116 Proceedings of the Roi/al Irish Academic . 



the male and female of the typical fonn the ambulacra and claws are missing 

 from the first pair of legs, while in the variety fairly well-developed claws 

 are present in the female, though they are absent or rudimentary in the 

 male. 



Habitat. The variety pallidns Hull occurs at Malahide in the Orange 

 Lichen, Pelvetia, and Spiralis zones, usually between limestone flakes where 

 there is some sandy mud, in from almost dry to moist situations. The dates 

 of capture range from March to October. 



Halolaelaps glabriusculus Derlese et Trouessart. 



1875 ? Gamasus marinus Brady 21, p. 307. 1889 Berlese et Trouessart 

 20. p. 2. 1890 Zircon inariiins Monie/ 38, p. 13. 1902 Pnrasilus mai-iiins 

 Oudcmans 41, p. 2.SI. 1906 Berlese 11, p. 109. 19U King 27. p. 135. 

 1915 Halberl 25. p. 56. 1918 Hull 26. p. 77. 



A characteristic species in the lower zones of the iniertidal area, I have 

 usually found it in crevices and between limestone Hakes in theVesiculosus and 

 Serratiis zones at Malahide. It may also \>e found under stones on estuarine 

 and non-rocky shores, as at Ardfry and 'Wesii>ort, in the West of Ireland. 



Halolaelaps celticos Ilalbt. 



1915 HaliRit 25, p. 57. lOlti Hull 26. p. 77. 



Found undtr stones just below high-water mark on the seashore at, 

 Westport, July, 1911. It is very abundant at Howth in a similar habitat 

 amongst decaying seaweeds, September. 1913. I did not succeed in finding 

 it on tlie rocky shore at Malahide. Hull has recorded it from the Tyne 

 province (26). 



Gamaselloa Berlese- 



The genus Gamaselius was first established as a sub-genus of Cyrlolae- 

 lape by Berlese in the supplement (3. p. 61) to his Monograph on Italian 

 mites (2 . No type species was sjiecially indicated, though four species are 

 referred to the new sub-genus ; of these it is necessary to select Gamaselius 

 falcvjtr (G. et R Can.) as the type of Gamaselius. The reason for this selection 

 is that all of the four species are not congeneric, and Berlese makes it quite 

 clear in a later reference (9) that Gamaselius is intended to include those 

 species in which th>- -'■■■• ■' and venlro-anal plates are united in the male ; 

 such is the case in '■ '< Mriijrr, a j:cmj<1 fissure of which will l>e found 



in (2, Fasc. LXlll, n. 4). 



The four species originally reieneu Vt Giiuiaaclhi.-i aic U.Jiilaijcr (\j. et 

 K. Can.), G. apiriconii* (G. et K. Can.;, O. captator lierlese, and U. comutus 



