The following Synopsis of the GENERA of Zoophytes is arranged 

 so as to assist Persons, unacquainted ivith the subject, to identify 

 them by considering the external forms only. 



-.?>®.$-- 



No Polypidom. 



page. 

 136 



74 



81 



83 

 11 



12 



73 



58 



Polypes single, naked, egg shaped, with one circle I jj - ra 



of tubeiculated tentacula, locomotive . . . ^ ^ 

 Polypes single, naked, conoidal, with several circles ) actinia 



of retractile tentacula, locomotive . . . . f 

 Polypes, single, naked, conoidal or columnar, with ^ 



several circles of partially retractile tentacula, >• Anthea . 



locomotive 3 



Polypes single, naked, campanulate ; tentacula in ) t ucernaria 



distant tufts, locomotive f 



Polypes single, naked, egg-shaped, with scattered 1 Cau^se. 



filiform tentacula S 



Polypes single or compound, tentacula irregular, p 



with glandular tips. Polypidom, if present, > Hermia . 



very imperfect j 



Polypes compound, distant, united at their l^^^es 7 ^q^nthus 



by an encrusting trailing band ) 



Polype-mass spongy, covered with stellate depres- } Alcyonium 



sions ji 



* * With horny Folypidoms, external. 



t IFithout cells. 



Polypidoms long, simple tubes, open at the extre- ) Tubularia 13 



mities > 



Polypidoms tubular, closed at the extremities . . Fredericella . 135 



t t Cells sessile, biserial. 



Polypidoms arborescent, formed of sub-parallel ) t^ 15 



tubes ; cells indistinct, tubular or campanulate f 



Polypidoms arborescent, divided into internodes;? c, , „,. jf. 



II J- t- ■.•»!.. J A f Sertularia . ■ lb 



cells distinct, with everted apertures . . . ) 



Polypidoms arborescent, divided into internodes:; ™ ^ „_ 



•"^i, J. ....,,', J '{- Ihuiaria* . . z/ 

 cells distinct, imbedded ) 



t t t Cells sessile, iiniserial. 



Polypidoms arborescent, with plumose branches . Plumularia. . 30 



Polypidoms arborescent, branches in whorls round ) . -,q 



the stem. J Antennulakia . 28 



t t t t Cells sessile, irregular. 



Polypidoms confervoid ; cells in parallel compa- ? r, (.4 



nies, tubular, unilateral i ^erialaria . . J4 



Polypidoms confervoid ; cells disjoined, ovate, uni- ) ^j „ . 



lateral S ^^^^^^^^^^^- ' ^^ 



Polypidoms confervoid ; cells irregularly clustered, / ,^ „c 



elliptical ............ .\ Valkeria . . 95 



X 



