TRIBE BRACHTIOPODA. 319 
attached by the produced and pointed beak; hinge-area triangular, 
smooth; margins thickened and granulated internally ; ; brachial 
septum 3- lobed ; loop rudimentary, 4-lobed. ~,. Mediterranean. 
TEREBRATULA. 
Inequivalve, regular, attached by a pedicle or by the larger vatve, 
which latter has a more or less projecting perforated wnbo ; hinge with 
two teeth ; an internal skeleton. 
* Black ; surface not shagreened. 
T. Pstrracka.*—Anomta P. Gin. 3348, from A. rostrwm-psittact, 
Ch. f. 713.— D. p. 296.--W. t. 11, f. 27.—T. P. Lam. 12.— E. 
t. 244, f. 3.—Sow. G.—Reeve, C. S. t. 126, f. 5.— Sow. Th. 1, p. 842, 
Go hE yf. CORON SO: oe apne: Pi BriMol: 2; 92346, 1257, f1, 2)8. 
Subglobose, acuminated dorsally, thin, blackish; radiatingly 
striated, strongly sinuated at the ventral edge. Upper valve acute 
and recurved dorsally, deflected ventrally; central sulcus broad and 
indistinct ; cardinal area conspicuous, rounded, the deltidia narrow, 
uniting at the sides of the incomplete triangular perforation. Lower 
valve ventricose, broader at the ventral margin, where the central 
carination (elsewhere inconspicuous) becomes distinct: the two car- 
dinal teeth recurved, and projecting to either side of the shell. 
Inner margin quite entire. 1. N.Hurope; Labrador; Melville 
Island; very rarely in North Britain. 
T. Niericans. Sow. Th. 1, p. 342, t. 71, f. 81, 2.—RyncHoNELLA 
N. Davids. Z. P. 1852, t. 14, f. 80, 1. Rounded ventrally, pointed 
dorsally, wider than long, rather thin, blackish, with about 25 rounded 
radiating ribs; marginal line straightish. Upper valve somewhat 
triangular eal rather depressed ; rounded ventrally, sloping dorsally ; 
perforation large, square, not entire; cardinal area large, flattish, the 
sides rounded, “deltidia narrow, uniting at the sides of the aperture. 
Lower valve depressed, transversely ovate; cardinal teeth as in the 
last. Margin crenulated; apophysis consisting of 2 short curved 
lamella. goto N. ealan 
T. Grayit.— RuynconeLta G. Woodw. An. N. H. 1855, t. 10, 
f. 16. Light horn-coloured, dull, trigonal, depressed, rounded at 
the sides, truncated ventrally, smooth, but strongly plaited near the 
margin with 4 central plaits and 3 or 4 on each side, the furrows 
obscurely striated; margin smuated ventrally, and strongly toothed ; 
perforation minute, completely tubular. 3. Feejee Isles. 
