Vol. 67.] FROM THE PABADOXIDES BEDS OF COMLEY. 287 



front by a distinct groove, but this is never so deep or wide as that 

 shown in Linnarsson's fig. 2 b. 



In the Comley form the axial furrow varies in the same manner 

 as the intramarginal furrow, but is never very strongly marked. 



The Test appears to be very thick and strong, and shows minute 

 granulations on the outer surface with interspaces, which in 

 places sink to little pits, too ill-defined to be called punctae. 

 The internal casts (figs. 12 & 13) show, upon the glabella and 

 proximate parts of the cheek, closely-set granulations indicating 

 depressions ou the interior of the shell ; towards the postero-lateral 

 angles these become successively coarser and, in front of the mark 

 corresponding to the ocular ridge, they are much elongated and 

 arranged in waving, irregular, discontinuous lines radiating towards 

 the margin of the shell ; in front of the glabella the granulations 

 gradually split up into shorter lengths. 



Fere cheek : There are in my collection three specimens of free 

 cheeks which are associated with the cranidia, and probably belong 

 to the same species. 



The peculiar fragment shown in PL XXIY, fig. 11, gives a view 

 of the under side. It shows a strong and considerably elongated 

 genal spine, at the base of which there is a fold or ridge, and from 

 this the doublure sinks into the matrix to follow the curvature of 

 the upper side. Fig. 10 shows a fragment of, probably, the upper 

 side. In both specimens the surface is finely granular. 



Pygidium (PI. XXIV, figs. 9 a-9 c) : On a specimen kindly lent 

 to me by Mr. H. C. Beasley is an incomplete external cast of a 

 pygidium, which agrees, so far as it goes, with Linnarsson's fig. 4. 

 The convexity is very pronounced (fig. 9 b) ; the axis shows three 

 divisions, in addition to the articulating facet and the bluntly 

 rounded end ; and the lateral lobe shows two well-marked furrows, 

 with a faint indication of a third. 



Locality and horizon. — Comley Quarry; from the conglo- 

 meratic base of the Quarrv-Pidge Grits. 



Dorypyge Dames. 



I have fragments of at least twenty head-shields and as many 

 pygidia which come under this genus, and were derived from the 

 two horizons which I call the Quarry-Ridge Grits and the 

 Hill-House Flags. The specimens from the former, although 

 fragmentary, are excellently preserved, while those from the latter 

 are very fragile casts. 



Dorypyge lakei, sp. uoY. (PI. XXV, figs. 1-8 & text-fig. on p. 291.) 



I take as type-specimens the two head-shields lying side bv side 

 [1163], figured to natural size (PI. XXV, fig. 2) These exhibit all 

 the parts of the cranidium, and consequently I am able to make 

 a complete restoration of it (PI. XXV, figs. 1 a-lc). 



