and curious Forms of Arachnida. 389 



very indistinct, one on either side of the first segment, under- 

 neath the fore extremity of the abdomen. 



The cephalothorax, united to the abdomen as above men- 

 tioned, slopes forward by an even curve slightly steeper than 

 that of the abdomen. 



The eyes are two in number, and seated on two blunt, 

 conical, tubercular eminences, one on either side of the upper 

 fore part of the caput ; they are rather small and indistinct, 

 being coloured like the surrounding surface. 



The legs, consisting of seven joints, are moderately long 

 and tolerably strong, their relative length being 4, 1, 3, 2, 

 the difference between 3 and 2 being exceedingly small, if any; 

 the basal joints are strong, those of the fourth pair inordi- 

 nately so, showing in this feature an affinity to Gonyleptes : 

 the tarsi end with a single, strong, curved, simple claw, and 

 are much longer than the metatarsi ; they are undivided, those 

 of the fourth pair having a conical protuberance at their base 

 on the upperside, and those of the first pair being strongly 

 protuberant or tumid on their undersides near the middle. 



The palpi are moderately long, slender, and destitute of 

 any terminal claw ; the radial is longer than the cubital, which 

 last is of the same length as the digital joint. 



The falces are long, three-jointed ; the basal joint short, 

 with a small eminence on the upperside : the second joint 

 strong and rather long, but not so long as the third ; it is of a 

 somewhat subcorneal form, with a small protuberance at its 

 base on the upperside, in contact with that on the first joint : 

 the terminal joint is long (longer than the two others together) ; 

 it tapers slightly towards the fore extremity, which terminates 

 with a small denticulate forciple. 



A single example of this curious and distinct species was 

 received from Mr. G. H. K. Thwaites, by whom it was sent 

 to me from Ceylon. 



Three species only (including the present) are yet known of 

 this genus : — one, C. duricorius, Joseph (from the Lueger 

 Cave in Carniola), upon which it was founded by Herr Gus- 

 tav Joseph ; another, 0. corsicus, Sim., from Corsica ; and 

 the present, from Ceylon. It appears to me questionable how 

 far the genus Stylocellus (Westwood) is distinct from Cyphoj)h- 

 thalmus. I have not yet had an opportunity of examining 

 S. sumatranus, Westw., the type of Stylocellus ; but, from the 

 description and figures of it (' Thesaurus Entomologicus Oxo- 

 niensis,' 1874, p. 200, pi. xxxvii. fig. 7), there would seem to 

 be no sufficiently distinctive characters for the foundation of a 

 separate genus. 



