TABLE SHOWING THE CLASSIFICATION OF THE MOLLUSCOIDA 
DESCRIBED IN THIS CHAPTER 
(Exeretory op 
Order 
GYMNOLEMATA 
( Circular lophophore) 
Suborder 
CYCLOSTOMATA 
(Tubular caleareous 
zoccia, with circu- 
lar apertures devoid 
of closing appara- 
tus) 
Suborder 
CHEILOSTOMATA 
(Calcareous or chiti- 
nous zocecia, usu- 
ally with opercula; 
avicularia, vibrac- 
ula, and  ovicells 
often present) 
Class 
POLYZOA 
Subclass 
Ectoprocta 
ing outside lophoph 
of tentacles; tentacles retractile) 
Genera 
ARTICULATA 
(Erect branches divided: Crisia 
at intervals by chitinous 
joints) 
INARTICULATA { Tubulipora 
(Erect or adherent zoa- Diastopora 
rium ; unjointed) 
Aitea 
Eucratea 
Cc ‘ 
CELLULARINA ellularia 
Caberea 
(Flexible erect forms) 
Bugula 
FLUSTRINA 
(Cells quadrate; front | Flustra 
wall of zowecium mem- 
branous or depressed, 
and has ridge-like mar- 
oH Escharella 
ESCHARINA Mollia 
Zi i holt lei- 
aa wholly calci Cellepora 
188 
yphore; mouth in center of circle 
Species 
C. eburnea 
T. flabetlaris 
D. patina 
4. anguinea 
E. chelata 
C. ternata 
C. Ellisit 
B. turrita 
{B. Murrayana 
B. flabellata 
F.membranacea 
M. pilosa 
Membranipora| M. lineata 
M. tenuis 
E. variabilis 
M. hyalina 
C. scabra 
{ C. ramulosa 
C. pumicosa 
