The Victorian naturalist . Siphonaria dicmenensis Nerita atramentosa Figure 8. The more common gastropod molluscs of the intertidal zone.(Scale line =: cm.)Cellcma tramoserica Patelloida alticostata. The most conspicuous animals inthe midlittoral zone are the gastropodmolluscs (Figure 8). Austrocochleaconstricta (Ribbed Top Shell) andBembicium nanum (Striped MouthConniwink) are most common andoccur throughout this zone and inrock pools. The striking black neriteor crow shell, Nerita atramentosa,formerly Melanerita melanotragus, isalso abundant, with highest densitiesin crevices sheltered f
The Victorian naturalist . Siphonaria dicmenensis Nerita atramentosa Figure 8. The more common gastropod molluscs of the intertidal zone.(Scale line =: cm.)Cellcma tramoserica Patelloida alticostata. The most conspicuous animals inthe midlittoral zone are the gastropodmolluscs (Figure 8). Austrocochleaconstricta (Ribbed Top Shell) andBembicium nanum (Striped MouthConniwink) are most common andoccur throughout this zone and inrock pools. The striking black neriteor crow shell, Nerita atramentosa,formerly Melanerita melanotragus, isalso abundant, with highest densitiesin crevices sheltered from direct waveaction. These gastropods feed bybrowsing on encrusting algae in themidlittoral zone. B. nanum and are a common foodsource for the small predatory gas-tropod Lepsiella vinosa (Wine-MouthLepsiella). Lepsiella occurs through-out the midlittoral zone, but in wintermoves into the lower reaches of thesupralittoral fringe where it feeds onLittorina spp. L. vinosa preys onvarious molluscs and barnacles, eat-ing their flesh after boring a holethrough their external shells. Thisspecies is a good example of an or-ganism whose intertidal distributionis controlled by biological fa
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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1884
