Studies on Arthropoda. I. 



adorned with a number of much larger, scabrous and badly 

 denned granules or rather quite small, irregular tubercles. 



The "coni foetidi" are subtriangular (fig. i a), broader than 

 long, directed outwards and somewhat forwards; their anterior 

 margin is, seen from above, somewhat convex to a little from 

 the protruding terminal part, but seen from in front this shape 

 is seen to be due to the fact that each conus has its front subter- 

 minal part considerably excavated at the anterior end of the 

 two labial plates limiting the terminal orifice. 



Abdomen above with granules as on the major part of ce- 

 phalothorax. The seven anterior tergites divided by a sharp 

 furrow in the median line. On the ventral side (fig. i b) the 

 first furrow is curved forwards inside the spiracle and reaches 

 the margin of fourth coxa. The anal operculum is somewhat 

 vaulted, and seen partly from behind distinctly broader than 

 long. The whole ventral surface is densely and moderately 

 finely granulated, excepting the hollowed median part in the 

 male mentioned later on. 



Antennae (fig. 4 a) nearly as in 0. grossa. First joint has the 

 dorsal transverse rounded keel very conspicuous, and the upper 

 and most of the outer side of the free part of the joint is dis- 

 tinctly granulated. The hand of the chela is somewhat less 

 than three times as long as broad, smooth on the anterior side, 

 and not fully twice as long as the movable finger. 



Stomotheca conspicuously more than half as long again as 

 broad at the distal end (figs, i c and i d). 



Palps (fig. 4 b) about as long as the antennae measured from 

 the proximal margin of the transverse dorsal keel, in the main 

 as in 0. grossa, yet differing in having the trochanter a little more 

 slender and femur more oblique with both the upper and the 

 lower margin more convex. 



Legs very short and thick, considerably shorter than in 

 0. grossa. Lower surface of first pair of coxae not lower than 



