46 14 Proceedings of the Royal Irish Academy. 



Canthocamptus (Attheyella T) praegerr n.sp. (pi. I, figs. 1-9). — -S' 



characters.— Female: Body rather short and thick, tapering considerably 

 behind. Eostrum small, situated on a rostral plate, indistinctly separated 

 from the rest of the cephalic segment. Abdominal segments spinulose 

 on posterior margins ; also rows of excessively small spines on the dorsal 

 surface of the last thoracic and first abdominal segments (fig. 6). Edge 

 of anal plate fringed with numerous fine hairs. Furca (tig. 8] short, 

 obliquely truncate, armed with strong spines on both inner and outer 

 margins. The two principal setae on each lobe stout and widely 

 divergent ; small inner seta bent inwards a little beyond base. 

 First antennae short, seven-jointed (with last joint very indistinctly 

 divided), the last five joints being at an angle to the first two. Accessory 

 branch of second antennae indistinctly two-jointed with four stout setae 

 (two lateral and two terminal) and a very small spinule near the tip. 

 First pair of feet (fig. 4) with both branches three-jointed, inner just 

 a trifle longer than the outer. Second, third, and fourth feet 

 with three-jointed outer and two-jointed inner branches (fig. 5,. 

 Fifth feet (fig. 7j with distal joint moderately large, broadly ovate, and 

 armed with five setae, the two outer being short. Inner expansion of 

 basal joint broad, extending slightly beyond distal joint and armed 

 with six setae, the two outer and two inner being short. Length (in 

 preserved condition), without tail setae, -^ inch. 



Male unknown. Spermatophore (fig. 9) cylindrical, with rounded 

 distal and more tapering proximal end, attached to genital segment of 

 female by an unusually long, slender tube, bent near junction with body 

 of spermatophore. 



Only a single specimen of this new species has been seen. It was 

 obtained from wet moss from the side of the little stream flowing from 

 the Light-house Marsh to the coast on Clare Island. The most striking 

 feature, and one which separates it at a glance from all other species of 

 Canthocamptus, is the peculiarly divergent character of the two large 

 setae on each furcal lobe. The species belongs in the main to the 

 Attheyella section of the genus Canthocamptus, but presents some 

 unusual characteristics, e.g., seven-jointed first antennae. I have much 

 pleasure in naming it after ill*. K. Lloyd Praeger, to whom the Clare 

 Island Survey owed its inception and continued inspiration, and to 

 whose patient labour and never-failing enthusiasm and encouragement is 

 due so much of what is known to-day of the Irish fauna and flora. 



Canthocamptus ( Mesochra ) hirticomis Scott. — Only found in Kinnacorra marsh 

 pond on Clare Island, the water there being slightly brackish, as might 



