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"The compound ascidians, or <em>Botryllidae</em>, are united togetyher by the coalescence of of their mantles, so as to form a leathery or gelatinous mass, ususally attached to stones or sea-weed; in this the seperate animals are imbedded round a common canal, many of them being adorned with beautiful colors, and these masses are of an almost infinte variety of forms." &mdash; Goodrich, 1859

Compound ascidians

"The compound ascidians, or Botryllidae, are united togetyher by the coalescence of of their…

"The compound ascidians, or <em>Botryllidae</em>, are united togetyher by the coalescence of of their mantles, so as to form a leathery or gelatinous mass, ususally attached to stones or sea-weed; in this the seperate animals are imbedded round a common canal, many of them being adorned with beautiful colors, and these masses are of an almost infinte variety of forms." &mdash; Goodrich, 1859

Compound Ascidians

"The compound ascidians, or Botryllidae, are united togetyher by the coalescence of of their…

"The colonies of these singular creatues are in the form of a cartilaginous tube, open at one end. In the walls fo this tube, formed by the coalescence of the mantles of the animals composing it, the bodies of the Ascidians are seperately imbedded, the branchial chamber of each passing completely through the wall from its outer to its innner surface." &mdash; Goodrich, 1859

Pyrosoma

"The colonies of these singular creatues are in the form of a cartilaginous tube, open at one end. In…