584 Proceedings of the Royal Irish Academy. 



and was on the spot the next morning before sunrise, so that I was 

 enabled to examine the specimen while it was still quite fi'esh. The 

 following will serve as a diagnosis of the new form : — 



Family — Pai^daeijs^a. 



nostrum longum, angustum. Palpi articulati, foliacei. 



Stasiotes rlmiodontis, gen. et spec. nov. (Plate 35, figs. 1 to 14). 



The cephalothorax is nearly as broad as long, projected somewhat 

 in front where the frontal lamina becomes conspicuous. It is very- 

 transparent, which will account for the markings to be seen on figure 

 2, where there is an appearance as if the cephalothorax were seg- 

 mented. The sides project backwards, forming lobes so as to cover 

 the free edges of the first abdominal ring. The first abdominal ring 

 is naiTow, not extending at cither side so as to touch the prolonga- 

 tion of the cephalothorax. The second abdominal ring is somewhat 

 broader and even wider, with delicately ciliated appendages, somewhat 

 like those to be met with in Demoleus paradoxus, Heller. The last 

 abdominal ring is furnished with very feebly developed wing-like 

 projections, which lie slightly over the largely developed genital 

 ring ; the edges of these rings are clothed with bristle-like hairs. 



The genital ring is rounded in the front and at the sides, obtusely 

 truncated, and somewhat notched behind, a little less than one-half in 

 length of the cephalothorax. The caudal ring is narrow — quite hid under 

 the genital ring — but the caudal appendages (figure 14) are visible. 



The anterior antennae (figure 5) are biarticiilate, and spring from 

 the under surface of the frontal lamina; the first joint is twice as 

 broad and as long as the second, and just behind its articulation with 

 the second it is set over with a few minute bristle-like hairs ; the 

 second ends abruptly in two or three bristles. The posterior antennae 

 (figure 7) are stout and four-jointed; the third joint is twice as long 

 as broad, and is barely covered by the front portion of the cephalo- 

 thorax ; the fourth joint consists of a long incurved claw. The 

 rostrum (figure 6ffl) is long and narrow, consisting of two halves in- 

 closed in a sheath each of which (figure 6c) is terminated by a series 

 of tooth-like projections. The palpi (figure Qa) are small, feebly 

 biarticulate, and very slightly foliaceous. The base of the rostrum 

 with the palpi is situated between, and a very little below, the origin 

 of the posterior antennae. 



The first pair of maxillary feet (figure 3) are of tbie shape and form 

 usually met with in this group, but just at the base of the chelae, and 

 on their outer surface, there is a scale-like body (figure 8a), which is 

 thickly set with short, stiflt hairs of the same nature as those which are 

 developed along the margins of the pincers. The second pair of 

 maxillary feet (figure 9) are broad and large : the claw-like terminal 

 joint can project beyond the edge of the cephalothorax; both the thii'd 

 and fourth claw-joint carry a stiff bristle. 



