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T. polygonoides, F. strigosus, F. rubens, F. buccinatus, 



1 verruculatus, ' varius, ' sinistralis, ' aculeiformis, 



' lignarius, ' crebricostatus, ' nifat, ' scalarinus, 



' Syracusanus, ' afer, ' articulatus, ' contrarius. 



Thirteen fossil species are enumerated, and others are referred to, in the Ann. de Mas. 



Pvrtjla. Shell subpyriform, channelled at the base, the upper part ven- 

 tricose, no external varices; spire short, sometimes flattened. Columella 

 smooth; right lip without any fissure. 



P. salmo, P. melongena, P. ternatana, P. nodosa, 



' canaliculata, ' reticulata, ' bezoar, ' citrina, 



' carica, ' ficus, ' rapa, ' abbreviata, 



' perversa, ' ficoides, ' papyracea, ' neritoidea, 



' candelabrum, ' spirata, ' galeodes, * deformis, 



' tuba, ' spirillus, ' angulata, ' lineata, 



' bucephala, ' elongata, ' squamosa, ' plicata. 

 ' vespertilio, 



The fossil species are referred to in the Annates de Museum, vol. 2, p. 389. 



DIVISION II. A constant varix on the right margin, in all the species. 



Struthiolaria. Shell oval, the spire elevated; aperture oval, sinuous, 

 terminated at the base by a very short, straight canal, without any notch. 

 Left lip callous, expanded; right lip sinuous, with an external varix. 

 S. nodulosa, S. crenulata. 



Ranella. Shell oval or oblong, canaliculate; two rows of varices on the 

 exterior; aperture rounded or subovate. Varices straight or oblique, half a 

 whorl distant from each other, and forming a longitudinal row on each side 

 of the shell. 



R. gigantea, 

 ' leucostoma, 

 ' candisata, 

 ' arorus, 



R. crumena, 

 ' spinosa, 

 ' bufonia, 

 ' granulata, 



R. granifera, 

 ' semigranosa, 

 ' bitubercularis, 

 ' ramina, 



R. anceps, 

 ' pygmsea, 

 ' papilla, 



1 fossil species. 



Murex. Shell oval or oblong, channelled at the base, with rough, spined 

 or tuberculated varices on the exterior. Three or more varices on each 

 whorl, the lower ones uniting obliquely with the upper in a longitudinal row; 

 operculum horny. 



*M. cornutus, 

 ' brandaris, 

 ' crassispina, 

 ' tenuispina, 

 ' rarispina, 



M. brevispina, 

 ' ternispina, 

 ' haustellum, 

 ' tenuirostrum, 

 * motacilla, 



M. inflatus, 

 ' elongatus, 

 ' palmarosEe, 

 ' brevifrons, 

 ' calcitrapa, 



M. adustus, 

 ' rufus, 

 ' axicornis, 

 ' crevicornis, 

 ' acaleatus, 



