436 MOLI.USCA. DONACIDiE. Tellina. 



Length half an inch, breadth a little more, with two red spots under the 

 beaks, or with interrupted sagittate rays. 



485. T. squalida. — Oval-oblong; produced and pointed re- 

 trally ; in one valve two teeth, and a single lateral one ; in the 

 other a single tooth and two lateral ones. 



Pult. Dorset. 29 Mont. Test. Brit. 5G.— T. depressa. Dm. Brit. Shells, 



t. clxiii. — Turt. Biv. Brit. 105 — English and Irish coasts. 

 Length about an inch, breadth nearly two inches ; colour reddish ; concen> 

 trically striated, with irregular ridges of growth. 



** With two teeth in each valve, and the shell oval. 



486. T. striata. — Oval-triangular, with crowded transverse 

 striae, and minute longitudinal ones ; each valve with two lateral 

 teeth. 



Mmd. Test. Brit. 60. t. xxvii. f. 2.— Turt. Biv. Brit. 106 — Southern 

 shores of England, rare. 

 Length an inch, breadth three quarters ; rosy-white, with fine and regular 

 concentric strife. 



487. T. tenuis. — Oval-triangular ; irregularly striate trans- 

 versely ; one of the valves with a lateral tooth. 



T. levis, List. Conch, t. ccccv. f. 251 — T. planata, Penn. Brit. Zool. iv. 

 87. t. slviii. f. 29 — T. tenuis, Don. Brit. Shells, t. xix. f. 2 — Mont. Test. 



Brit, lix Turt. Biv- Brit. 107 Sandy shores, common. 



Length about half an inch, breadth three quarters ; reddish, Avith generally 

 deeper bands ; compressed, somewhat truncated, and angular at the 

 anal extremity. 



*** In each valve two teeth, and the shell somewhat orbicular. 



488. T. macidaia, — Suborbicular, and equivalve, with rough 

 transverse striae, and minute longitudinal ones, each valve \vith 

 two lateral teeth. 



Turt. Biv. Brit. 108 — Ban try Bay. 



Length an inch, breadth an inch and quarter ; whitish, with dark irregular 

 spots ; the interstices of the distinct concentric striae are longitudinally stria- 

 ted, which gives a roughness to the aspect of the shell. — Tliis is probably 

 identical with T. obtusa of Sowerby, Min. Conch, t. clxxix. f. 4, a reputed 

 crag fossil. 



489. T. crassa. — Suborbicular, unequivah e, nearly equilate- 

 ral, with transverse striae, and obscure longitudinal ones ; the 

 left valve with a remote lateral tooth on each side. 



Pectunculus planus, List. Conch, t. 299. — T. crassa, Penn. Brit. Zool. iv. 



87. t. xlviii. f. 28 T. proficua, Pult. Dorset. 29. Mont. Test. Brit, 



69. T. reticulata, Maton and Rackeit, Linn. Trans, viii. 54. t. i. f. 9. 

 T. fiiusta, Pult. Dorset. 29. Mont. Test. Brit. 64. Don. Brit. Shells, 

 t. xcviii. rigida, ib. t. ciii. — Southern shores of England and Ireland", 

 rare in Scotland. 

 Length from 1 to 2 inches, and a little more in breadth ; strong, semitrans- 

 parent, whitish, tinged with yeUow, or rayed longitudinally with pink ; left 



