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rough or angular; aperture entire, round, sometimes triangular; the margins 

 united, mostly fringed or ventricose. 



D. laciniata, D. distorta, D. tubinopsis, 7 fossil species. 



TURBINACEA.— Eight Genera. 



Shell turreted or conoidal; the aperture round or oblong, not effuse; the 

 margins disunited. 



Solarium. Shell orbicular, depressed, conical, umbilicated, crenulated 

 or dentated on the inner margin of the whorls; aperture nearly quadrangular. 

 No columella. 



S. perspectivum, S. laevigatum, S. hybriduin, S. luteum, 



' granulatum, ' stramineum, ' variegatum, 8 fossil species. 



Rotella. Shell orbicular, shining, no epidermis; spire very short, sub- 

 conoidal; lower surface convex and callous; aperture semicircular. 



R. lineolata, 

 '• rosea, 



R. saturalis, 

 ' monolifera, 



R. Javanica, 

 ' formosa, 



R. ffiqualis. 



Trochus. Shell conical, spire elevated, sometimes rather depressed; 

 periphery more or less angular, often thin and sharp; aperture transversely 

 depressed, the margins disunited at the upper part; columella arched, more 

 or less prominent at the base. An operculum. 



T. iraperialis, 



longispina, 



Solaris, 



Indicus, 



radians, 



pileus, 



calyptraeformis, 

 fimbriatus, 

 brevispina, 

 rotularius, 

 Stella, 

 stellaris, 

 asperatus, 

 rhodostomus, 

 spinulosus, 

 costulatus, 

 inermis, 

 agglutinins, 

 coslatus, 

 tuber, 

 magus, 

 merula, 



T. argyrostomus, 

 Cookii, 

 niloticus, 

 pyramidalis, 

 nodu life ras, 

 cosrulescens, 

 obeliscus, 

 virgatus, 

 maculatus, 

 granosus, 

 squarrosus, 

 incrassatus, 

 flammulatis, 

 elatus, 

 marmoratus, 

 mauritianus, 

 imbricatus, 

 triselialis, 

 crenulatus, 

 asperulus, 

 acutus, 

 concavus, 



24 



T. lineatus, 

 ' zizyphinus, 

 ' conuloides, 

 ' conulus, 

 ' jujubinus, 

 ' Javanicus, 

 ' annulatus, 

 ' doliarius, 

 ' granulatus, 

 ' granatum, 

 ' monoliferus, 

 ' iris, 

 ' ornatus, 

 ' bicingulatus, 

 ' calliferus, 

 ' umbilicaris, 

 ' undatus, 

 ' Pharaonis, 

 ' sagittiferus, 

 ' carneolus, 

 ' cinerarius, 

 ' excavatus, 



T. 



nanus, 



pyramidatus, 



erythroleucos, 



undosus, 



unguis, 



olivaceus, 



pellis-serpentis, 



armillatus, 



acuminatus, 



elegantus, 



granosus, 



Ueniatus, 



laevis, 



albidus, 



Clelandii, 



quadricostatus, 



Byronianus, 



elongatus, 



Smithii, 



articulatus, 



filosus, 



Maugeri, 



