140 Proceedings of the Roijul Irish Academy. 



coast of Ireland, at Mulranuy, it is represented by a well-marked colour 

 variety, alholincalus Ilalbl. (2b), which was found in large colonies under 

 deeply embedded stones well below high-water mark. 



Family ALICHIDAE 

 Alicus oblongus sp. nnv. (I'l. XXI 1 1, tig. 23 a, c.) 



A very distinct species, which may be recognized by the foini of tlie body 

 and the hair armature of the cephaloLhorax. 



Colour, while, tinged with rose. Length, about ooO/i ; breadth, 160ju. 

 Tlie body is of an elongate oval shape; shoulders not prominent, and but 

 slightly constricted. Hair armature sparse, of short, strongly plumose spines 

 (fig. 28 c). Epidermis minutely .striated. The cephalothora.x (fig. 23 a) is 

 relatively large and wide at the base. E)'es small, placed on sinuous ridges 

 close to the side margins. There are the usual two pairs of long sensory 

 hairs, bearing secondary hairs, and springing from well-marked pores. 

 Behind these there is another pair of sliort and more strongly " feathered " 

 hairs placed on a small circular plate, and there is another minute pair 

 placed in a line with the long sensorj' hairs. All of these hairs are enclosed 

 in an oblong area defined by two sub-cutaneous chiiinous rods, which run 

 forward to the front margin. Tiie five .segmented palpi Jfig. 23 b) are rather 

 short, with stout basal .segments, a few plumose spines; and tiiere is a stout 

 adpressed spine on the upper surface of fourth segment. The mandibles are 

 rather slender, chelae armed with a few minute teeth, a single hair on outer 

 surface. 



Legs decidedly sliort ; the three first pairs are of about equal length, last 

 pair the longest (130^). All segments with a few plumose hairs; si.xth 

 segment has also a bent spine on the dorsal side. 



Habitat. — Two specimens foimd between dry limestone Hakes in the 

 upiiermost Orange Lichen zone at Malahide (24th May, 1915). Apjiarently 

 this and the following species of Alicus occur only in the upper limit of the 

 Orange Lichen zone, and it is po.ssible they are not really denizens of the 

 intcrtidal area. 



Alicus latus sp. nov. (I'l. XXIII, fig. 24 a, c.) 



A species belonging to the sub-genus lAi/italicu-s, Derlese. Length, about 

 220/1 (not including mandibles) ; breadth, lOO/i. Colour, during life, a very 

 pale rose. The body (fig. 24 a) is robustly fonned and sub-quadrate. 

 Epidermis finely lined, and there is a very spare covering of plumose hairs 

 (fig. 24Ii cV which are Imiijer and more distinctly clavate towards end of body. 



