Dr. H. Woodward—On Arthropoda of Coal-measures 541 
or boundary of the segments can be distinctly traced across the body, 
being terminated on either margin by a stout falcate spine 2mm. in 
length and backwardly curved. 
The telson or tail-spine is fairly stout, it is 9mm. in length, and is 
strongly ridged down the centre. 
This little king-crab approaches the forms described by Mr. W. H. 
Baily in 1863 from the Coal-measures, Queen’s County, Ireland} 
(Ann. Mag. Nat. Hist., ser. 111, vol. xi, p. 107, pl. v, fig. 1), but 
the carapace is more rounded and the genal spines are less sharply 
bent outwards away from the body; the opisthosoma is also less 
angular, and there are no tubercles on the median line of the body- 
segments; the marginal spines also in B. Baldwini are shorter, stouter, 
and stronger than in Mr. Baily’s specimens. This is true also of the 
species B. bellulus, Konig, from Dudley, etc.” 
In September last I named a new species of Pygocephalus from 
Sparth in honour of its discoverer, Mr. William Albert Parker, F.G.S., 
of Rochdale, one of the most enthusiastic of workers at the Sparth 
Beds. To-day I dedicate this Limulus to Mr. Walter Baldwin, who has 
described as well as assisted in finding many beautiful specimens from 
this locality. 
Fig. 2.—Bellinurus longicaudatus, H. Woodw., sp. noy. Nat. size. Coal- 
measures: Sparth, near Rochdale. Presented by Mr. W. H. Sutcliffe, 
F.G.S., to the Geological Department of the British Museum (Natural 
History), Cromwell Road. 
2. BELLINURUS LONGICAUDATUS, sp. Nov. 
The king-crab (Fig. 2) to which I desire to call attention presents 
some points of unusual interest. It is enclosed in a rather large 
1 H. Woodward, Brit. Foss. Crust., Merostomata: Pal. Soc. Mon., part v (1878), 
pl. xxxi, figs. 1, 2. — 
2 Op. cit., pl. xxxi, figs. 3, 3a. 
