PLATE XXIV. 



(All the figures are of the natural size). 



Fig. 1. — Dithijrdcaris tricornis, Scouler. Carapace and abdominal segments. 

 Mus. Geol. Surv. Scotl, F ff. No. 14 (Page 171.) 



Fig. 2. — D. Golei, Portlock. Carapace, imperfect. (The type.) Mus. Pract. 

 Geol. 6263, \^. (Page 165.) 



Fig. 3. — D. orbicidaris,FortloGk. Carapace, crushed. (The type.) M. P. G., 

 6266, ff. (Page 168.) 



Fig. 4.—D. Colei, Portlock. Right moiety or valve. M. P. G., 6262 (part). 

 (Overlapping fig. 1, PI. XXIII.) (Page 166.) 



Fig. 5 a. — D. tricornis, Scouler. Carapace of small individual. M. G. S. Sc, 

 F ^, No. 9. (Page 174.) 



Fig. 5 b. — The same. End view in outline. 



Fig. 6. — D. tricornis, Scouler. Folded and compressed carapace and tail. 

 (The type.) Mus. Tech. Coll. Glasgow. (Page 172.) 



Fig. 7. — D. testudinea, Scouler. Carapace, abdominal segments, and tail. 

 (The type.) Mus. Tech. Coll. Glasgow. (Page 146.) 



Fig. 8. — Chxnocarls tenuistriata , M'Coy, sp. Right valve. (The type.) 

 Copied from M'Coy's ' Carb. Fossils Ireland,' pi. xxiii, fig. 3. 



