69 
The genera belonging to the class Polypiaria are 
distributed as follows:— 
Table Case No. 9, contains the genera, Alveolites— 
Frondipora—Lichenopora—Polytrema— Orbitolites —- 
Marginopora — Distichopora — Hornera —Idmonea — 
Cricopora— Obelia — Tubulipora — Myriapora Es- 
chara—Adeone—Mesenteripora—Retepora — Ovulites 
— Cellepora — Berenicea—Discopora—Membranipora, 
and Lunulites. 
No. 10. Electra — Flustra — Elzerina— Pherusa*— 
Cellaria—Canda— Caberea —Tricellaria—Acbamarchis 
—Bicellaria— Crisia —Gemiceilaria— Uniceliaria —Ca- 
tenicella—Menipasa — Alecto — Anguinaria — Tibiana 
Neomeris —T ubularia—Coryna—Canipanularia —Lao- 
medca—Seriolaria—Plumularia, and Sertularia. 
No. 11. Biseriaria— Idia —Dynamena—Tuliparia—- 
Antennularia—Cymodocea—Salacia—Thoa— Entola - 
phora — Gristatella — Plumatella — Alcyonella. 
The true Zoophytes, are so called from the general 
resemblance which their corals bear to plants: some of 
them form a horny, and others a calcareous coral. 
They form the class Zoophytaria of de Blainville, and 
are contained in the Table Cases, Nos. 11—16. 
No. 11 (continued), Cuscutaria— Telesto—Cornularia 
— Clavularia—TubipoYa —Corallium—Isis, and part of 
Melitoea. 
No. 12. Melitoea, and part of Gorgonia, 
No. IS. Gorgonia. 
No. 14. Gorgonia—Eunicea, and Funiculina. 
No. 15. Plexaura—Muricea, and Antipathes. 
No. 16. Antipathes—Cirrhipathes — Hyalonemaf, 
* The Museum does not possess specimens of the genera printed 
in italics. 
| The axis of this extraordinary production, which Mr. Gray has 
named Hyalonema , or Glass Rope , is formed of numerous transparent 
siliceous fibres, slightly twisted together so as to look like a rope of 
spun glass; the fibres appear to be somewhat similar to the cal¬ 
careous spicula of the Pennaiula. These corals are found with their 
tapering base inserted in a sponge, on the coast of Japan. No 
animal, hitherto discovered, except the inhabitant of this curious and 
beautiful substance, is known to secrete pure silica. 
ROOM XI 
Nat. Hist. 
(Gray) 
