Certain varieties of adherent species occasionally assume an erect form.
For Celleporella (colony minute: orifice tubular), see 41 et seq.
Rhynchozoon (see No. 61), in which the primary orifice becomes much obscured by the development of a large mucro, is placed in this section.
Hincks, J. Linn. Soc. xxi. 1889, p. 123.
Micropora complanata, Norman, should be placed in the genus Lepralia. See Hincks, Ann. Nat. Hist. 5 ser. xix. 1887, p. 304.