EURYPTERUS MAMMATUS. 163 



the same intercalated plate between the ultimate and penultimate joints, and also the 

 minute terminal palette at the end of the seventh segment. 



Numerous detached endognathary palpi occur associated with this form, furnished 

 with short recurved spines (Fig. 53, 2) arranged in pairs upon each segment, doubtless 

 referable to the same species. I have proposed to name this form Eurypterus Brodiei, 

 after its discoverer. 1 



Formation. — Passage-beds from the Uppermost Silurian to the Old Red Sandstone. 



Locality. — Purton, near Stoke Edith, Herefordshire. 



BAD AND DOUBTFUL SPECIES. 



* 

 * 



i* The following species have been somewhat doubtfully referred by Mr. J. W. 

 Salter to Eurypterus, but I think sufficient evidence is given below to prove that a portion, 

 at least, of the remains referred by him to Eurypterus ? mammatus are really plant-remains, 

 and that the remainder must, for the present, be classed with M. Jordan's Arthropleura 

 armata, from the Coal-measures of Saarbruck, Rhenish Prussia, a very anomalous 

 Crustacean, but certainly not a Eurypterus. 



Eurypterus ferox, I think, may with propriety be referred to the Myriapoda under 

 Messrs. Meek and Worthen's genus Euphoberia (see below, p. 171). 



" EURYPTERUS? MAMMATUS "— Salter. PI. XXIV, figs. 2— 0. 



Evryptervs (arthropleura?) mammatus, Salter. Quart. Journ. Geol. Soc, 1863, vol. xix, 



p. 85, figs. 1 — 7. 



This species was determined by Mr. J. W. Salter in 1863, from fragments referred by 

 him to the head (PI. XXIV, figs. 2 and 3), to the lateral portions of the body-segments, 

 and parts nearer to the tail ; but of the central surface of the carapace, of the eyes, or of the 

 appendages, nothing is known. 



The first fragment was discovered by Mr. Gibbs, the intelligent Collector of the 

 Geological Survey, in splitting up the shales at the mine-top, Pendleton Colliery, Man- 

 chester. Other specimens 2 were afterwards obtained by Messrs. Gibbs and Rhind, 



1 See 'British Association Reports,' Liverpool, 1870, p. 91. 



2 The specimens drawn on PI. XXIV, figs. 2, 3, 4, 5, and 6, and preserved in the Museum of Practical 

 Geology, Jermyn Street, are all which have been met with of this species. From the account given by 

 Mr. Salter, one would have expected a larger series of fragments. 



