4-5 



L. ELI.IPTICA. Lam. 2. Turt. B.p. 65. MACTRA 

 LUTRARIA. Lin. 1126. D.p. 146. Cft. /. 240,1. 

 List. t. 415, /. 259. Don. 2. t. 58. Pen. 4. p. 195. 

 *. 65. / 3. Mm. p. 100. Lin. T. 6. *. 16. / 3, 4. 

 Dor. Cat. p. 32. . 5./. II. Turt C. D.p. 84. 

 L. VULGARIS. I' 1 , p. 464. Oblong, subequi valve, 

 marked only by the lines of growth and remote obsolete 

 ridges, longer anteriorly, rounded and slightly gaping 

 at both ends, yellowish white under a thin close cuticle. 

 2...3i. In sand, about low water mark. 



L. COMPRESSA. Lam. 4. andL. PIPERATA. Lam. 5. 

 MACTRA. P. Gmel. 3261. LISTERA. C. Turt. B. 

 p. 51. t. 5./. 1, 2. D.p. 142. Ch. f. 21. E. M. 

 t. 257. /. 4. MACT. COMPRESSA. Mon. p. 96. 

 TELLINA PLANA. Don. t. 64. /. 1. Da. C. p. 200. 

 t. 13. /. l.Bl. t. 77. /. 2. Rounded-triangular, 

 thin, compressed, yellowish white, finely but irregularly 

 striated transversely, semi-pellucid; beaks very small 

 and central ; a distinct lozenge edged with a raised 

 line ; a single tooth in one valve locking into a bifid in 

 the other, no lateral teeth. !...!}. Muddy shores. 



GENUS. MACTRA. 



Transverse, inequilateral, subtriffonal, sides slightly 

 gapiny; beaks prominent ; one primary compressed 



