62 
ROOM viii. (fossil) and Pecten, or Scallop shell. The Lima 
Nat. hist, and Pecten were considered as Ostrea, by Lin- 
neus. 
(Table 14.) Pecten continued; and the 
genera Plicatula, and Spondylus or hinged Oys¬ 
ter. 
(Table 15.) Ostracea, including the genera, 
Gryphsea (only one recent species of this genus, 
G. angulata is known) ; Ostrea, Vulsella, and 
Placuna. 
(Table 16.) Anomia, the last genus of 
the Ostracea. Also the families Rudista, and 
Brachiopoda. In the first, are the fossil genera 
Radiolites, and Calceola, and the recent genus 
Crania ; in the latter the genera Orbicula, Tere- 
bratula, (Anomia of Linneus) and Lingula. Of 
this genus, which is the last of the Conchifera, 
only one species, L. anatina, (Patella unguis. 
Lin.) is known. 
Mollusca. Class 12. Order 1. Pteropoda. 
This compartment also contains one family of 
this Order; Hyalaeana—which includes the 
genus Hyalsea, and another genus allied to the 
Hyalgea, named by Dr. Leach, Pontica. 
Order 2. Gasteropoda. The families Phyl- 
lidiana, and Semi-Phyllidiana, of the second 
order, are likewise in this compartment. In the 
first are the genera Chitonellus, Chiton, or Coat 
of Mail shell, and Patella, or the limpet. In the 
second, the genus Umbrella. 
(Table 17) Calyptracea, Bullaeana, Lap- 
lysiana 
