Medusae of the world
Bibliographic Data
| ID | 23514033 |
|---|---|
| Authors | Alfred Goldsborough Mayer (University of London, corresponding author) |
| Year | 1910 |
| Publication date | 1910-01-01 |
| Open Access | Yes |
| Type | BOOK |
| Publisher | Carnegie Institution of Washington, (PUBLISHER) |
| DOI | 10.5962/bhl.title.159245 |
| OpenAlex | W4247437260 |
| Language | EN |
| Citations received | 2 |
Nor can one remain insensible to the rare grace of form and delicate beauty of color of these creatures of the sea, associated as their study is with memorials of the labors of a host of distinguished naturalists.Dry though these pages must be to the reader, to the writer they are replete with memories of the ocean in many moods, of the palm-edged lagoons of coral islands sparkling in the tropic sun, of the cold, gray waters of the northern sea bestrewn with floating ice, of days of withering calm in the heat of the torrid zone, and of adventure in the hurricane ; all centering around the absorbing study of the medusa?.Love, not logic, impels the naturalist to his work.This book attempts to present a new classification of the medusae.With every respect for Haeckel's great work, it has appeared to me that its subdivisions are often too precise to be convenient, and too artificial to accord with nature.Moreover, many of Haeckel's genera are founded upon intergrading characters, and are thus imperfectly separated.The young of many medusae appear in one genus, and the adults in another.The aim of Haeckel's system is to emphasize distinctions, whereas my aim is to indicate relationships.I therefore attempt to separate genera upon positive, not upon relative, distinctions.For example, if we define one genus as having a narrow manubrium (Margelis), and another as having a wide manubrium (Boiigamvillta), we must either institute a third genus for newly-discovered medusae with manubria of moderate width or place them doubtfully in one or the other of the genera of the extreme members of the series.ANTHOMEDUS^:.HYDROMEDUS/E OR VEILED MEDUS/E.Medusae with a velum, or diaphragm, which partially closes the marginal opening of the bell.When ripe the sexual products are found in the ectoderm.With a double marginal nerve-ring, one above and one below the velum.Without gastric filaments.Development either direct from actinula larvae or through alternation of generations from hydroids.Order 1. ANTHOMEDUS/E Haeckel, 1879.Hydromedusae with gonads in the ectoderm of the manubrium.Without otocysts.The hydroids are of the Tubularian order.Family No. i, CODONID.&.Anthomedusae with ring-like gonad encircling the manubrium.Four to six simple, unbranched radial-canals.Simple, unbranched tentacles.Subfamily No. i, SARSIANJE.Some or all of the tentacles arise singly, not in clusters, from bell-margin.
Geography · Ancient Mediterranean Archaeology and History · Classical Antiquity Studies · Historical, Religious, and Philosophical Studies
| Citations per year | 0.02 |
|---|---|
| Citation span | 1924 - 2016 (93) |
| Highly cited | No |