312 Point Levi Fossils, 



strengthened by a narrow convex rim a little more than its own 

 width from the front of the glabella, just within which is a curved 

 row of punctures with fine striae as in D. Oweni. Glabella 

 elongate conical, depressed convex, front rounded, sides nearly 

 straight, slightly converging from behind forward. Neck furrow 

 straight in the middle, turned slightly forward towards the ends. 

 In front of this two other short furrows on each side dividinof the 

 glabella into three lobes of which the anterior is the largest ; the 

 posterior furrows sometimes obscurely connected on the median line 

 their outer extremities directed forwards at an angle of 45 '^ with 

 the longitudinal axis of the body ; the anterior pair nearly at 

 right angles but sloping a little forwards, their inner extremities 

 not connected. On the front lobe there appear to be indications 

 of a third pair of furrows on one of the specimens. The eyes are 

 semi-annular, nearly half the whole length of the head, their 

 anterior corners a little in advance of the outer extremities of the 

 anterior glabellar furrow ; their centres distant from the sides of 

 the glabella, one third the width of the neck segment, their upper 

 and lower angles, half that distance. Surface except the striated 

 front margin apparently smooth. 



Cheeks, thorax and pygidium unknown 



Length of largest head seen five lines and a half; of glabella 

 four lines and a half ; width of glabella at neck segment three 

 lines and a half nearly and at front furrows three lines. 



Limestone, No. 1. 



DiKELLOCEPHALUS CRISTATUS. N. S. 



Fig. 10. 

 Descri2)tion, — Small, head apparently semicircular ; front 

 margin with a strong rim abruptly elevated on its posterior edge 

 and thence descending with a flat slope to the anterior edge, dis- 

 tant about its own width from the front of the glabella, with a 

 row of punctures as in J). Oweni, Glabella oblong, front and 

 sides somewhat straight, anterior angles rounded, neck segment 

 and furrow well defined, no glabellar furrows. The glabella just 

 in front of the neck furrow is abruptly elevated into a sharp 

 rounded roof-shaped ridge from which it descends with a flat or 

 gently concave slope to the front and lateral margins. Eyes very 

 large, full one half the whole length of the head, their posterior 

 angles close to the glabella at the neck furrow, thence they curve 

 outwards so that their centres are distant from the sides of the 



