172 



BRITISH FOSSIL CRUSTACEA. 



Among others is a specimen " from Coalbrook Dale, which has very much the appear- 

 ance of some large Caterpillar, furnished with rows of tubercles, to which setae or bristles 

 were attached, as in the case of the Caterpillar of our common English Emperor Moth 

 [Saturnia Pavonia minor): unfortunately the specimen is imperfect at each end, and therefore 

 it is impossible to judge of the appendages of the head or tail. It will be seen that there 

 appear to be distensions of the membrane connecting several of the segments of the body 

 together, as between the first and second, second and third, fourth and fifth (on the 

 right hand side), and seventh and eighth. Now this could not, I think, occur to so 

 visible an extent in a Lepidopterous larva, because it seems to intimate that the broader 

 parts of the body (or the true segments) are of a firmer texture than the connecting 

 distendable membrane. The lateral series of long, slender, and evidently articulated 

 appendages seem also to throw a doubt on the Insect being a Lepidopterous larva. 



Fig. 62. — Euphoberia Imajor, M.& W., Coal-measures,Grundy 

 Co., Illinois, U.S.A. See Messrs. Meek and Worthen's 

 ' Palaeontology of Illinois,' 1868, vol. iii, p. 558. One 

 dorsal spine (*) still remains in situ ; the nodes (») are 

 evidently the bases of spine. Several pairs of the legs 

 are seen below. 



Fig. 63. — Arthropleura ferox, Salter, specimen figured 

 by the Rev. P. B. Brodie, preserved in the Hope 

 Collection, Oxford, from the Coal-measures, Coal- 

 brookdale. [Copied from Plate I, fig. 11, of 

 Brodie's ' Fossil Insects.'] 



These appendages have some remote analogy to those of a portion of the segments of 

 Squilla, but this is only in appearance, and not a real relationship. The dark line which 

 runs down the back seems quite analogous to the great dorsal vessel or heart of the 

 Caterpillars. (" Introductory Observations," by J. 0. Westwood^M.A., F.L.S., &c, &c). 

 See Woodcut, Eig. 63. 



Among the numerous interesting remains of Arthropoda from the Coal-measures of 

 Illinois, figured and described by Messrs. F. B. Meek and A. H. Worthen, in the 

 Palaeontology of Illinois, published in vol. iii of the publications of the Geological 

 Survey of Illinois (1868), is a specimen which there can be little doubt is identical with 



1 In Brodie's 'Fossil Insects of the Secondary Rocks,' p. xviii. 



