130 Proceedings of the Royal Irish Academy. 



zone. Malahide estuary, Howth, DoUymount, Bray, &c., on the Dublin Coast. 

 On the west coast of Ireland it is equally common at Ardfry, Westport, and 

 Muhanny districts. The adult and nympha honieomo^-pha stages are figured 

 (fig. 12 a, b). 



Phaulodinychus orchestiidarum (Barrois). (PI. XXII, fig. l:'> a, d.) 



1887 Uropoda orchestiidarum Barrois (nympli) 1. 1S89 Berlese et 

 Trouessart 20. 1902 Trouessart 52, p. 38. 1910 Berlese 17, p. 13G. 1918 

 Berlese " Redia " xiii, p. 190. 



Usually a comniou species where it occurs, ranging from the Pelvetia down 

 to the Serratus zone. At Malahide it lives cliietly between moist limestone 

 flakes where there is some sandy mud. At Ardfry tlie habitat is under 

 stones partly embedded in damp mud. 



The species was de.scribed liy Barrois from the nymplial form which he 

 found attached to the common shore Amphipods, Orchestos, and Talitni.s (1). 

 The female does not seem to have lieen described ; it may Ijc recognized by the 

 characters indicated in the preceding table and the accompanying figures 

 (PI. XXII. 6g. 13 a, d). 



Trachyuropoda minor (Hal ht.). (PI. X.KII. lig. 14.) 



19 1") ITnhn-opoilft minor Hall>erl 25, p. 90. 



A fairly common species often found in company with rhnnhdinychiis 

 rrjJctus on estuarine shores. At Malahiile it was ob.served in the Orange 

 Lichen and Pelvetia zones between rather dry • limestone flakes and on 

 calcareous tiiHa, where a small stream flows on to the seashore ; also a single 

 specimen, in the ni/mpha homeomorplut stage, fixed on the under sjije of 

 Orrhestia (jammnrns. It occure in the same zones at Ardfry under stones 

 resting on mud. Many specimens were once taken from amongst the.^deljris 

 of old nests of Puthns and Gulls on The Bill rocks oil the Mayo w»ast. 

 Berlese refers (in litt.) this species to his sub-genus Dinycliura, wliifh is 

 recorded in a short note in (15, p. 85). 



Dinychns sp. 



The only example of this genus found dnringonr shore work is immature, 

 an<l I have not sncreoded in determining the species; It occurred under 

 damp Hakes in the uppermost Orange Lichen zone, immediately under the 

 " grassy sward," and is possibly not a regular denizen of the intertidal shore. 



