new Tropical and Southern Opiliones. 44o 



segment, the rest of tlie segments of the scute indicated bj a 

 transverse series of granules. Dorsal valve of penis distinctly 

 trilabiate, the protrusible portion (glans) elongate, simple, 

 not tridentate. 



Differing from Acuniontia in the backward position of the 

 ocular tubercle, in the presence of only a single pair of spines 

 on the scute, and in the structure of the penis, the dorsal 

 valve of which in Acumontia is bilabiate, the protrusible 

 glans being strongly tridentate. (PI. XI. tigs. 1-1 a, 2-2 a.) 



In many respects this genus seems to resemble Tricenonyx, 

 the iy\)Q of which {T. rapax) is unknown to me ; but it at 

 least differs in that the ocular tubercle does not rise from the 

 anterior border of the carapace, and the ocular and dorsal 

 spines are very much longer. Moreover, sketches of the 

 carapace of T. valdiviensis which Dr. Hansen has kindly sent 

 to me show that the latter species, although referred by 

 Sorensen to Tricenonyx^ has no distinct spines either on the 

 ocular tubercle or on the scutum. 



In the paper above quoted (P. Z. S. 1902, ii. pp. 403- 

 405) I have referred several species of Trisenonychidfe 

 to the genus Tricenonyx. One of them, namely, T. sub' 

 Icevis, is certainly congeneric with Nuncia sperata, Loman, 

 with which I have been able, through the kindness of 

 Dr. Loman, to compare it. The two differ in the form 

 of the maxillary processes of the second leg and in some 

 other specific features, but must be referred to the same 

 genus. Now the ocular tubercle in T. sublcevis occupies the 

 same position as the tubercle of T. valdiviensis, and differs 

 only in being lower and smooth. In neither does it rise 

 " ex ipso margine scuti,^' as is said to be the case in T. rapax 

 and as is the case in T. verrucosa, Poc. I am unable without 

 more material to settle how many genera are here involved, 

 provided all the species hitherto referred to Tricenonyx and 

 Nuncia represent more than one genus. 



Monoxyomma spinatum, sp. n. 

 (PI. XI. figs. 1-1 c.) 



cJ. — Colour a tolerably uniform reddish brown, lightly 

 clouded with black. 



Dorsal scute not thickly granular; a series of small 

 tubercles above its anterior border, some more on the sides 

 and above the margin of the thoracic portion; the abdominal 

 portion marked with transverse rows of segmentally-arranged 

 tubercles ; a single pair of longish spines rising near the 

 middle of the area between the posterior border of the scute 



