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Scutum triangular (Pl. XXV, fig. 13 @ and c) elongate, with the growth-ridges very 
prominent and a distinct, rather broad longitudinal furrow. On the inner surface the articular 
ridge is rounded, narrow, not prominent, the adductor ridge only feebly indicated and the 
depression for the adductor muscle very distinct, and forms a rather deep oval pit. 
Tergum (Pl. XXV, fig. 13, 6 and @) slightly smaller than the scutum, with the apex 
distinctly beaked and the carinal margin rounded; the growth-ridges are much less distinct 
than on the scutum. On the inner surface the articular ridge is not very prominent and the 
crests for the depressor muscles, though distinct, not very conspicuous, nor extending beyond 
the basal margin. Spur broad, not very distinct, flat and rounded at the extremity. Both scuta 
and terga coloured brick-red on the inner surfaee. 
Mouth: labrum (PI. XXV, fig. 14) swollen, especially laterally where the palpi are 
attached; edge hollowed out but without a central notch. It is furnished with very delicate 
hairs in the middle and has small teeth on both sides; of these, several are bifid or even 
trifid at the apex. Palpi large, broad, rounded at the apex, with long curved hairs disposed 
along the margin and on the outer surface, and numerous shorter ones along the upper margin. 
The palpi nearly touch one another in the middle of the labrum. 
The mandible (Pl. XXV, fig. 154) has four teeth, and the inferior angle armed 
with a single point and a series of short hairs — not pectinated as it commonly is. The upper 
or dorsal side of the 3% and 4t® teeth and of the inferior angle with 2 or more very small 
accessory teeth; (the mandible of the other side (fig. 15a) somewhat abnormal in the specimen 
which was examined: the four teeth pointed, and standing close together, the inferior angle 
longitudinally extended with two steps and a terminal angle. 
The maxilla (Pl. XXV, fig. 16) can hardly be said to have a notch beneath the upper 
pair of spines. Beneath these two upper spines, 4—5 smaller spines are observable and beneath 
them there is an indication of a notch, being the upper limit of the somewhat step-formed 
projection which represents the remaining part of the edge of the maxilla. This part of the 
edge is furnished with 16—20 nearly equally stout spines, of which the 4—5 last ones are 
somewhat shorter and less strong. 
The outer maxillae have the inner surface bilobed, but only very indistinctly. 
Cirri. First pair short, with the rami distinctly unequal in length: the longest having 
14 segments, the shorter 10. The lowermost segments of the longer ramus are broader than the 
uppermost, as are also those of the shorter ramus. All the segments have the surface thickly 
clothed with spines, the upper ones, however, in a less degree than the lower segments. 
Second pair, with the anterior ramus having 12 slightly broader segments, and the 
posterior 15 slightly narrower segments, all thickly covered with spines. 
Third pair, with the rami very unequal, composed of 19 and 43 segments respectively. 
In both rami, the 14—15 lower segments thickly covered with spines. The four remaining 
segments of the anterior (shorter) ramus have two (or three) pairs of spines on their inner face 
and a group of two or three spines at the posterior margin near the extremity. The posterior 
(longer) ramus shows the same two pairs of spines, with the small bristles situated between 
the two of each pair, which are seen on all the segments of the 4**—6t cirrus, only on the 
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