MOLLUSC A OF PORTO RICO. 
509 
Systematic catalogue of th 
Subclass Amphineura. 
Order Polyplacopitora. 
Family Lepidopleuridae. 
Genus Lepidopleurus Risso. 
Lev idopleurus pergranatus Dal 1 . 
Family Chitonid^e. 
Subfamily IschnochitoninjE. 
Genus Cfletopi.eura Shuttleworth. 
Chcetopleura janeirensis Gray. 
Genus Ischnochiton Gray. 
Subgenus Stenoplax Carpenter. 
Ischnochiton limaciformis Sowerby. 
Ischnochiton purpurascens C. B. Adams. 
Ischnochiton floridanus Pilsbry. 
Subgenus Trachydermon Carpenter. 
Ischnochiton liozonis Dali & Simpson. 
Subgenus Ischnochiton s. s. 
Ischnochiton striolatus Gray. 
Ischnochiton striolatus var. funiculatus 
Carpenter. 
Ischnochiton papillosus C. B. Adams. 
Ischnochiton reticulatus Reeve- 
Subfamily Chi Toni da-:. 
Genus Chiton Linnaeus. 
Chiton tibercidatus Linnaeus. 
Chiton tubercidatus var. assimilis Reeve. 
Chiton squamosus Linnaeus. 
Chiton viridis Spengler. 
Chiton marmoratus Gmelin. 
Genus Acanthopleura Guilding. 
Acanthopleura granulata Gmelin. 
Acanthopleura granulata var. rnucronu- 
lata Shuttleworth. 
Genus Ceratozona Dali. 
Ceratozona rugosa Sowerby. 
Genus Acanthochites Risso. 
Acanthochites spiculosus Reeve. 
Acanthochites spiculosus var. astriger [ 
Reeve. 
Acanthochites hemphilli Pilsbry. 
mollushs of Porto Rico — Continued. 
Class SCAPH0P0DA. 
Order Solenoconcha. 
Family Dentaliida£. 
Genus Dentalium Linnaeus. 
Subgenus Dentalium s. s. 
Dentalium gouldii Dali. 
Subgenus Antalis H. & A. Adams. 
Dentalium faphrium Dali. 
Dentalium disparile d’Orbigny. 
Dentalium ceratum Dali. 
Dentalium antillarum d’Orbigny. 
Subgenus L^evidentalium Cossmann. 
Dentalium callipeplum Dali. 
Dentalium. malar a Dali. 
Subgenus Episiphon Pilsbry & Sharp. 
Dentalium filum Sowerby. 
Subgenus Fustiaria Stoliczka. 
Dentalium stehgschisma Pilsb. & Sh. 
Genus Cadulus Philippi. 
Cadulus carol 'inensis var. bushii Dali. 
Cadulus minusculus Dali. 
Cad, ulus amiantus Dali. 
Cadulus acus Dali. 
Class PELECYPODA. 
Order Prionodesmacea. 
Superfamily Nuculacea. 
Family Nuclei ilk. 
Genus Nucula Lamarck. 
Nucula cegeensis Jeffreys. 
Family Ledid;e. 
Genus Leda Schumacher. 
Led a, acuta Conrad. 
Genus Neilonella Dali. 
Neilonella corpulenta Dali. 
Superfamily Arcacea. 
Family A rciile. 
Subfamily PectunculinjE. 
Genus Glycymeris Da Costa. 
Glycymeris pennaceus Lamarck. 
01 ycym er is pecti/na tus Gm eli n . 
