. Descriptive catalogue of the Tunicata in the Australian museum, Sydney, Tunicata. THE TUNICATA OF. THE AUSTRALIAN MUSEUM. TUNICATA. The Tunicata (or Urochorda) are hermaphrodite marine chordate animals which show in their development the essential vertebrate characters, but in which the notochord is restricted to the posterior part of the body, and is in most cases present only during the free-swimming larval stages. The adult animals are usually sessile and degenerate, and may be either solitary or colonies, fixed or free. The nervous system is in the larva of the elongated, tubular,
. Descriptive catalogue of the Tunicata in the Australian museum, Sydney, Tunicata. THE TUNICATA OF. THE AUSTRALIAN MUSEUM. TUNICATA. The Tunicata (or Urochorda) are hermaphrodite marine chordate animals which show in their development the essential vertebrate characters, but in which the notochord is restricted to the posterior part of the body, and is in most cases present only during the free-swimming larval stages. The adult animals are usually sessile and degenerate, and may be either solitary or colonies, fixed or free. The nervous system is in the larva of the elongated, tubular, dorsal vertebrate type, but in most cases degenerates in the adult to form a small ganglion placed above the pharynx. The body is completely covered with a thick cuticular test ("tunic") which contains a substance similar to cellulose. The alimentary canal has a greatly enlarged respiratory phatynx (the branchial sac) which is perforated by two or many more or less modified gill slits, opening into a peri-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Australian Museum; Herdman, W. A. (William Abbott), Sir, 1858-1924. Liverpool, T. Dobb & co.
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Keywords: ., bookauthorherdmanwawilliamabbot, bookcentury1800, bookdecade1890
