100 



MOLLUSCA. 



[CoNCHACEA. 



small primary tooth in each valve, and also two lateral teeth in 

 both valves ; sinus slightly heart-shaped at its superior extre- 

 mity ; colour pale yellowish-white. 



At first I was disposed to consider this the young of A. 

 crassa, but its want of a sinus, more regularly ovate form, the 

 shape of the pallial sinus, and large bifid tooth, induced me to 

 give it a new specific name. 



This shell was found at Newbigging, Northumberland, by 

 Walter Calverly Trevelyan, Esq., and is in the splendid cabinet 

 at Wallington, Northumberland. 



Genus 24 — Tellina — Linnaeus. 



Shell compressed, transverse, subequivalve, inequilateral; pos- 

 terior side usually rounded ; the anterior somewhat produced, 

 or beaked and angular; anterior ventral margin with an irregular 

 flexuosity ; generally with two cardinal teeth in each valve, but 

 only one in some instances ; usually two lateral teeth in both 

 valves, but sometimes only one, and for the most part, remote 

 from the primaries ; two distant muscular impressions ; pallial 

 impression with a very large sinus ; ligament external. 



1. Tellina depressa, pi. XL, f. 12. 



Tellina depressa, First Ed., pi. 16, f. 12; Maton and Rackett, 

 p. 51 ; Brown, Wernerian Mem., II, p. 507; Donovan, V, pi. 

 163; Turton, Biv., p. 104, pi. 8, f. 6 ; Tellina squalida, Mon- 

 tagu, p. 56 ; Fleming, p. 436 ; Bosempra squalida, Leach, 

 MSS., p. 7. 



Shell flat, thin, transversely oblong-ovate; with a sinus in one 

 valve, running from the umbones, and terminating on the basal 

 margin, on the cartilarge or beaked side, in the left valve, with 

 a corresponding elevation or ridge in the opposite valve ; car- 

 tilage side terminating below in an acute angle or beak; the 

 other side beautifully rounded ; umbones very small, nearly 

 central, and very slightly turned to one side ; colour pale or 

 rich orange-yellow, sometimes nearly white, and when perfectly 

 recent, are covered with a fine, thin, brownish epidermis ; 

 whole surface finely, but not regularly, striated concentrically ; 

 hinge with two primary teeth in one valve, and three in the 

 other, one of which is somewhat remote, laminated at the base, 

 and acute at the point; inside yellowish-white or orange-yellow; 

 margins plain, and sharp. 



This very handsome species is found at Poole and Wey- 

 mouth, Dorsetshire; Dublin Bay and Porlmarnock, Ireland. 



2. Tellina punicea, pi. XL, f. 13. 



Tellina punicea, First Ed., pi. 16, f. 13; Maton and Rackett, 

 p. 50; Turton, Biv., p. 100; Fleming, p. 435 ; Tellina laeta, 

 Montagu, p. 57 ; Tellina incequstriata, Donovan, IV, pi. 123; 

 Tellina fragilis, Pennant, IV, p. 86, pi. 47, f. 26. 



Shell moderately strong, transversely oblong-ovate, much 

 compressed, inequilateral ; umbones very small, hardly elevated 

 above the hinge line ; one side subacute near the base, and the 

 other well rounded ; surface glossy, pale yellow or skin-colour ; 

 with numerous, strong, regular, rather open, concentric stria; ; 

 hinge with three teeth, the outer one on the anterior side bifid, 

 the other exterior one broad, more remote, and placed some- 

 what transversely oblique, holding an intermediate character 

 between a primary and lateral tooth ; both valves with a very 

 remote lateral tooth; margins plain, and sharp; inside pale pink 

 or bluish-white. 



Found on the Dorsetshire coast, Portland, and at Guernsey; 

 and my late friend Sir Patrick Walker found it on the shore at 

 Leith. We met with dead shells with the valves united, by 

 dredging, off Holy Island. These are in the cabinet of Lady 

 Jardine. It may, however, be considered as a very rare British 

 shell. 



3. Tellina striata, pi. XL, f. 15. 



Tellina striata, First Ed., pi. 16, f. 15; Montagu, p. 60, pi. 

 27, f. 2; Maton and Rackett, p. 53; Turton, Biv., p. 106; 

 Fleming, p. 436. 



Shell subtriangularly subovate, thin, subpellucid ; glossy, of a 

 rosy or white-colour, darker towards the umbones, which are a 

 little produced, placed nearly central, and slightly inflected ; 

 surface with numerous, very fine, concentric stria? ; and by the 

 aid of a strong lens, nearly obsolete, exceedingly minute, longi- 

 tudinal streaks or striae are observable ; one side narrow, some- 

 what beaked, and obliquely subtruncated; the other beautifully 

 rounded ; cartilage slope with a slight indentation ; inside rosy, 

 particularly towards the umbonal region, and becoming paler 

 towards the margins ; hinge with two remote, strong, laminated 

 teeth. 



Found on the beach at Portland and Weymouth. Extremely 

 rare. 



4. Tellina lineata, pi. XL, f. 17. 



Tellina lineata, First Ed., pi. 16, f. 17; Turton, Conch. 

 Diet., p. 168, pi. 4, f. 16; lb., Biv., p. 99, pi. 7, f. 1 ; Fleming, 

 p. 435. 



Shell semitransparent, transversely oblong-ovate, slightly pro- 

 duced at one side, and rounded at the other ; umbones small, 

 not quite central, and very slightly, if at all, reflected ; surface 

 pale cream-white, with a pale red longitudinal stripe running 

 close to the side in each valve; with numerous, fine, very close, 

 regular, concentric striae, which are strongest towards the sides; 

 hinge with two cardinal teeth, one of them entire and the other 

 cleft, and a lateral, laminar one on each side, in one valve, and 

 a single, bifid, primary tooth in the other. 



Dredged by Dr. Turton in Teignmouth Bay. 



5. Tellina tenuis, pi. XL, f. 19. 



Tellina tenuis, First Ed., pi. 16, f. 19; Montagu, p. 59; 

 Donovan, I, pi. 19, three lower figures; Turton, Biv., p. 107 ; 

 Fleming, p. 436 ; Forbes, p. 46 ; Maton and Rackett, p. 52 ; 

 Leach, MSS., p. 7 ; Tellina carnaria, Pennant, IV, p. 89, pi. 

 49, f. 32, right hand figure. 



Shell transversely ovate, thin, much compressed, extremely 

 fragile, subpellucid, and extremely glossy ; umbones small, 

 nearly central, their inflection to one side being hardly per- 

 ceptible ; the cartilage side somewhat produced, the other 

 finely rounded; whole surface covered with extremely fine, 

 somewhat irregular, concentric stria; ; colour varying from 

 pale skin-colour, white, citron-yellow, to carnations in almost 

 all shades ; sometimes plain, but for the most part with con- 

 centric zones, of lighter or darker shades of the prevailing 

 colour of the shell ; hinge with two primary teeth in each 

 valve, one of them with a slight lateral tooth ; inside glossy, 

 and generally of the same hue as the external surface, but 

 paler. 



This very beautiful shell is common on all the sandy shores 

 of Britain and Ireland. 



