BOHEMILLA. 53 



of short deep oblique furrows, directed outwards, situated not far from posterior 

 margin and more than one third the width of the head apart. Eye large, vertical, 

 embracing side of head for three fourths its length. Palpebral lobe very narrow, 

 band-like. At base of eyes is small triangular area marked off by a furrow 

 which cuts basal angle of glabella and may represent occipital furrow. 



Thorax shorter than head, but about equal in length to pygidium, of six 

 segments (the Grirvan example is not adult and only possesses four) ; axis slightly 

 convex, broader than pleurae, tapering a little to pygidium. Axial farrows distinct. 

 PleuraB narrower than axis, somewhat bent down, furrowed, and successively 

 increasing in length towards pygidium. 



Pygidium semicircular, gently convex; axis convex, conical, of three segments, 

 less than half the length of pygidium (in adults the axis is reduced to a very short 

 unsegmented rudiment). Lateral lobes with two pairs of faintly marked radiating 

 grooves on anterior portion, but rest of surface smooth. No border present. 



Remarks.; — No adult example of the thorax is known from Girvan, and the eyes 

 are not preserved. But in all parts available for comparison there is complete 

 agreement with the Bohemian examples of the species. 



Collections. — Mrs. Gray (f. M.) ; Museum of Practical Geology; Edinburgh 

 Museum. 



Horizon and Locality. — "VVhitehouse Group (M. Bala) : Whitehouse Bay. 



Genus BOHEMILLA, Barrande. 

 1. Bohemilla (? = Cyclopyge), sp. Plate VIII, fig. 4 



Specific Characters. — Elongated oval in shape, truncated posteriorly; composed 

 of five segments (of which the first is the largest and the second, third and fifth 

 are subequal in width) and of one narrow neck [?] ring. Whole surface dotted 

 with small tubercles. 



The anterior or first segment is as wide as all the next three together, and 

 has a double row of small tubercles with a faint groove between them down the 

 centre. It is marked off posteriorly by a pair of almost straight furrows meeting 

 in the centre, where they are slightly bent back. The second segment is marked 

 off from the third by a single straight furrow extending right across. Down the 

 centre runs a deep median groove bordered on each side by a large low tubercle 

 of the same width as the ring. The third segment has a similar median groove 

 and lateral tubercles on it, but is marked off posteriorly by a pair of furrows arched 

 forwards and not meeting in the middle but with their inner ends curved round 

 and connected by a short shallow horizontal furrow. The fourth segment is 



