PLATE XXX. 



These specimens are all from the Lower Carboniferous Series near Eccup, Yorkshire, and are in 

 the Museum of the Yorkshire College at Leeds.* 



Fig. 1. — Dithyrocaris insignis, sp. nov. The inside aspect of a part of a 

 right valve, or impress of its outside. (The uppermost of the two specimens on 

 the slab of shale.) Nat. size. Yorkshire College Museum, Leeds. No. 33a. 

 (Page 161.) 



Fig. 2 a. — The outer aspect of an imperfect left valve. (On the same slab as 

 fig. 1.) Nat. size. (Page 161.) 



Fig. 2 b. — Part of the dorsal ridge of fig. 2 a, taken at a little above the middle. 

 X 5. (Page 161.) 



Fig. 3 a. — Dithyrocaris insignis, sp. nov. A nearly perfect carapace. Nat. size. 

 Yorkshire Coll. Mus., No. 44 a; counterpart of No. 44 b. (Page 161.) 



Fig. 3 b. — Dithyrocaris insignis, sp. nov. The posterior termination of the 

 dorsal ridge. X 5. (Page 161.) 



Fig. 3 c. — Dithyrocaris insignis, sp. nov. Part of the ornament at the anterior 

 ventral region of the right valve. X 10. (Page 161.) 



Fig. 3 d. — Dithyrocaris insignis, sp. nov. Part of the ornament of the mid- 

 ventral region. X 50. (Page 161.) 



Fig. 3 e. — Dithyrocaris insignis, sp. nov. Part of the ornament of the postero- 

 ventral region. X 10. (Page 161.) 



Fig. 4 a. — Dithyrocaris insignis, sp. nov. An imperfect carapace of a small 

 individual. Nat. size. Yorkshire Coll. Mus., Leeds, No. 39 b. (Page 161.) 



Fig. 4&. — Dithyrocaris insignis, sp. nov. Part of the ornament of Fig. 4 a 

 on the ventral region just within the marginal fringe. X 15. (Page 161.) 



* The ultimate disposition of these interesting specimens from the Lower Carboniferous strata at 

 Eccup is not yet known. Some may be deposited in the Yorkshire College at Leeds, and others in 

 the British Museum and the Museum of Practical Geology. 



Some that were collected by Prof. P. F. Kendall, F.G.S., referred to in PI. XXV, figs. 1 — 5, page 

 159, have been presented to the British Museum (Natural History), Cromwell Road. 



