An introduction to Hydrozoa by Jean Bouillon, Cinzia Gravili, Francesc Pagès, Josep-Maria

By Jean Bouillon, Cinzia Gravili, Francesc Pagès, Josep-Maria Gili, Ferdinando Boero

Show description

Read or Download An introduction to Hydrozoa PDF

Similar introduction books

Bollinger On Bollinger Band

John Bollinger is a huge in today’s buying and selling neighborhood. His Bollinger Bands sharpen the sensitivity of mounted symptoms, permitting them to extra accurately replicate a market’s volatility. by means of extra safely indicating the prevailing marketplace setting, they're visible through many as today’s standard―and so much reliable―tool for plotting anticipated fee motion.

The Ultimate Book on Stock Market Timing, Volume 3: Geocosmic Correlations to Trading Cycles

This can be the main accomplished reference e-book up to now at the courting of geocosmic signatures to reversals within the U. S. inventory indices. it really is written particularly for investors or analysts of U. S. shares and inventory indices who desire to increase their skill to spot severe reversal zones a ways upfront.

Additional resources for An introduction to Hydrozoa

Example text

The circular canal is usually simple and narrow; occasionally it is not hollow and consists of a solid core of endodermal cells (Laingiomedusae, Proboscidactyla). In the Narcomedusae, the circular canal, when present, follows the exumbrellar lobes and the peronia, forming what is called the peripheral canal system and the peronial canals (see glossary). 45 46 Jean Bouillon, C. Gravili, F. -M. Gili & F. Boero FIG. 27. Morphology of the medusae. A-F, Detail of marginal structures: A, part of the bell margin of Eutima coerulea (Leptomedusae) showing a closed statocyst, marginal warts and lateral cirri; B, portion of the umbrella margin of Cosmetira pilosella (Leptomedusae) showing the marginal flexile cirri; C, bell margin of the narcomedusae Pegantha rubiginosa showing the marginal lappets, the peronia, and the otoporpae; D, marginal open statocyst and marginal cirri of Mitrocomella brownei, Leptomedusae; E, part of the bell margin of Orchistoma pileus (Leptomedusae) showing the tentaculiform structures; F, detail of an open statocyst of Mitrocoma (Leptomedusae).

B = bouche ; CG = cavité gastrique ; CGlSpO = cellule glandulaire endodermique orale spumeuse ; CglSphO = cellule glandulaire endodermique orale sphéruleuse ; CGlSphSt = cellule glandulaire endodermique sphéruleuse stomacale ; Cn = cnidocyste ; CR = canal radiaire ; GM = “gonade “ mâle ; LC = lamelle endodermique ou cathamnale ; M = mésoglée ; PLat = poche manubriale latérale radiaire ; RO = pli endodermique oral ; TO = tentacule oral ; ZC = portion cnidogène du manubrium ; ZI = zone intermediaire du manubrium ; ZO = zone orale glandulaire du manubrium ; ZP = zone proximale digestive du manubrium ; ZSt = portion centrale ou stomacale digestive du manubrium.

Boero FIG. 30. Histology of the medusae, diagrammatic illustration of a histological s e c t i o n t h ro u g h t h e manubrium of a sexual mature male medusa of Cladonema radiatum, Anthomedusae (after Bouillon & Houvenhagel, 1970). B = mouth; CG = gastric cavity; CGlSpO = endodermal spumous oral gland cell; CglSphO = endodermal spherulous oral gland cell; CGlSphSt = endodermal stomacal spherulous gland cell; Cn = cnidocyst; CR = radial canal; GM = male “gonad”; LC = endodermal or cathamnal lamella; M = mesoglea; PLat = radial lateral manubrial pouch; RO = endodermal oral fold; TO = oral tentacle; ZC = cnidogenetic portion of the manubrium; ZI = intermediary zone of the manubrium; ZO = oral glandular zone of the manubrium; ZP = proximal digestive zone of the manubrium; ZSt = central or stomachal digestive portion of the manubrium.

Download PDF sample

Rated 4.66 of 5 – based on 20 votes