Clare Island Survey — Arcliscoida. 37 5 



small discs, uniform, close together. Lateral processes five on each side — a 

 and b setae of moderate length, c and d very long setae, e a short, thick spike. 

 Dorsal processes three pairs — over b a slender seta, over c and d very large 

 and thick spines. Fringe on fourth leg of large triangular teeth, separated at 

 their bases. Claws large, with small inner barbs. 



Length about 200 li, exclusive of fourth legs. Seta a 50 li, b 50 li, c 100 li, 

 d 150 li. Seta over b 30 li, spine over c 50 it, over d 50 li. Seta a has the 

 usual palp at its base. Lateral and dorsal setae at b very fine ; setae c and d 

 with thick bases and very fine points. Spines over c and d straight, or nearly 

 so, very thick and stout, not flattened, but round. Spine e also thick and 

 round, sometimes enlarged in middle. The dots are pellucid discs, almost 

 touching at their bases, in regular rows. They did not seem to be either 

 raised above the general surface, or depressed. None of the plates is crossed 

 by plain bands. The lumbar plate is trifoliate, and obscurely faceted. 



The claws measure about 25 it in length. The larva has not been seen. 

 A skin of 180 li in length contained two eggs of 60 li by 50 li. 



Habitat. — Castlebar, among Cinclidotus at margin of small lake near the 

 railway station. 



E. militaris is distinguished from all other species by having dorsal setae 

 over b, by the extraordinary thickness of the spines over c and d, and by the 

 stout spike at e. Only E. africanus has setae over b, and it has several pairs of 

 them, and is otherwise very different. E. bellermanni and E. crcplini might 

 be supposed to have spines over b ; but it is difficult to tell exactly what the 

 figures are intended to show, and at any rate they differ widely from 

 E. militaris. 



Echiniscus columinis sp. n. (Plate I., figs. 3a-3b.) 



Specific characters. — Size moderate, colour red. Plates nine, v and vi joined, 

 two median, dots small, uniform, pellucid. Lateral processes five, all fairly 

 long setae. Dorsal processes two — over c a long seta, springing nearer the 

 middle line than the posterior angle of the plate ; over d a short spine. 

 Fringe on the fourth leg ; inner claws barbed. 



Length about 200 li, exclusive of fourth legs ; seta a about 75 ll ; b, c, and 

 d 50 to 60 ll each ; e 125 li. Dorsal seta over c 80 li. Fringe of small 

 triangular spines. The setae taper gradually from the base. The dots appear 

 to be flat granules, but they sometimes look like pits. 



Habitat. — Summit of Slievemore, Achill Island. 



There are only a few Echinisci described which have five lateral setae. 

 E. scrofa and E. quadrispinosm both possess some additional plates between 



