F. R. Cotvper Reed — Sedgwick Museum Notes. 107 



as long as whole glabella or rather more ; transversely subquadrate 

 in shape, with arched front end ; not rising above general level of 

 rest of glabella, nor detached from it ; lateral angles circumscribed 

 by facial sutures. Three pairs of lateral glabellar lobes present; 

 first pair the largest, triangular in shape, extending back along axial 

 furrows to middle of eyes ; second and third pairs of lateral lobes of 

 subequal size, and with subparallel anterior and posterior sides. 



Three pairs of lateral glabellar furrows present ; the basal pair 

 the strongest. First pair straight, obliquely inclined to axial 

 furrows at about 45° or 50°, arising a little in front of eyes and 

 extending inwards for about two - fifths of the width of the 

 glabella on each side ; scarcely widening at their outer extremities. 

 Second paii- equal in depth and width to the first, horizontal, nearly 

 straight or slightly arched forwards, arising nearly opposite middle 

 of eyes and extending inwards for about one-third or rather more of 

 the width of the glabella on each side. Third or basal pair deeper 

 than the preceding pair, horizontal or slightly ■ oblique, straiglit, 

 situated half-way between second pair and occipital furrow, and 

 extending on each side inwards for about one-third of the width of 

 the glabella. 



Occipital furrow strong, arched forwards in middle. Axial 

 furrows rather weak, especially round lateral angles of frontal 

 lobe ; diverging anteriorly at about 20° in a slight concave curve 

 from base of glabella to anterior end of eyes, in front of which they 

 sweep outwards round the frontal lobe, merging imperceptibly into 

 the nearly obsolete marginal furrow of the head-shield. 



Fixed cheeks with anterior wing much reduced in size owing to 

 lateral projection and width of frontal lobe ; posterior wing with 

 a basal width equal to about one and a half times that of the glabella 

 at its base ; posterior mai'gin gently arched ; neck segment marked 

 off by strong deep furrow dying out before reaching lateral margin ; 

 lateral marginal furrow nearly obsolete. Genal angles measuring 

 about 60° or more, and furnished with small sharp spinules. Eye- 

 lobes large, prominent, semicircular, horizontally extended at same 

 level as glabella. 



Facial sutures with anterior and posterior branches making angle of 

 about 70° ; anterior branches curve round, defining lateral angles 

 of frontal lobe, and unite in regular convex curve in front of it, 

 •which they thus bound ; posterior branches curve slightly forward 

 in a sigmoidal manner fi-om base of eye to cut lateral margin a little 

 behind the level of second lateral glabellar furrows. 



Free cheeks small, triangular, united in front by the narrow, 

 flattened, horizontal anterior border of the head-shield. Eyes large, 

 prominent, high, strongly curved, but not angulated ; extending 

 from a little behind first lateral furrows to third lateral furrows of 

 glabella ; distant from posterior margin of head-shield about two- 

 thirds their length ; nearly touching side of glabella at their front 

 end, but more remote at their posterior end ; lens-bearing surface 

 steeply inclined or vertical, with about 30-35 vertical rows of 

 lenses having 10-12 lenses in the middle rows. Surface of glabella 



