Head-shield broadly semicircular, gently convex; posterior margin nearly straight; middle shield projecting slightly in front of cheeks, and rather bent down. Glabella subquadrate, length slightly greater than width, front truncate, nearly parallel-sided, widening a little anteriorly to maximum across first lateral lobes, moderately convex from side to side, rising gradually in height from back to front, where it is somewhat swollen and slightly overhangs anterior margin of headshield; sides marked with three pairs of regular, subparallel, subequal, and nearly equidistant, strong lateral furrows; anterior pair nearly straight, directed a little obliquely backwards, and extending inwards for about one-third the width of the glabella, situated far forward at about one-fourth the length of the glabella, and a little in front of the point of junction of the axial and marginal furrows; frontal lobe short, broad; second pair of lateral furrows nearly straight, arising a little in front of middle of glabella, running in wards parallel to first pair, but a little longer; first lateral lobes with parallel sides; third or basal pair of furrows with inner portion curved back, but not reaching occipital furrow; second lateral lobes of same length along axial furrow as first pair; basal lobes subrhomboidal, rather less than one-third the width of the glabella. Occipital furrow strong, arched forward slightly in middle and at sides. Occipital ring rounded, rather narrow, a little wider in middle. Surface of glabella and occipital ring ornamented with rather coarse tubercles, with smaller ones interspersed. Axial furrows strong, straight, meeting marginal furrows at right angles a little behind first lateral furrows of glabella.