. The shell book . CARRIER SHELL AND SUN-DIAL SHELLS 1, 2 Carrier Shell, Xenophora cahulifera, carrying both shells and , 4 Granulated Sun-dial Shell, Solarium , 6 Perspective Sun-dial Shell, Solarium \VE\TLKTK.\rs, VIOLETM ln-ll. Turritclla varicgata. Violet Mi,til, Iintliitta }> : Says \Vt-ntlrtnip, .Stnln , SXAILS AXD OTHERS 4 Precious Wcntletrap, Srala prctiosa. Ladder Shell, Scala Shell, Trichotropis borealis. CHAPTER XXVIII: THE STAIRCASE SHELLS. WENTLETRAPS FAMILY SCALIID^E SHELL white, polished, turreted
. The shell book . CARRIER SHELL AND SUN-DIAL SHELLS 1, 2 Carrier Shell, Xenophora cahulifera, carrying both shells and , 4 Granulated Sun-dial Shell, Solarium , 6 Perspective Sun-dial Shell, Solarium \VE\TLKTK.\rs, VIOLETM ln-ll. Turritclla varicgata. Violet Mi,til, Iintliitta }> : Says \Vt-ntlrtnip, .Stnln , SXAILS AXD OTHERS 4 Precious Wcntletrap, Srala prctiosa. Ladder Shell, Scala Shell, Trichotropis borealis. CHAPTER XXVIII: THE STAIRCASE SHELLS. WENTLETRAPS FAMILY SCALIID^E SHELL white, polished, turreted; whorls sometimes uncoiled,with longitudinal ribs bearing prominent plates; aperture round;operculum spiral, horny. Head has retractile proboscis; tenta-cles close together, with eyes at their bases; jaws toothed or spiny;radula elaborate. Sexes distinct. A creeping, carnivorousfamily of world-wide distribution, allied to lanthinidas. Genus SCALA, Humph. Characters of the family. Living species, 200; fossil species,200. The peculiar flanges that decorate these shells, making themresemble spiral staircases, are the successive limits of periodsof growth. Each in turn has been the shells lip until growthbegan again, and it was le
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Keywords: ., bookcentury1900, bookdecade1900, bookidshellbook00r, bookyear1908
