ZOOPHYTA ASCIDIOIDA. 
247 
* Natives of the sea, (Tentacula forming a perfect 
circle.) Polypiaria infundibulati , P. Gervais. 
Family I. VESICULAR1 ADiE. 
Polypidoms corneous , Jistular , confervoid : cells vesicular , 
deciduous , non-operculate . 
22. Vesicularia. Cells ovate, disjunct, uniserial, unilateral. 
23. Serial aria. Cells tubulous, adjacent, uniserial, unilateral, 
24. Valkeria. Cells ovate, clustered, or in pairs. 
25. Bowerbankia. Cells elliptical, irregularly scattered, unila- 
teral. 
Family II. CRISIADAS. 
Polypidom calcareous or subcalcar eous, branched , confervoid , 
jointed : the cells Imked together in one or more series , distinct , 
tubular or elliptical , with a terminal or subterminal aperture , 
never closed with an operculum . 
26. Crisia. Cells tubular, catenated in one or two alternating 
series, the aperture round and terminal. 
27. Notamia. Cells ovate, geminate, opposite, the aperture 
subterminal. 
28. Hippothoa. Cells elliptical, linked together, the aperture 
superior and lateral. 
29. Anguinaria. Cells spathulate, separate, the aperture lateral. 
Family III. TUBULIPORIDAi. 
Polypidoms calcareous , variable in shape but never confervoid : 
cells tubular , rowed ', rising from a base and projecting, the aperture 
terminal and non-operculate. 
30. Tubulipora. Cells tubular, rowed, with distinct parietes. 
31. Discopora. Cells tubular, quincuncial, confluent. 
Family IV. CELLEPORIDiE. 
Polypidoms calcareous or membrano -calcareous, lobed, ra - 
mous or crustaceous, formed of an aggregation of cells disposed 
usually in quincunx : cells utricular, in juxta-position, with a 
contracted terminal aperture, often covered with an operculum, 
32. Cellepora. Polypidom lobed or ramous ; cells heaped. 
33. Lepralia. Polypidom crustaceous ; the cells in a single lay- 
er, rowed, subalternate, with a contracted orifice. 
