66 SOLEN. 



a curved rib, and a spoon-shaped tooth in each valve ; a de- 

 licate suture extends a little way longitudinally from the apex, 

 which Mr. Wood says often cracks. Ginelin's description of 

 his So/en Speng/eri appears to have been partly taken from 

 Spengler's badly executed figure of Mya anserifera ; and 

 from the description which Chemnitz has given of the speci- 

 men in Spengler's Museum, it appears to me to be at most 

 only a slight variety of this species. 



roseus. 21. Shell ovate-oblong-, smooth, flesh-co- 

 loured ; hinge with a somewhat bifid tooth in- 

 serted into a cavity in the opposite valve. 



Solen roseus. Gmelin, p. 3227. Wood's Conch, p. 133. 

 Soleu, No. 4. Schroeter Einl. ii. p. 624. 

 Chemnitz, vi. p. 69. t. 7. f. 55. 



Inhabits the Red Sea. Chemnitz. 



Shell about an inch long and twice as broad ; it is covered with 

 a green epidermis, and when this is removed, appears of a 

 pale rose colour on the out as well as inside ; it is said to re- 

 semble a Tellen, except in being open at both ends, and the 

 hinge is described with a somewhat bifid tooth, inserted into 

 a cavity in the opposite valve. 



striatus. 22. Shell oval, diaphanous, very brittle, 

 and finely striated transversely ; hinge with a 

 single tooth. 



Solen striatus. Gmelin, p. 3227. Wood's Conch, p. 134. 

 Solen, No. 6. Schroeter Einl. ii. p. 636. 

 Chemnitz, vi. p. 71. t. 7. f. 57 and 58. 



Inhabits the shores of the Nicobar Islands. Chemnitz. 



Shell about five-eighths of an inch long, and thirteen lines 

 broad, rose-coloured on both sides, with white rays diverg- 

 ing from the hinge to the margin. 



castrensis, 23. Shell oval, pellucid, very smooth, 

 and marked with triangular characters ; um- 

 bones prominent ; hinge with a single tooth. 



Solen castrensis. Chemnitz, xi. p. 201. t, 198. f. 1935 and 

 1936. Wood's Conch, p. 1 34. 

 Inhabits the coasts of Guinea. Chemnitz. 

 Shell about ten lines long, and an inch and a quarter broad, 



white, and singularly marked with short broken zic-zac pur- 



