The animal life of our seashore With special reference to the New Jersey coast and the southern shore of Long Island . Nidus of Natica hekos. the first may be recognized by its larger size andmore globular outline, and in having a deep hole(umbilicus) immediately alongside the Natica duplicata the shell is more depressed and. Nidus of Natica duplicata. somewhat oblique, while the umbilical apertureis closed by a thick * callous expansion. Thethird species is Natica pusilla. In your rambles THE SHELL-FISH OF THE COAST. 29 along the beach you cannot fail to have noticedpeculiar gray,
The animal life of our seashore With special reference to the New Jersey coast and the southern shore of Long Island . Nidus of Natica hekos. the first may be recognized by its larger size andmore globular outline, and in having a deep hole(umbilicus) immediately alongside the Natica duplicata the shell is more depressed and. Nidus of Natica duplicata. somewhat oblique, while the umbilical apertureis closed by a thick * callous expansion. Thethird species is Natica pusilla. In your rambles THE SHELL-FISH OF THE COAST. 29 along the beach you cannot fail to have noticedpeculiar gray, collar-like bodies scattered about,some of them forming almost complete circles, andmeasuring six inches or more across. Examined,these collars are seen to be made up of minute sand-particles glued together, and if held up to the lightexhibit an almost innumerable number of translu-cent spots. These spots correspond to the positionsof egg-cases which are distributed throughout themass in a single layer, and in quincunx whole is, in fact, the egg-ribbon or nidus ofthe Natica—a construction unlike that of any othermollusk. Just how it is made still remains a mys-tery, but it appears that as it is extruded in theform of a viscous mass it is immediately mouldedover the external face of the shell, which gives toit its pec
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmarineanimals, bookye
