CONCHACEA.] 



MOLLUSCA. 



101 



6. Tellina Fabula, pi. XL, f. 18. 



Tellina Fabula, First Ed., pi. 16, f. 18; Donovan, III, pi. 

 97; Montagu, p. Gl ; Turton, Biv., p. 101 ; Maton and Rackett, 

 p. 52; Fleming, p. 435; Leach, MSS., p. 7; Brown, Wernerian 

 Mem., II, p. 507. 



Shell transversely elongated, thin, pellucid, much compressed, 

 and flexuous ; anterior side narrowed and obliquely subtrun- 

 cated, opposite side well rounded ; umbones very small, nearly 

 central, with a slight inclination to the cartilage side ; colour 

 generally white or pale yellow, frequently with a deeper tinge 

 towards the umbones, and often exhibiting iridescent reflections; 

 the left valve with very fine, regular, longitudinally diagonal 

 striae, obliquing from the superior portion of the posterior side 

 towards the base ; the right valve quite plain, or with remote, 

 irregular, concentric, obsolete strise ; hinge with three teeth in 

 the left valve, one of which is lateral, but not very remote 

 from the cardinal ones ; the right valve with only two cardinal 

 teeth ; inside smooth, glossy, white, with generally a darker 

 tinge towards the hinge ; margins plain, and very sharp. 



This shell is liable to some variety, the diagonal striae in vari- 

 ous specimens only reaching a little more than half way along 

 the posterior side. 



Distinguished from T. tenuis, by its more lengthened and 

 more acute anterior side, and especially by the left valve being 

 diagonally striate. The two species are frequently found mixed 

 in cabinets. 



Inhabits many sandy bays in Britain and Ireland. 



7. Tellina similis, pi. XXXIX, f. 35. 



Tellina similis, Sowerby, Brit. Miseell., p. 29, pi. 75 ; Mon- 

 tagu, Sup., p. 167; Turton, Biv., p. 102; Fleming, p. 435. 



" Shell ovate, compressed ; both valves diagonally striated 

 five-sixths over the surface ; beak not curved." — Sowerby. 



Sowerby remarks that great similitude exists between this 

 shell and the T. Fabula, but differs in being rounded at the 

 narrower side, and destitute of the curvature, and in both valves 

 being diagonally striated. 



Found on the shores of Brighton, in company with Tellina 

 Fabula. 



8. Tellina elliptica, pi. XL, f. 20, 21. 



Tellina elliptica, First Ed., pi. 16, f. 20, 21 ; Tellina planata, 

 Pennant, IV, p. 87, pi. 48, f. 29. 



Shell elliptical, smooth, glossy, cream-white ; umbones small 

 and acute, placed much to one side, which is a little contracted, 

 the other ample and rounded ; hinge with three cardinal teeth 

 in each valve, but no lateral teeth ; inside smooth, white, and 

 glossy; margins plain, and sharp. Length a quarter of an inch; 

 breadth three-eighths. 



Found at Dunbar, by the late General Richard Bingham. 



9. Tellina pellucida, pi. XL, f. 22. 

 Tellina pellucida, First Ed., pi. 16, f. 22. 



Shell transversely oblong-ovate, very pellucid; umbones con- 

 siderably produced, placed much to one side, but not inflected ; 

 anterior side very short ; posterior side large, and elongated ; 

 colour bluish-white ; with numerous, very fine, concentric, 

 nearly obsolete stria; ; hinge with two primary teeth in each 

 valve, but destitute of lateral teeth. 



Found at Seaton, County of Durham, by W. C. Trevelyan, 

 Esq., and afterwards at Dunbar, by General Bingham. 

 2 c 



10. Tellina solidula, pi. XL, f. 14. 



Tellina solidula, First Ed., pi. 16, f. 14; Montagu, p. 63; 

 Maton and Rackett, p. 5S; Forbes, p. 46; Psammobia solidida, 

 Turton, p. 95, pi. 8, f. 2 ; Fleming, p. 438 ; Tellina carnaria, 

 Pennant, IV, p. 88, pi. 32, f. 32, left hand figure, and f. 32 a ; 

 Limecola solidida, Leach, MSS., p. 7. 



Shell strong, thick, convex, suborbicular; anterior side a little 

 produced into a subacute beak, on which side the line from the 

 umbo downwards is considerably more parallel than the other, 

 and with a wide, longitudinal depression ; posterior side well 

 rounded ; umbones placed nearly central, and rather blunted, 

 hardly turning to either side; exterior surface dull, of various 

 colours, yellowish-white, yellow, citron, flesh-colour, and rosy 

 red; some plain, others banded or zoned; hinge with two small 

 teeth in both valves; inside glossy, and of the same colours as 

 the exterior, but the tints in general more vivid. Sometimes 

 measures an inch in length ; and an inch and a quarter in 

 breadth. 



Inhabits most of the coasts of Britain and Ireland, and bur- 

 rows in sand four or five inches beneath the surface. 



11. Tellina Donacina, pi. XL, f. 16. 



Tellina Donacina, First Ed., pi. 16, f. 16; Montagu, p. 58, 

 pi. 27, f. 3 ; Maton and Rackett, p. 50, pi. 1, f . 7 ; Turton, p. 

 102, pi. 8, f. 4; Fleming, p. 435 ; Tellina trifasciata, Pennant, 

 IV, p. 88. 



Shell transversely oblong-ovate, thin, compressed, subpellucid ; 

 umbones very small, placed much to one side; one side sub- 

 truncated, short, and terminating in a short beak below ; the 

 opposite side much elongated, and rounded ; basal line nearly 

 parallel, or very slightly arcuated ; surface of a pale gamboge- 

 yellow, with numerous, fine, concentric stria?, beautifully radi- 

 ated, with interrupted rays of deep carnation ; and also with 

 transverse zones in many specimens ; hinge with two teeth in 

 one valve, that behind the umbo extending into a lateral lamina; 

 and a single tooth in the opposite valve ; inside smooth, glossy, 

 generally of a rich yellow, and frequently with radiations cor- 

 responding to those of the outside ; some specimens are nearly 

 white, with, however, almost invariably a roseate mark below 

 the umbones. General length about half an inch ; breadth 

 three-quarters. 



This is one of the most beautiful of our British bivalves, and 

 inhabits sandy shores. Salcomb Bay, Devon; Sandwich, Wey- 

 mouth ; Dublin Bay, Portmarnock, and Bantry Bay, Ireland ; 

 and the Friths of Forth and Clyde, Scotland. 



Genus 25 Psammobia Lamarck. 



Shell transverse, oblong, somewhat angular, gaping at each 

 extremity, and covered with a thin, horny epidermis; with two 

 short, bifid, cardinal teeth in the left valve, and one in the right 

 valve ; two distant, suborbicular, muscular impressions in both 

 valves, situate near each end of the valve ; pallial impressions 

 with a very largo sinus ; ligament external, and supported upon 

 a prominent fulcrum. 



1. Psammobia Ferroensis, pi. XL, f. 1, 2. 

 Psammobia Ferroensis, First Ed., pi. 16, f. 1, 2; Turton, 

 Biv., p. 94 ; Fleming, p. 438 ; Forbes, p. 55 ; Maton and 



