Illustrations of British Sea- She I Is 



155 



-*-< Fig. 4. Psammobia tellinella. Smooth, not distinctly rayed. 

 Is more or less tinged with purple within and without. 



Fig; 5. Venus stviatula (= V. gallina). Colour variable, 

 usually whitish with chestnut-colour zigzag markings and 

 three rays. V. fasciata is usually marked with three or four 

 orange rays on a whitish ground ; V. ovata is rufus flesh 

 colour, rayed with numerous narrow ribs. 



Fig. 6. Tapes pullastva. Dull chalky white with angular 

 spots and zigzag markings of a livid brown. T. vivginea is 

 white, but often crowded with pinkish zigzag lines. 



Fig. 7. Mactva solida (= Spisula solida). Solid, glossy, 

 white under the ash-coloured epidermis. M. (Spisula) elliptica 

 is a closely allied species, but is smaller, less solid, and is 

 not grooved concentrically on the dorsal areas. M. {Spisula) 

 subtvuncata is whitish, whilst M. stultovuwi' (a very common 

 and variable species) is fawn colour^with narrow rays. 



Fig.. 8. Donax anatina (== D. vittatus). Lined lilac beneath 

 a glossy yellow epidermis. D. politus is "angularly mottled 

 with liver colour or rich brown, varying much in intensity 

 of hue. A single, rather broad, conspicuous ray runs from 

 the beaks." 



Fig. 9. Lucina spinif era. Uniformly dull white. L.bovealis 

 is larger, and the concentric striae do not become spinous. 



Fig. 10. Lucina flexuosa (— Cvyptodon flexuosa). Very thin, 

 almost pellucid, within and without a pure or bluish-white. 

 L. (Loripes) lacteus is opaque white, without sculpture and 

 without an external ligament. 



Fig. it. Nucula nucleus. White, covered with an oliva- 

 ceous epidermis. N. nitida has a shiny ash-coloured epider- 

 mis, and is often ornamented with dark grey linear rays. N. 

 tenuis is thin, fragile and smooth. 



Fig. 12. Thracia phaseolina (= T. fvagilis). Very thin, 

 brittle; snow-white with yellowish epidermis. 



Fig. 13. Syndosmya alba. Very thin and fragile, white. 

 S. pvismatica is very inequilateral, and much elongated and 

 compressed. 



