﻿BELLINURUS BELLULUS. 239 



Species 2.— BELLINURUS BELLULUS, Konig, 1820. PL XXXI, figs, 3, a, b 



{not fig. 3, c). 



Bellinurus bellulus, Konig, 1820. Icones Foss. Sect., pi. xviii, fig. 230. 



— — Baily, 1863. Ann. and Mag. Nat. Hist., 3rd series, vol. xi, 



p. 112. 



— — H. Woodw., 1872. Geol. Mag., vol. xi, p. 439. 

 Entomolithus (Monoculus) lunatus, Martin, 1809. Pet. Derb., pi. xlv, fig. 4. 



— — — Parkinson, 1811. Org. Rem., vol. iii, pi. xvii, 



fig. 18. 

 Ltmulus trilobitoides, Buckl., 1836. Bridgew. Treat., pi. 46", fig. 3. 



— — Prestwich, 1840. Geol. Trans., 2nd ser., vol. v, pi. xli, 



fig. 8. 



— — 1 Portl., 1843. Rep. Geol. Londonderry, pi. xxiv, fig. 11. 

 Bellinurus — H. Woodw. Trans. Glasgow Geol. Soc, 1866, vol. ii, pi. iii, 



fig. 10. 



There is little to add to the generic description, already given, of this interesting little 

 King-crab, the first which was discovered in the "pennystone " ironstone nodules of 

 the Coal-measures at Dudley and Coalbrook Dale, Shropshire. 



The figures in Martin's ' Petrificata Derbiensia ' and in Bucldand's ' Bridgewater 

 Treatise ' convey the impression that the eyes are situated just within the arched front 

 of the glabella, but this is not the fact ; their true position is distinctly seen in fig. 3 a, 

 namely, on the raised lateral margin of the glabella, nearly midway between the front and 

 back of the head-shield. Fig. 3 b, is Konig's original specimen. 



B. bellulus approaches most nearly to Baily's species, B. regince (compare PL XXXI, 

 figs. 1 b, and 3 a), in the greater relative breadth of the cephalon as compared with its 

 depth, in the prominent thickened doublure of the front border of the head, in the 

 strong doubly arched glabella and the long lateral genal spines of the head-shield. 



The thoracic segments have a narrow central axis and are strongly trilobed. Each 

 segment terminates laterally in an acutely pointed and recurved spine. The five thoracic 

 segments appear to have been capable of flexure, the divisions or articuli of the axial as 

 well as the lateral portions of the thoracic somites being distinctly marked. 



The series of abdominal somites have their margins marked by sutures, but the axial 

 portion of these segments has coalesced. The axis is marked by a prominent tubercle 

 just anterior to the insertion of the caudal spine, which in this species is not quite so 

 long as the rest of the animal, whereas in B. regimes it is just three times the length of 

 the animal's body. 



The spine has a strongly marked ridge running down the centre. 



In 1866 I figured and described a small but very perfect specimen of this species 

 from the Coal-measures Kilmaurs, near Glasgow, in the ' Transactions of the Glasgow 

 Geological Society ' for that year (vol. ii, pi. iii, fig 10). The total length of this specimen 



