CONCHOLOGICiVL MANUAL. 



ABIDA. Leach, 1819. A genus founded on a species of Pupa, 

 wliicli has the peristome slightly reflected, and numerous plaits 

 in the aperture. Pupa Juniperi, Pupa secale, Braparnaud. 

 Grreat Britain ; also Central and Southern Europe, 



ABRA. Leach, 1817. Fam. Mactracea. A genus composed 

 of Amphidesma tenue, Lamarck, prismaticum, and other small 

 thin species. British Channel and Mediterranean, PI. xxiv. 

 f. 496. 



ABSIA. Leach. Lithoteta, Sowerby. Fam. Pedunculated Cir- 

 ripedes. 



ACAMAS. Montfort. Belemnites multiforatus, Blainville. A 

 species described as being perforated at the apex, by a stellated 

 perforation. JSTo species of Belemnite at present known agree- 

 ing with the description ; it is supposed to have been taken from 

 a broken specimen. 



ACANTHIZA. Fischer. Monoceras, Lamarck. 



ACANTHOCHETES. Leach, 1819. A name given to Chitonea, 

 having bunches of bristles at the sides of the valves. Ex. Ch. 

 fasciciilaris, PI. xxiv. fig. 506. 



ACANTHOPLEURA. G-uilding, 1835. A generic name given 

 to species of Chiton having bristles on the margin. Ex. Ch. 

 spinosus, f. 227. 



ACARDO. Lam, 1801. Umbrella. Lam. 1812, 



ACARDO. Commergon. Described from a pair of bony plates, 



, taken from the vertebrae of the "Whale, and mistaken for a bivalve 

 shell, destitute of a hinge. 



ACARDO. Swainson. See Aphrodite, Lea, C. Greenlandi- 

 cum, PI. vi. fig. 123*. 



