and curious Forms of Arachnida. 387 



the foremost of these is immediately behind the basal joints of 

 the fourth pair of legs, and is divided longitudinally by a 

 gaping incision ; the posterior one is much the largest, and 

 has several longitudinal incisions, of which the central one 

 appears to be the true orifice. This latter I take to be the 

 anus, the former the genital aperture. 



The parts of the mouth (falces, maxillas, palpi, and labium) 

 are exceedingly minute, and packed away within a large oval 

 cavity beneath the caput and close in front of the basal joints 

 of the first pair of legs. The details of the form and structure 

 of these parts are incapable of satisfactory observation by 

 even a lens of high magnifying-power ; there appears, how- 

 ever, to be a labium of considerable size, with two pointed 

 oval parts in front of it, which I take to be the forcipate ex- 

 tremities of the falces. No palpi could be discerned. 



The eyes are two in number, small, and widely separated 

 from each other, in a transverse line near the hinder part of 

 the caput, just above the basal joints of the first pair of legs. 



The legs are short and strong, and do not differ much in 

 their length ; those of the first pair appear to be rather the 

 longest, then those of the fourth pair, and the third pair 

 rather the shortest. The separate joints were (some of them 

 at least) scarcely discernible, owing to the spines and bristles 

 with which they are furnished being almost completely matted 

 with earthy particles ; but there appear to be six joints, of 

 which the terminal one is long, nearly cylindrical in form, 

 and undivided, but probably representing the ordinary tarsal 

 and metatarsal joints, and ending with three rather long and 

 somewhat S-curved diaphanous claws, placed side by side in 

 close contiguity to each other, besides numerous bristles and 

 hairs of a similar nature ; the uppersides of some of the other 

 joints are furnished with blunt spinous tubercles surmounted 

 by a curved bristle. 



A single example of this remarkable Arachnid was received 

 in 1874 from Otago, New Zealand, where it was found by 

 Capt. Hutton, who kindly sent it to me among some spiders 

 from the same locality. Although, for the reasons mentioned 

 above, I am unable to give a satisfactory description of some 

 important portions of structure, yet the mere position of the 

 mouth-parts, as well as other points in the external structure, 

 is amply sufficient for the characterization of a new and very 

 distinct genus of a new family of Phalangidea. 



It is with great pleasure that I confer upon this genus the 

 name of Professor Westwood, to whom the entomological 

 world is indebted for the knowledge of so many strange and 

 singular forms of the Articulata. 



