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Scutum triangular (PI. XXV, fig. 13 a 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 (PI. XXV, fig. 13, b and d) 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: lab rum (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 (PI. XXV, fig. 15A) 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 rd and 4" 1 teeth and of the inferior angle with 2 or more very small 

 accessory teeth; (the mandible of the other side (fig. 15^) 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 (PI. XXV 7 , 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 maxi 11a e 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 langer 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 1 5 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" 1 — 6 th cirrus, only on the 



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