Clare Island Survey — Acarinida. 39 89 



third quarter of the body; in the cuticle of the uncovered part of the dorsum 

 are about six pairs of hair-bearing pores ; there are also a few fine hairs on 

 the posterior margin. Ventral surface (fig. 28&) highly chitinized; in the 

 epigastric region the metapodial line runs inwards from the margin of the 

 body, immediately behind the last pair of leg pits, becoming evanescent 

 towards the anal region. Leg pits well developed, consisting of single 

 depressions in the integument The genital foramen lies between the coxae 

 of the third legs, oval, occupied by two small crescentic plates, aperture pear- 

 shaped. In the sternal plate on each side are three hair-bearing pores. 

 Peritreme short, rising on the side margin of the body it runs along the 

 mesopleural ridge, it then turns downwards for a short distance into the leg 

 pit of the third leg. Tritosternurn hidden by the first coxae, basal piece 

 rudimentary, stem with a small branch on each side beyoDd the middle, apex 

 very finely branched. Legs, first pair unarmed, coxae with inner basal 

 prominence and outer incised lamellar plates. Femur of second pair carrying 

 the usual spur, as in Uropoda, and also a smaller spine beyond the middle, 

 the patella has a small distal spine, and the tibia is unarmed. Femora of 

 the third and fourth legs with the pointed lamellae usual in the Uropodidae. 

 Ambulacra of first pair of legs reduced, thin at the base, strongly thickened 

 at the apex, in which the small, stout claws are deeply imbedded, ambulacra 

 of the three posterior pairs, much as in Cilliba (fig. 28c). 



The capitulum is broad and strongly convex below ; maxillary plate, one 

 pair of long bristles in front and three pairs of short ones in the middle. 

 Maxillary lobes small ; central processes consisting of two adjacent rods, 

 bifurcated at their extremities. Epistome long and narrow, base with a few 

 strong spines, densely pectinate at the middle, and the apex appears to be 

 forked. Chelicerae drawn deeply into the body cavity, small; fixed chela 

 with rounded terminal hood, there is a small prominence on the middle of 

 the blade ; free chela much shorter with a tooth-like process half way between 

 the middle and the terminal tooth, or there may be scarcely any trace of 

 armature. 



Female. — Length 896^. Apart from the genitalia, the armature of the 

 second legs, and a few other points the female strongly resembles the male. 

 The genital plate is large (176/u x 132/i), widely rounded in front and truncated 

 at its hinder margin, coarsely granulated in front, and near the hinder margin 

 there is a pair of minute hairs. The tritosternurn differs from that of the 

 male in having a large crown-shaped basal piece with strong lateral angles 

 and a bluntly pointed central process. The ventral shield of the capitulum 

 is less convex, with a pair of long hairs near the base of the maxillary lobes 

 and three pairs of short hairs, arranged more or less in a line, behind these. 



