PECTEN. 553 



Sub-gen. chi.amys, Bolten. 



Shell sub-equivalve; valves radiately striated, or irregularly 

 ribbed. 



albolineatus, Sow. niadreporarum, Petit. 



bifrons, Lam. ornatus, Lam. 



cuueatus, Reeve. rubidus, Hinds. 



irregularis, Sow. striatus, Mull. 



Islandicus, Chem. teriuigranosus, Reeve. 



lsetus, Gould. vitreus, Chem. 



Sub-geu. pallium, Martini (Dentipecten, R'uppell. Decado- 

 pecten, Sow.). 



Shell equivalve ; valves longitudinally plicate. Hinge line 

 obscurely toothed. 



anthriticus, Reeve. pes-anatis, Reeve. 



digitatus, Hinds. plica, Linn. 



fasciculatus, Hinds. Strangei, Reeve. 



flabelloides, Reeve. subplicatus, Sow. 



flagellatus, Lam. velutinus, Sow. 



Sub-gen. pseudamussium, Klein. 



Shell fan-shaped, thin, sub-equivalve ; valves longitudinally 

 plicate, smooth or finely striated. 



argenteus, Reeve. tnollitus, Reeve. 



clavatus, Poli. nasans, Phil. 



corneus, Sow. Proteus, Soland. 



flexuosus, Poli. septemradiatus, Mull. 



glaber, Linn. similis, Lask. 



Groenlandicus, Soiv. squamosus, Gmel . 



hyalinus, Poli. stellatus, Reeve. 



hybridus, Gmel. sulcatus, Born. 



imbrifer, Lovcn. tigrinus, Mull. 



latiauratus, Conr. undulatus, Sow. 

 mirificus, Reeve. 



