THE NATURAL HISTORY SURVEY. 255 



Ceratocephala goniata Warder, pi. xxm, figs. 1-2. 



Description. Cephalon short and strongly convex, trans- 

 versely sub-elliptical in outline, the whole surface strongly 

 tuberculate. Glabella broadly sub-ovate, moderately convex, 

 scarcely defined by the dorsal furrows which follow a convex 

 curve and become most strongly impressed at their junction 

 with the occipital furrow, a little wider than long, the greatest 

 width at about one-third its length from the occipital furrow, 

 about three-fifths the entire width of the cephalon, its pos- 

 terior margin nearly straight; median. lobe well defined, elongate 

 sub-ovate in outline, its length being equal to the total length 

 of the glabella, slightly protuberant in front, its greatest width 

 nearly two-thirds its length, its width in front three-fourths 

 its width behind, a little more than one-half the width of the 

 entire glabella, anterior lateral expansions slight and depressed, 

 coalescing with the ocular ridges; lateral lobes depressed below 

 the median lobe, the anterior pair almost obsolete and scarcely 

 separated from the anterior lateral expansions of the median 

 lobe; second lobes trapezoidal or v sub-rhomboidal in outline, 

 their longer axes directed obliquely outward and forward, 

 coalescing laterally with the cheeks; third lateral lobes nearly 

 twice the size of the second pair, sub-ovate in general outline, 

 their apices directed obliquely outward and forward, sharply 

 defined posteriorly by the occipital furrow, coalescing laterally 

 with the cheeks. Anterior pair of lateral furrows scarcely dis- 

 tinguishable, second and -third pairs deeply impressed at their 

 inner extremities, directed obliquely outward and forward. 

 Cheeks sub-quadrangular in outline, facial sutures not recog- 

 nizable. Eyes small, situated near the center of the cheeks, 

 connected anteriorly by a sharply defined, raised, rounded 

 ocular ridge, with the anterior lateral expansions of the median 

 glabellar lobe; posteriorly from the eyes a furrow faint at first 

 but becoming strongly impressed posteriorly, follows a back- 

 ward, upward and then inward curve to its junction with the 

 occipital furrow. The inner portion of the cheeks, bounded 

 anteriorly by the ocular ridge and posteriorly by the furrow, is 

 convex, its surface being essentially a continuation of the sur- 

 face of the lateral glabellar lobes, it is sub-ovate in outline, 

 acutely pointed in front, and is divided longitudinally by 

 a slight furrow which originates opposite the median glabellar 

 furrow and extends backward with a slightly convex curve to a 

 point nearly opposite the posterior glabellar furrow and then 



