PLATE VII. 



(All the figures are of the natural size except figs. 7 h,l d, 7 e, and 9 h.) 



Figs. 1 a, 1 b. — Ceratiocaris Salteriana, T. R. J. & H. W. The counterparts of 

 a squeezed carapace. Mus. Pract. Geol. (Page 55.) 



Fig. 2. — The same. A carapace. Cambridge Mus. (Page 55.) 



Fig. 3. — The same. A carapace, abdominal segments, and caudal appendages. 

 Oxford Mus. (Page 56.) 



Fig. 4. — Geratiocaris cassioides, T. R. J. & H. W. Carapace, abdomen, and 

 appendages. Ludlow Mus. (Page 60.) 



Fig. 5. — The same. Carapace, abdomen, and appendages. Oxford Mus. 

 (Page 61.) 



Fig. 6. — The same. Carapace, abdomen, and appendages. Mus. Pract. Geol. 

 (Page 60.) 



Figs. 7 a — 7 e. — Geratiocaris cassia, Salter. Counterparts of a small slab, each 

 having remains of two carapaces (neither quite perfect, and the lower one nar- 

 rowed by pressure) with abomen and appendages. 7 a, Ludlow Mus. ; 7 c, Mus. 

 Pract. Geol.; 7 6 (X 4 diam.), a piece of the ventral rim and striae fi*om 7a; 

 7 d and 7 e ( X 4 diam.), similar pieces projecting from the upper borders of the 

 carapaces ; 7 d, from upper specimen in fig. 7c; and 7 e, from the lower specimen. 

 (Page 58.) 



Fig. 8. — Physocaris vesica, Salter. 8 a, the specimen in Mr. Salway's collection 

 at Ludlow; 8 b, copied from the woodcut in the 'Ann. Mag. Nat. Hist.,' 1860. 

 In both cases the carapace is probably upside down. (Page 67.) (See also 

 the woodcut. Page 67.) 



Fig. 9. — Emvielezoe tenuistriata, T. R. J. & H. W. 9 a, carapace partly 

 embedded above and broken below ; 9 b, portion of the linear ornament (X 15 

 diam.), placed vertically instead of horizontally. Ludlow Mus. (Page 70.) 



Fig. 10. — Geratiocaris compta, T. R. J. & H. W. 10 a, remains of carapace, 

 abdomen, and appendages ; 10 b, part of abdomen and appendages, magnified 

 3 diameters. Ludlow Mus. (Page 57.) 



