61 
Table 14. Pecten continued; and the ge- room viu. 
nera Plicatula, and Spondylus or hinged Oyster. Nat. hist. 
Table 15. Ostracea, including the genera, 
Gryphaea (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 Bra- 
chiopoda. 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; Hyalseana—which includes the 
genus Hyalaea, and another genus allied to the 
Hyalaea, named by Dr. Leach, Pontica. 
Order 2. Gasteropoda. The families Phyl- 
lidiana, and Semi-Phyliidiana, 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, Laply- 
1 siana and Limacina, the four remaining fami- 
| lies of the Gasteropoda. The genera of the Ca- 
I lvptracea are, Parmophorus, or Thracian shield 
shell. 
