ANTHOZOA. 
Ccel. 19 
ZOANTHIDA3. 
1 
New Family Mardoellid;e. 
Zoanthidce forming colonies, which, by means of a common rounded 
basal part, live freely in or upon sand without attachment. 
V Mardoella, n. g. Mardoellidce with firm, encrusted integument ; endo- 
dermal circular muscles. Macrosepta perfect, carrying reproductive 
organs and mesenterial filaments. Microsepta imperfect, sterile. A 
siphonoglyphe . Dioecious. M. erdmanni , p. 117, 191-870 fathoms. 
Epizoanthus arborescens , p. 126, 135 fathoms. E. glacialis, p. 129, 457, 
& 620 fathoms. E. roseus , p. 134, 620 fathoms. 
CERIANTHEiE. 
Cerianthus vogti , p. 137, 498 fathoms. C. abyssorum , p. 143, 
634 fathoms. 
Tribe AEGIRE2E. 
Actinida with a perfect body cavity (coelom), and a developed digestive 
apparatus consisting of oesophagus, intestine, and anus. 
The two genera, Fenj a and Aegir, belonging to this family were described 
two years ago [vide Zool. Rec. 1888], but in this monograph of Danielssen’s 
they are more fully described and beautifully illustrated. 
New family Thelaceridj:. 
Mitchell (69). This family belongs to the Corallimorphidai, and is 
defined as follows : — 
Hexactinice without a sphincter, cinclides, or acontia, with numerous 
accessory rudimentary tentacles, so that more than one tentacle com- 
municates with a radial chamber, with the normal tentacles covered by 
small, compound, hollow protuberances. The accessory tentacle rudi- 
mentary. * Thelaceros rhizophorce , n. g. & sp., North Celebes, shallow 
water. 
Antheams (?). 
/ Iloplophoria , n. g., Wilson (94). This anemone is distinguished by the 
presence of four large, conspicuous, finger-like organs just below the circlet 
of tentacles, provided with battorios of nematocysts. They are diverti- 
cula of the spaces included between mesenteries of the second order. 
They are probably homologous with the marginal sacs of Actinia mesem- 
bryanthemum. Further characters are, that six pairs of mesenteries are 
complete and only four of them bear generative organs. H. coralligens , 
found in a hole half-inch deep, in a piece of Asteroid coral, on fringing 
reef of the Bahamas. 
X 
