69 
(Turban Urchin).— Case 17, those of Echino- room ix. 
corys (Helmet Urchin).— Case 18, those of Nat. Hist. 
Echinopilium (Cap Urchin). —Case 19 con¬ 
tains the species of Echinonaus (Boat Urchin), 
Echinobrissus (Brissus Urchin), and Echino- 
discus (Quoit Urchin).— Case 20, those of 
Echinanthus (Flower Urchin), and Echin- 
amygdalus (Almond Urchin). —Case 21, those 
of Echinospatagus (Spatangus Urchin). 
Cases 22 and 23 contain the various genera 
of the zoophytes commonly called Encrinites*, 
&c. 
In Cases 24 to 29 are deposited the tubulated 
cellular, and corticated Polypes. Of the tubulated 
polypes (Case 26) the principal genera are Tu- 
bipora and Polystomus (formerly Tubip ser¬ 
pens ).—Among the cellular (Cases 26, 27 ) are 
the genera Cellepora, together with Lunuli- 
tes, Orbulites, &c.—The remaining cases con¬ 
tain the various genera of that section of the 
corticated polypes which comprises the Madre¬ 
pores, such as Cyclolites, Aspidiscus, Turbi- 
nolia, Fungia, Caryophyll,ea, Madrepora, 
Astra:a, Hydnophora, with some other unde¬ 
scribed genera. 
* For the illustration of the fossil pentacrini, a fine specimen of the 
recent species (Pentacrinus Asterias), is deposited under a bell glass 
in the S.W. corner of this room. The vertebrae of a similar fossil 
species being known by the appellation of Asterias or Star-stone, 
Linnaeus derived from it the specific name of the recent species, 
which, however, he erroneously referred to the genus Isis. 
In 
