. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . PLATE LXXIV. 1, Colunibella mercatoria, enlarged. 4, Nassa fossata, about natural size. 2, Columbella (Amphissa) corrugata, en- 5, Nassa mendica, enlarged. larged. 6, Nassa perpinguis, enlarged. 3, Columbella (Astyris) gausapata, much 7, Nassa tegula, enlarged. enlarged. 8, Siphonalia kellettii, , Tritonidea tincta. GASTEROPODS 389 lines on a white background, or of white splotches on a brownish back-ground. (Plate LXXIV.) C. (Anachis) <n<n-a, and the variety C.
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . PLATE LXXIV. 1, Colunibella mercatoria, enlarged. 4, Nassa fossata, about natural size. 2, Columbella (Amphissa) corrugata, en- 5, Nassa mendica, enlarged. larged. 6, Nassa perpinguis, enlarged. 3, Columbella (Astyris) gausapata, much 7, Nassa tegula, enlarged. enlarged. 8, Siphonalia kellettii, , Tritonidea tincta. GASTEROPODS 389 lines on a white background, or of white splotches on a brownish back-ground. (Plate LXXIV.) C. (Anachis) <n<n-a, and the variety C. sun His. These ratherslender shells, about one half to three fifths of an inch long, occur fromFlorida northward to Cape Cod. The upper whorls are smooth, thelower ones are undulated with vertical costse (ten to thirteen), and thebody-whorl is encircled below the middle by a series of revolving, closelyset grooves. The aperture is typical of the genus, though less stronglymarked by internal callosity on the outer lip and with less prominentteeth than in C. mercntoria. The greater development of the revolvinggroo
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
