A group of Tunicata often shaped like a-two necked bottle The group includes social and compound species The gill is a netlike construction within the dental aperture The integument is normally leathery in surface See example in Appendix
- A group of Tunicata, usually shaped like a two-necked bottle. The group includes, personal, and compound species. The gill is a netlike construction in the oral aperture. The integument is generally leathery in surface. See Illustration in Appendix.