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"'Nurse' of Doliolum mulleri. I., Inhalant, E., exhalant aperture; C., ciliated band round pharynx (P.); En., endostyle; O., "otocyst"; N., nerve-ganglion; H., heart; (E., oesophageal opening; D., stomach; A., anus; Cl., cloaca; DO., dorsal organ; M., muscle bands." -Thomson, 1916

Doliolum Mulleri

"'Nurse' of Doliolum mulleri. I., Inhalant, E., exhalant aperture; C., ciliated band round pharynx (P.);…

"Sexual individual of Doliolum mulleri. G., gonads; B., gill-slits; I., Inhalant, E., exhalant aperture; C., ciliated band round pharynx (P.); En., endostyle; O., "otocyst"; N., nerve-ganglion; H., heart; (E., oesophageal opening; D., stomach; A., anus; Cl., cloaca; DO., dorsal organ; M., muscle bands." -Thomson, 1916

Doliolum Mulleri

"Sexual individual of Doliolum mulleri. G., gonads; B., gill-slits; I., Inhalant, E., exhalant aperture;…

"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." — Goodrich, 1859

Pyrosoma

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