58 MYAD^. 



While rakes arc free to desecrate tliy bed, 



And bear thcc off, — as foemcu take their sjjoil, — 



Far frum thy friends and family to roam ; 



Forced, like a Hessian, from thy native home, 

 To meet destruction in a foreign broil ! 



Tlioug'h thou art tender, yet thy humble bard 



Declares, O clam ! thy case is shocking hard." 



Jolin G. Saxe. 



Mya truncata. 



Shell oblong-oval, incquilatcn-al, rounded anteriorly, truncated posteriorly ; 

 widely gaping; tooth broader than long. 



Myatnmcata, Lin. Syst. Nat* 1112; Gmel. No. 1. — Fabr. Fauna Grfcnl. 404. — Pen- 

 nant, Brit. Zool. iv. pi. 41, fig. 14. — Cuk.mn. Couch, vi. 8, t. 1, figs. 1, 2. — 

 Montagu, Test. Brit. 32. — TnIaton and Rackett, Lin. Trans, viii. 35. — Wood, 

 Gen. Conch. 90, t. 17, figs. 1, 2; Ind. Test. pi. 2, fig. 1. — Dillwyn, Catal. i. 42; 

 Rcc. Sh. 42. — Deshayls, Encyc. Mcth. iii. 5'Jl, pi. 229, fig. 2. — Donovan, 

 Brit. Shells, iii. pi. 92. — Lam. Ah. sans Vert. 2d ed. vi. 73. — Tuiiton, Conch. 

 Diet. 97; Brit. Biv. 31.— -Lister, Couch, t. 428, fig. 269. — Gualt. Test, t. 91, 

 fig. D.— Brooke, Introd. pi. 1, fig, 10. -De Kay, Nat. Hist. New York, 240, 

 pi. 29, fig. 289. — Brown, 111. Conch. G. Br. pi. 10, fig. 2; 2d cd. pi. 4.5, fig. 2.— 

 PLvnley, Rec. Sh. pi. 2 (Mya), fig. 2; Ipsa Lin. Conch. 27. — Sowerby, Conch. 

 Man. fig. 71. — Crouch, Intr. Conch, pi 3, figs. 6, 7. — Burrows, Llcm. pi. 4, 

 figs. i_ 2.— Forbes and Hanley, Br. Moll. i. 1G3, ph 10, figs. 1, 2, 3, pi. H. fig. 1 

 (anim.). — WooDW. Man. Moll. 317, fig. 220 (with anim.). — Lyell, Tr. Geol. 

 Soc. Lond. vi. 137, pi. IG, figs. .5, G (1841). — Middend. Beitr. z. Mai. Ross. iii. 

 69, pi. 19, figs. 13-15; Sibcrische llcisc (Moll.), lOG, pi. 25, figs. 11-14. — Chenu, 

 Elcra. 48, fig. 152. — Gray, Cat. Br. M. (Brit. Moll.) 68. — Loven, Ind Moll. 

 Scand. 49. — Moller, MolL Grocnl. 17. — Stimpson, Shells of New England, 24. 



Mija prkipus vel Mentula Marina Stelleri, Tilesius, Mem. dc I'Acad. dc St. retcrsb. viii. 

 295, t. 9. 



Mija Uddemknsis, Forbes, Hancock, Ann. and Mag. N. H xviii. 337 (1846) (fossil). 



Sphenia Swainsoni, Turt., Br. Biv. 37, pi. 19, fig. 2 (the fry). 



Shell ol)lono;, ineqiiipartite, longest and rounded before, narrower 

 and al)rnptly cut off, generally obliquely, Ijehiiid ; the valves are 

 strong, deeply concave and often unequal, luit sometimes the right 

 valve, and sometimes the left, is most prolonged ; surface irregu- 

 larly ridged along the lines of growth ; color dingy white, covered 

 with a thick, tough, yellowish, wrinkled ej)idcrmis, which folds over 

 the edges of the shell, and is greatly prolonged posteriorly, forming 

 a tube six or ciglit inches long, supplying in some measure the ap- 

 parent loss of ])rotection to the animal by the truncation of the 

 sliell. The truncated edges arc a little flaring, and the shell is 

 left wide open Itehind ; beaks moderately prominent, turning slightly 

 forwards ; teeth broader than long, projecting a little inwards ; inner 

 face smooth, and nearly flat ; outer face similar to that of M. 



