252 Proceedings of the Royal Physical Society. 



Dorsum. — With a number of symmetrically arranged perforate plates 

 with thick margins, and sclerites. Along each side of the dorsum 6-7 

 large polygonal plates, and between these plates four ligulate sclerites. 

 Closer to the median line and on each side of it, three ligulate sclerites 

 with a lunate perforate plate and gland aperture on the inner side of each. 

 Nearer to the centre of the dorsal surface a pair of triradiate sclerites, 

 behind these a pair of ligulate sclerites, with another posterior thereto in 

 the median line. 



Eyes. — Each capsule, with its double eyes, lying about "45 mm. apart 

 on the lateral margins of the cephalo-thoracic plate. 



Cephalo-thoracic plate. — Composed of a fan-shaped framework of narrow 

 cbitinous slips, the intervals between these being for the most part not 

 specially chitinised. Area surrounding each of the gland-pores, particularly 

 on the anterior margin, the bases of the eye-capsules, and the area enclosed 

 by the posterior process, all distinctly porose. 



Capitulum. — Breadth at the base about "29 mm., length about '33 mm., 

 more or less porose, rather thickset in appearance and without a rostrum. 

 Mouth, having a diameter of *14 mm., situated at the extremity of the 

 capitulum. Mandibles short and thick, with claws bent almost at right 

 angles ; each claw terminating in a small rounded process. 



Palpi. — Length of segments from base to tip respectively - 028, '094, 

 •132, - 122, - 085 mm. Second and third segments with distal end nearly 

 twice as thick as proximal ; terminal segment slightly set into the penultimate 

 one. Inner distal margin of third segment with a row of 6-7 pectinate 

 bristles. Near the middle of the fourth segment, a long fine hair on the 

 flexor surface and one on the extensor surface. Distal end of fifth segment 

 blunt, without claws, with 4-5 long hairs and several smaller ones. 



Epimera. — In four groups, two on each side, with an interval of nearly 

 •28 mm. between the second and third pairs. Fusion of the inner margin 

 of the first and second pairs incomplete. Third pair reaching much nearer 

 to the median line than the almost triangular fourth pair. Posterior angle 

 of fourth pair with a narrow chitinous process. 



Legs. — First pair, r09 mm.; second and third pairs, 1/27 mm.; fourth 

 pair, 153 mm. Claws moderately curved, simple. Without swimming 

 hairs but with numerous spines and bristles ; the whorls of spines on the 

 distal end of the middle segments of the first three pairs of legs for the 

 most part pectinate. 



Anus. — Situated close to the anterior margin of a large, more or less 

 elliptical, porose plate ; margin of plate rather thick. 



