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, Sic. —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^a, Madrepora, 
AsTRiEA, HyOnophora, with some other unde¬ 
scribed genera. 
* For the illustration of the fossil peutacrini, a fine specimen of the 
recent species (Pentacrinus Astenas) 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 
