39 90 Proceedings of the Royal Irish Academy. 



Localities. — Occurs commonly under stones on the sea-shore at and a 

 little below high-tide mark, and also in salt-marshes. Westport, 3 , and 

 5 with eggs July ; Mulranny, $ 9 and nymphs, September. I have found 

 it in county Dublin at Howth and at Dollymount salt-marsh in November. 



Haluropoda minor sp. nov. (PL VII, fig. 29a-d.) 



Male (tig. 29a). — Length 614//, breadth 460/i. Colour reddish-brown, 

 shape oval. Dorsal armature consisting of a long oval central plate, and two 

 marginal plates, which leave a small part of the end of the body uncovered. 

 Central plate with exceedingly fine punctures and also with very coarse 

 punctures : there are at least three double rows of piliferous pores as well 

 as some scattered hairs. Marginal plates long, coarsely granulated, tapering 

 to obtuse extremities which almost reach the end of the central shield, on 

 the outer margin there is a row of hairs. Uncovered end of the body with 

 a few hair-bearing pores. Imbedded in the side margins of the body are a 

 number of modified hairs very similar to the T-shaped hairs found in the 

 genus Traehyuropoda. 



All the ventral plates are fused. Peritreme and leg pits very similar to 

 those of the preceding species, hinder margin of last pair widely rounded. 

 Genital area opposite the coxae of the third pair of legs, ovate, narrowed, and 

 somewhat truncated in front (tig. 29b). Coxae of first pair of legs rather 

 short, and strongly angled on the inner side, fenrur armed with a papilla, 

 placed distally. The femur of the second pair carries a curved spur and in 

 front of it two small round lamellae ; there is a smaller spur on the patella. 

 The third and fourth pairs, and the ambulacra, are of the usual uropodid 

 type. Tritosternum, base small, main stem with a distinct branch near the 

 middle on each side, extremity also branched. 



Capitulum short and very broad, there are three pairs of small spines 

 on the ventral surface, the middle pair, placed slightly in front of the palp 

 acetabula, are stout and spur-like, and two very long bristles stand close to 

 the bases of the maxillary lobes. Epistome and chelicerae similar to those of 

 the preceding species. Palps short and stout, ventral surface of first segment 

 with a distal prominence and two bristles, one long and extremely finely 

 spinous ; second segment with about four stout spines : the third segment 

 fig. 29ej is armed on its inner surface with a sharply pointed spur, and behind 

 this spur there is a long sabre-like bristle, dorsal surface with two long 

 spines. On the fourth segment there are six or seven dorsal spines, two of 

 these spring from large pores, and on the ventral surface one very long 

 bristle. 



Female (fig. 29</). — Length 627/u, breadth 462/u, closely resembling the 



