16 TRILOBITES OF GIRVAN. 



J. pecten, and in the presence of only three pairs of pleural points, a great approach 

 is made to the condition in B. colhii, B. laterisjpinifer arid other species. 



Genus TELEPHUS, Barrande. 

 Telephus salteri, sp. nov. Plate II, fig. 11. 



Specific Characters. — Head transversely elliptical. Glabella sub-cylindrical, 

 slightly expanded at front end and projecting a little beyond cheeks, abruptly 

 truncate, moderately convex, more than twice as long as wide at base ; surface 

 coarsely tuberculated. Axial furrows parallel for three-fourths length of glabella, 

 diverging slightly at front end. Meso-occipital furrow distinct, marking off 

 rounded smooth depressed meso-occipital ring, widest in middle. Cheeks 

 rounded, nearly semi-elliptical, widest l)ehind middle, rather wider than glabella, 

 gently convex, wdth rather broad smooth flattened border extending round them and 

 ending against glabella in front and at meso-occipital ring behind ; marginal furrow 

 strong; surface of cheeks granulated and with a few coarse tubercles on outer half. 

 Dimensions. — 



Length of head-shield .... 3*6 mm. 



„ of glabella .... 2"8 „ 



Width of head near base . . . . 5*4 ,, 



,, of glabella at base . . . . 1*5 „ 



,, of cheek (maximum) . . . 2*1 ,, 



BemarJes. — There is only one specimen of this curious little trilobite available, 

 but with the exception of the front end of the glabella it is well preserved. It 

 is uncertain if a pair of anterior spines is present as in T. hicuspis,^ ^^g-> which 

 it much resembles, though the cheeks in ours are relatively broader and more semi- 

 elliptical and the glabella more cylindrical, and the neck-ring smooth and pro- 

 jecting behind the cheeks. It is quite distinct from 2\ fractus, Barr., which the 

 author has described from the Whitehouse Group. ^ Wiman^ has lately recorded 

 this genus in the Baltic region. 



Horizon and Localitij. — Balclatcliie Group (Llandeilo) : Balclatchie. 



Family Asaphid.e. 

 Genus ASAPHUS, Brongniart. 

 Asaphus (Isotelus) grayae, sp. nov. Plate III, figs. 1 — 6. 



? 1904. Asaphus (Isotelus) gigas, De Kay, Eeed, op. cit., pt. ii, p. 45, pi. vii, fig. 1. 



^ Angelin, ' Palaeont. Scand.,' p. 91, pi. xli, fig. 22. 



2 Reed, op. cit., p. 44, pi. iv, fig. 11. 



3 Wimau, ' Bull. Geol. lustit. Upsala,' vol. viii (1907), p. 99. 



