A NEW AND ANNECTANT TYPE OF CHILOPOD. 419 



the foi'e margin of the cephalite, and consist of about the 

 same number of segments as is found in the primitive 

 Scolopendromorpha. The labral sclerites are distinct, 

 and the labral border is deeply and subquadrately excised in 

 the middle, the sides of the excision being- membranous and 

 furnished with bristles, while its anterior border is armed 

 with five teeth (PI. 23, fig. 9). 



Gnathites. — The first pair, or mandibles, are furnished 

 beneath (posteriorly) with a thick fringe of hair, and above 

 (anteriorly) with a large membranous lobe beset with short 

 hairs ; between this lobe and the hairy fringe appear nine 

 pectiniform, horny teeth, arranged in slightly overlapping 

 series of three each (PI. 23, figs. 10 — 12). The second pair or 

 maxillae much resemble those of, e.g. Scolopendra, the 

 basal segment (coxa or stipes) having its proximal margin 

 widely rounded, the first segment of the ectocorm (= first 

 malar segment of the external maxilla of Latzel) short, and 

 the second segment (= second malar segment) a little longer 

 than broad and evenly convex along the margin; the entocorm 

 (= internal maxilla) consists of a single short segment. The 

 basal segments of the right and left sides meet in a much 

 longer sutnral union than is seen in Scolopendra (PI. 23, 

 fig. 13). 



The palpognaths (= labial palpi, second pair of maxillae, 

 or first pair of maxillipedes) are also much like those of Scolo- 

 pendra, but the ectocoxite (= outer segment of the stipes of 

 Latzel) is more strongly produced posteriorly. As in the 

 genus just mentioned, the distal segment is swollen and 

 thickly fringed on its upper (anterior) margin, but the claw 

 is almost concealed in hairs, both from its anterior and 

 posterior aspects (PI. 23, figs. 14, 14a). 



The toxicognaths (second pair of maxillipedes, poison- 

 jaws or prehensors) present a combination of characters re- 

 calling those of Scolopendra in the presence of dentate 

 prsecoxal and praeaxial femoral processes; those of Mecisto- 

 cephalus and some other species of Geophilomorpha in 

 the large-size and subquadrate shape of the coxal plate, th^ 



