Vol. 55.] BEDDED EOCKS OE COTTNTT WATERFORD. 747^ 



form, and it has usually three pairs of furrows. R. Jentzschi, 

 PompeckjV appears also to be allied in many respects, but shows no 

 ornamentation. 



Eemopleurides Salteri, sp. nov. (PI. XLIX, figs. 1-3.) 



There is another form from Tramore in the Dublin and Cambridge 

 collections possessing a peculiarly shaped transverse glabella, which 

 shows several characteristic features. The glabella is transversely 

 oval, broadest at about one-third of its length from the neck-furrow, 

 and with rounded but well-marked lateral angles near the base, 

 round which the eyes bend sharply. In front it is produced into a 

 short narrow tongue of about one-fourth the maximum width of 

 the glabella. The band-like eyes embrace the sides of the glabella 

 and slightly indent its base, where they are nearly as wide as the 

 neck-ring. 



The surface of the glabella is marked by two pairs of short, 

 slightly curved, isolated furrows. The posterior pair is about half 

 way between the neck-furrow and anterior pair. In young speci- 

 mens both pairs are very faint. lu addition to these furrows the 

 glabella possesses a conspicuous ornamentation consisting of fine 

 wavy, rather irregular lines, particularly strong in young individuals, 

 and concentric to the margins, near which they are most distinct. 

 Abundant small tubercles are dispersed between them, and are a 

 characteristic feature. 



The neck-ring is rounded, short, and broadest in the middle, the 

 lateral angles being pointed, owing to the strong neck-furrow 

 curving backward at the sides. Tbe neck-ring is ornamented with 

 rather larger tubercles than those on the glabella, and they appear 

 to be generally arranged in four or five rows, the largest forming 

 the posterior marginal row. 



There is one specimen with seven body-rings attached to the head- 

 shield. These show a broad axis about three times the width of 

 the narrow pleurae, as in E. Colbii ; but the rate of tapering of the 

 axis is slower than in this species, the width of the axis of the first 

 body-ring being 3-5 mm., and that of the seventh being 2-5 mm. 

 The axial rings are covered with small tubercles and granulations, 

 the larger tubercles being arranged along the posterior edge. The 

 pleurae are short, falcate, curved backward, with a strong short 

 oblique furrow running back from the prominent fulcral tubercle 

 situated on the front border close to the axis. A corresponding 

 notch is found on the posterior border. The pygidium is unknown. 



This species seems allied to R. Portlocki, but the ornamentation 

 is very distinct. 



Measurements. I. II. 



mm. mm. 



Length of head -shield 6*0 4*0 



glabella 5*0 3-0 



Maximum width of glabella 7*0 5*0 



Width of glabella at the neck-furrow 2-25 2*0 



^ Beitr. zur Naturk. Preussens, * Die Trilobitenfauna d. ost- u. westi^reuss 

 diluv. Geschieb.' 1890, p. 87 & pi. i, figs. 31 a & 6. 



3c2 



