. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . ILY PUKPUKINJE This is considered a subfamily of the Nurici<lnrlii<t has a lateral nucleus instead of asubterminal one, but beyond this there are no essential differ-ences. The shell of the purpuras is generally heavy and solid,being adapted to a life among rocks which are exposed to thebeating of the surf. There is a lack of that extravagantsculptural design so characteristic of the true murices, most ofthe purpuras being comparatively smooth, in order, no doubt,that th
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . ILY PUKPUKINJE This is considered a subfamily of the Nurici<lnrlii<t has a lateral nucleus instead of asubterminal one, but beyond this there are no essential differ-ences. The shell of the purpuras is generally heavy and solid,being adapted to a life among rocks which are exposed to thebeating of the surf. There is a lack of that extravagantsculptural design so characteristic of the true murices, most ofthe purpuras being comparatively smooth, in order, no doubt,that they may offer as little resistance us possible to the rushing,seething waters of exposed rocky shores. The Ilir/mriiiti, like some of the murices, when mutilated,exude a reddish-purple fluid. On account of this, the ancientRomans used to gather ureal quantities of certain Mediterraneanforms belonging to these families, place them in lar^-e mortars, 25. 386 MARINE INVERTEBRATES and grind them up, shell and all. A garment dipped in themixture and then exposed to the sun would receive a rich purpledye. This was the basis of the famous Tyrian purple. Theprocess was lost, and was rediscovered many centuries later, butit was long ago abandoned in favor of the far superior modernchemical dyes. GENUS Purpura P. Ifipillns. No one who has ever spent an observant hour among therocks at low tide, on the shores of Massachusetts or Maine, has failed tonotice the myriads of P. lapillus clinging to the barnacle-covered boul-ders, or slowly creeping about in the tide-pools. This rather pretty little mollusk is a native of Great Britain, and thereattains its greatest development and exhibitsbest its marvelous range of variation. It ispresumed to be an immigrant in Americanwaters, having found its way across the seaby Iceland and Greenland, and thence downthe coast. As it is a cold-water animal, andcan only survive in open, rocky stations, it willprob
Size: 1816px × 1375px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
