PLATE XXI 
XII. XITI. 
CRETACEOUS TEREBRATUL.«. Figs. I. to XI. 
I. II. III. T. Moutoniaiia, />'0/ 6.— English .specimens, Slianklin. 
IV. T. Mdutoniana, 7>' Ocft — French specimen. 
V. VI. VII. T. depressa, Lnm. — .Slianklin. 
VIII. IX. T. Celtica, Morn*.- Variety, Slianklin. 
X. T. Celtica, .Vorcw. — Shanklin. 
XI. T. tamarindus, Sotr. — Shanklin. 
PACHYRHIZODUS GLYPHODUS, n.s., Blalce and Ivlackie. Figs. XII., XIII. 
