder Stylommatophora. 
Superfamily Ditremata. 
(Vasopulmonata). 
Family Onchidiida. 
Genus Onchidella Gray. 
On chidella floridana Dali. 
Family Veronicellida. 
Genus Veronicella Blainville. 
Yeronicella occidentalis Guilding. 
(Orthurethra.) 
Family Pupida. 
Genus Bifidaria Sterki. 
Bifdaria pellucida Pfeiffer. 
