COfiCUy LIU— DITHYR J. 46. 215 



Chemnitz, vii. p. 331, tab. 66, fig. 633, 634. 

 Pecten Monotis. Da Costa, p. 151, tab. 10, fig. 1, 2, 4, 5, 7. 9. 

 Pecten subrufus. Lister, tab. 180, fig, 17, 181, fi^. 18. 



Shell nearly two inches long, and rather less in breadth, vary- 

 ing much in colors and markings : the ribs are clothed with 

 concave spinei more or less. 



Pecten testd oblongo-ovatd tsqiiivalm, striis 40 rotundatis Pusio. 



l/eviusculis, alternis minoribus: 

 Shell oblong-oval equivalve, with 40 rounded and nearly smooth 

 striae which are alternately smaller. 



Tab. nost. 1 7, fig. 2. 

 Ostrea Pusio. Linn. Syst. Nat. p. 1146. 



Gmelin, Syst. p. 3424. 

 /^*7/M)y«, Descript. Catal. p. 261. 

 Turton, Linn. Syst. iv. p. 266. 

 Palliolum. Chemnitz, vii. p. 333, tab. 67, fig. 635, 636. 



Pecten parvus, ex croceo rariegatus, tenuiter adraodum striatus, 

 alternis fere striis paulo minoribus. Lister, Conch, tab. 189, 

 fig. 23. 

 Mus. nost. From the rocks in Torbay. 



Shell five-eighths of an inch long, and half an inch broad, 

 brownish white with chocolate transverse zigzag bands, often 

 saffron or crimson, but variable in colors ; the under valve usually 

 clear white ; with about 40 fine rounded striae which are mostly 

 alternately larger and smaller, and very slightly muricate about 

 the margin. 



