Clare Island Survey — Acarinida. 39 7 



The capitulum (PI. I., fig. be) is very similar to that of infimdibulifera ; the 

 length of the maxillary plate is '588 mm. Both the front and hinder processes 

 are long and broad ; the latter are evenly rounded at the apex. Air-tubes 

 rather broad, sinuate on the front margins, and they slightly overreach the 

 hinder lateral processes. 



The mandibles are of the usual shape ; a character which deserves mention 

 however, is the shape of the projection — which Thon calls the stigma — on the 

 front margin of the mandible. In the present species this is blunt (PI. I., 

 fig. 5^), while in the allied species it ends in a sharp point. (PL I., fig. 36). 



The palps (PL I., fig. oe) measure about 1*356 mm. in length, being a 

 little longer and more slender than in E. infwndibulifera. A remarkable 

 feature of the second segment is the absence of spines from the middle part 

 of the inner distal margin ; but there is a row of three pectinated spines 

 towards the inner end, and two more are placed on the ventral surface ; the 

 dorsal surface of the segment carries seven or eight smooth bristles. The 

 third segment shows scarcely any trace of a ventral prominence, being almost 

 parallel-sided, lower part of the inner side with about eighteen or twenty 

 spines, many of which are pectinated ; about eight of these are placed in a 

 group on the apex of the segment. The fourth segment is of very uniform 

 breadth, not so strongly angled on the ventral side as it is in the allied species, 

 lower half of the inner surface furnished with about thirty long spines ; several 

 of those placed towards the end of the segment are pectinated, and in 

 addition to these there is a row of five or six strongly pectinated spines 

 along the distal margin. The fifth segment is slightly bent towards the apex, 

 inner side armed with from ten to twelve stout spines, while the outer side 

 carries seven or eight; apex furnished with a group of five or six rather 

 slender and sharply pointed spines, the dorsal surface with four or five long, 

 smooth spines. 



The leg-measurements of the Glendalough specimen are about as follows : — 

 First leg, 2-892 ; second, 3"072 ; third, 3-302 ; and the fourth, 3763 mm. 



Localities. — Glendalough Lake, Conneniara, September, 1905, a mature 

 specimen ; Castlebar Lough, immature, June, 1909 ; Crincaum Lough on 

 Cromaglaun mountain, Killarney, immature, June. 



Eylais Soari Piersig. 

 Glendalough Lake, Conneniara, September, 1905. 



Eylais similis Thon. (Plate I., fig. 6.) 



Lakes on Clare Island ; at Westport and Louisburgh. 



A species which is apparently referable to E. similis Thon is abundant 



