TRIBE BRACHIOPODA. 321 



T. Lenticularis. Desk. Mag. Z. 1841, t. 4,1.— Sow. Th. 1, p. 300, 

 t. 72,/. 108, 9, 0. — Waldhetmia L. Gray, Brack, p. 58. Orbicular, 

 lentiform, smooth, dark red, subinequi valve, marginal line ascending 

 from the umbo, then nearly straight, and very slightly sinuated at 

 the ventral margin. Upper valve slightly acuminated and recurved 

 dorsally ; perforation small, complete ; cardinal area flattened, angular 

 on the sides ; deltidia rather large, flat, united. Lower valve circular, 

 the internal appendage consisting of a single mesial rib (one-third the 

 length of the shell) and two branches setting off from tho umbones. 

 2. New Zealand. 



T. Cranium. Mull. Z. D. Prod.— Mont, T. L. 11, p. 188, pi. 13,/. 2. 

 —Sow. Th. 1, p. 354, t. 70,/. 60, 1, 2.— Br. Mol. 2, p. 357, t. 57, /. 11. 

 — Anomia C. Gm. — T. Vitrea, Fl. — Waldheimia C. Gray, Brack, 

 p. 58. Ovate, subtruncated at the ventral mirgin, slightly acumi- 

 nated dorsally, gibbous, pale, somewhat diaphanous ; valves equally 

 convex ; margin flexuous, slightly sinuated at the broader extremity, 

 entire. Upper valve somewhat produced, slightly recurved and 

 obliquely truncated at its dorsal end ; perforation large, incomplete ; 

 cardinal area indistinct, rounded, its deltidia small, linear, separate. 

 Lower valve slightly flattened, and somewhat angular at the broader 

 extremity ; internal appendage large, two-thirds the length of the 

 valve, forming two lateral loops, one on each side, and then uniting 

 to form one very large upper loop. 1. N. Europe ; Britain, rarely. 



T. Septigera. Loven, Lid. Scand. 29. — Waldheimia S. Gray, 

 Brach.p. 59. — Davids. Ann. N. H. 1855, 1. 10, /. 1. Whitish, smooth, 

 subpellucid, tumid, ovate-trigonal, strongly beaked, slightly biplicated ; 

 ventral edge truncated, meeting the sides at obtuse angles ; perfora- 

 tion large, round ; deltidium connate ; smaller valve with a produced 

 raised median septum ; loop reflected, three- fourths as long as the 

 interior of the shell. If. N. Europe. 



T. Globosa. Lam. L—Bl. t. 52,/. 2.— Sow. Th. l,p. 359, t. 71, 

 /. 99 to 101. — Waldheimia G. Gray, Brach.p. 59. Ovate, ventri- 

 cose, subequivalve, whitish, very smooth, slightly trilobed ventrally ; 

 margin entire, straight, sinuated at the ventral portion. Upper 

 valve slightly acuminated dorsally, its vertex subreflected and trun- 

 cated ; perforation large, oblique, nearly complete ; cardinal area large, 

 rounded on the sides ; deltidia large, triangular, separate ; mesial 

 ridge broad, rounded, not very distinct. Lower valve rounded, slightly 

 lobed ventrally; internal appendage large, two-thirds the length of 

 the valve, and formed as in Californica. lf...l£. 



T. Picta.— Anomia P. Ch. ]], /. 2011, 2.— A. Cranium, var. 

 D.p. 295.— A. Rubra, W. S. t. 2, An.f. 4.— T. P. Sow. Th. 1, p. 351, 

 t. 70, /. 43, 4. — Waldheimia P. Gray, Brach. p. 59. Ovate, slightly 

 acuminated dorsally, thin, red with somewhat radiating white spots ; 



2 A 



