280 MALACOZOA. TROPIOFODA. LAMELLIBRANCHIATA. 



2. Tellina crdssa. Thick Tellhia. 



Shell ovato-orbicular, compressed, rather thick, strong, 

 semitransparent, with numerous close concentric, convex, 

 ridgelets, and very minute radiating striulae ; yellowish-white, 

 with longitudinal pink rays, or plain ; the inside glossy, faintly 

 streaked toward the margin ; the siphonal impression very 

 large and oval ; one valve more convex than the other, each 

 with two teeth ; the umbones considerably behind the middle, 

 the frontal slope convex, the dorsal slightly convex, both ends 

 rounded. Length an inch and eight-twelfths, height an inch 

 and three-twelfths. 



A single valve found by Mr. Alexander Murray, at Fraser- 

 burgh, in October, 1S42; an entire shell, by Mr. Fergusson, 

 at the Cove, in January 1843. 



Tellina crassa. Perm. Brit. Zool. iv. 87. PI. 48. f. 58.— Tellina 

 fausta. Mont. Test. Brit. 64. — Tellina crassa. Mont. Test. Brit. 

 65. — Tellina crassa. Lamk. Syst. v. 529. — Tellina crassa. Turr. 

 Brit. Biv. 109. PI. 7. f. 2.— Tellina crassa. Flem. Brit. Auim. 436. 



3. Tellina tenuis. Thin-shelled Tellina. 



Shell ovate, compressed, very thin, white tinged with pink ; 

 both valves a little bent behind, glossy, with concentric striae, 

 the right a little more convex anteriorly ; the umbones behind 

 the middle, the frontal slope convex, the dorsal descending, 

 somewhat angular ; two small cardinal teeth in each valve. 

 Length an inch and two-twelfths, height nine-twelfths. 



The colour varies considerably, some being yellowish-white, 

 others tinged with pink, and having the interior yellow. 



Common along the sandy shores ; often cast on the beach ; 

 frequently brought up by the fishing-lines. 



Tellina planata. Penn. Brit. Zool. iv. 87. PI. 48. f. 29.— Tellina 

 tenuis. Mont. Test. Brit. 59. — Tellina tenuis. Turt. Brit. Biv. 107. 

 — Tellina tenuis. Flem. Brit. Anim. 436. — Tellina tenuis. Lamk. 

 Syst. v. 526; Ed. 2. vi. 197. 



4. Tellina Fdbula. Streaked-shelled Tellina. 



Shell subovato-oblong, narrowed behind, compressed, very 

 thin, yellowish-white ; both valves a little bent behind toward 

 the right, the left being convex, the right concave at that part ; 

 the right valve obliquely striate, and more convex anteriorly, 

 the left smooth and glossy ; a single cardinal tooth in one valve, 

 two in the other. Length eleven-twelfths of an inch, breadth 

 seven-twelfths. 



