. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . th ex-treme rapidity and lives on exposed beaches near low-water mark. N. coniocephala. Two and a half inches long, one sixteenth of aninch in diameter ; head conical; body flattened on the dorsal side, roundon the ventral side ; has two long tentacles turned backward and a mem-brane on the gills of the anterior segments ; gills red ; bristles long andnumerous. FAMILY CIRRATULIDJE Worms of this family have a cylindrical body, more or less atten-uated at each end ; segments sim
. The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between tidemarks . th ex-treme rapidity and lives on exposed beaches near low-water mark. N. coniocephala. Two and a half inches long, one sixteenth of aninch in diameter ; head conical; body flattened on the dorsal side, roundon the ventral side ; has two long tentacles turned backward and a mem-brane on the gills of the anterior segments ; gills red ; bristles long andnumerous. FAMILY CIRRATULIDJE Worms of this family have a cylindrical body, more or less atten-uated at each end ; segments similar throughout; many segmentswith long, filamentouscirri which act as gills;and a conical live in burrows. GENUS Citifttulus €. grandls. Four tosix inches long; headacute; segments numer-ous, short, and distinct;color dull yellow, ororange, 1o brown, ofteniridescent beneath; ven-tral surface somewhatllattrncil. Numerouslong, filamentous, red toorange-colored cirri ex-tend nearly the wholelength of the body and;ic1 as gills. It is com-mon in sand and gravelat low-water mark fromCape Cod to New 182 MARINE INVERTEBRATES FAMILY TEKEBELLIIKZE The body is cylindrical and largest on the anterior end; thereare one to three pairs of more or less branched gills on the an-terior end, and the ventral surface of the anterior segments is thickened by glands which secrete mu-cus for tube-building. These gland-spaces are called shields. GENUS Thelepsus T. cincinnatus. Two to four incheslong; pale red; marked like lacework onthe back; gills have numerous unbranchedfilaments arising separately in two trans-verse rows; tubes thin, transparent, flexible,and hung with foreign substances ; attachedalong the whole length. GENUS Ampliitrite A. ornata. Twelve to fifteen incheslong; flesh-color, reddish, or brown; threepairs of red plume-like gills and numerousflesh-colored tentacles around the anteriorend; tentacles constantly in motion and sometimes extended eight or ten inches;
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmarinea, bookyear1901
