126 



/. 5. Ch.f. 687. CRIOPUS ANOMALUS. F. p. 377. 

 Suborbicular, posteriorly retuse ; posterior scars 

 rounded, anterior uniting into one ; beak acute ; disc 

 sinuated; margin anteriorly irregular and thickened, 

 i. Zetland, on submarine stones. 



TRIBE BRACHIOPODA. 



Shell bivalve, affixed to marine substances by contact 

 or a tendinous cord. 



GENUS.- -TEREBRATULA. 



Oval, inequivalve, fixed by a tendinous pedicle ; the 

 upper valve with the beak produced and perforated 

 or emarginate ; under valve with two elongated 

 . projections issuing from the internal disc, which are 

 sometimes variously branched; hinge with two teeth; 

 ligament internal. 



T. CRANIUM. Mont, in Lin. T. 11. p. 188.*. 13. 

 /. 2. F. p. 368. Turt. B. p. 236. ANOMIA C. 

 Turt.D.p.6. T. VITREA. Flem. in Edinb. Ency. 

 7. p. 96. t. 206. /. 2. Oval, ventricose, senntrans- 

 parent, thin, brittle, finely shagreened and slightly 

 wrinkled concentrically, under a dull white skin milk 

 white, ventral edge slightly truncated ; the internal pro- 

 jecting processes of the under valve with a lateral 

 ramification issuing from the base on one side. I. 

 Zetland, rare. 



