Clare Island Survey — Acarinida. 39 79 



wide, not quite reaching the middle of the third coxa, outline of the side 

 margins interrupted at the middle, hinder margin notched. Genital plate 

 rather hroad, end margin lying a little beyond the extremities of the pedal 

 plates ; ventro-anal shield semicircular, smaller than in P. italicus, and 

 further removed from the genital plate, lying between the two, are three 

 pairs of very small chitinous plates. Pedal plates large, just beyond the 

 last acetabula they turn inwards, forming a truncated posterior margin. The 

 peritreme is very wide, sinuate, with a post-stigmal continuation reaching 

 the end margin of the pedal plates. Tritosternum (fig. 24b) with a long 

 fused basal part, filaments short and distinctly spinous. Chelicerae 

 moderately long and slender, free chela with two very feeble teeth close 

 to the apex, fixed chela without distinct teeth (fig. 24c). Maxillary 

 plate with four pairs of hairs, lobes straight and slender. Legs very 

 long, the respective length about 737yu, 56bj, 550//,, and 780^(, tarsi of last 

 pair much attenuated. Ambulacra very like those of P. italicus. 



Locality. -Owe example found amongst moss on a stone in a mountain 

 stream at Glencree, Co. Dublin. May. 



Family CELAENOPSIDAE. 



Celaenopsis cuspidata (Kram.). 



Last September I found a single example of this remarkable species 

 under decayed bark at Finglas, in County Dublin. 



Family ZERCONIDAE. 

 Zercon triangularis C. L. Koch. 



Common amongst moss from Knappagh Wood, near Westport ; Croagh- 

 more, Clare Island ; and on A chill Island. 



The Irish specimens are a little more ovate than those figured by Perlese, 

 resembling in tins respect a Scandinavian form recently described by 

 Dr. Tragardh under the name Z. curiosus, of which he remarks: " Ahnlich 

 wie Z. triangularis K. geformt, aber verhaltnismassig breiter mit mehr 

 abgerundeten hinter Ecken " (88, p. 441). Some of the specimens have the 

 two median hairs on the hinder margin of the last dorsal plate longer and 

 stouter than in the ordinary form, approaching the variety caudatus Berlese, 

 described by him as of frequent occurrence in moss on high mountains (15, 

 p. 246). 



Distribution. — Eecorded from Germany and Italy, and doubtless a commou 

 species in western Europe, though it does not figure in Oudeman's Dutch 

 list. 



L2 



