300 Transactions of the Society. 



the appearance of each bearing an elongated cap or pilens, standing 

 outward and slightly forward. Interlamellar hairs short, rough, 

 rod-like. Legs very long and slender. The principal hairs npon 

 them slightly imbricated. 



Abdomen almost globular, without markings ; it bears two rows 

 of about eight strong, almost straight, black hairs on the noto- 

 gaster, which diminish in length from the anterior to the posterior; 

 there is also a row of hairs on the hind margin ; all these hairs 

 are slightly imbricated. There is a small blunt projection in front 

 of the insertion of each third leg, and a larger one to the anterior 

 angle of which this leg is articulated. The creature sometimes 

 carries its cast skins in a small shrunken lump on the back. 



Nijm'ph. 



Colour very light grey or straw, almost colourless, legs and 

 rostrum pinkish. Texture polished ; semi-transparent. 



Rostrum small, rostral hairs curved. Cephalothorax suddenly 

 enlarged behind the rostrum, round and arched. Pseudo-stigmatic 

 organs as in adult. Legs very long and slender. 



Al)domeu oval, smooth, without markings, anterior margin 

 roundish, posterior w'ith a bifid point, from each division of which 

 springs a long black hair, curved backward and outward. There 

 is a pair of similar hairs on the anterior margin, and two rows on 

 the notogaster. The cast skins are carried in the mode described 

 in the introductory part of this paper. 



I have only found the species in the thatch of a roof at the 

 Land's End, Cornwall. 



Hypocthonius lanatus sp. nov., plate VIL figs. 11, 11a. 



A species remarkable for its woolly hairs, its power of erecting 

 the spines on the back, and its singular mandible. 



Colour light yellow-ochre. Texture dull, reticulated, shghtly 

 pulverescent. 



Cephalothorax small, irregularly reticulated. Eostrum blunt ; 

 lamellae low rough ridges, extending forward. Eostral, lamellar, 

 and interlamellar hairs, also a pair of hairs at the anterior sides of 

 the pseudo-stigmata, and a pair between these and the lamellar- 

 hairs, all hke bunches of white wool. The rostral hairs are the 



