43 



pair ol" the legs ol' tiii; male ol' Ch. granulaliis C. K. is widened oiil towards the 

 lip, while that of Ch. Mortensenii n. s[). is deepest just in front of the base. 



VI. Arolium. 



The arolium is always provided wntli a stalk, gradually merging into the 

 sucking cup; the arolium is very long and slender in the Chihoniidae Hans., while it 

 is very much enlarged distally with short stalk in f. inst. Ideoroncus Siamensis n. sp., 

 but in neither case extending beyond the claws. It is a lillle longer than these, or 

 to speak more correctly it passes byond them in Ideoroncus laminatus n. sp. and 

 in a good many of the Garypidae Hans. f. inst. in Garypus irriigatiis Sim. (cf. Hansen 

 49. p. 233), Garypiniis nobilis n. sp. and Olpium Birmanicum n. sp. The two last 

 species have not only the arolium much longer than the claws, but have the stalk 

 bifurcate, so that each tarsus really bears two arolia or at least sucking cups; the 

 mentioned species have these structural features in common with Olpium biaroliatum 

 Tom., 0. Ortonedae Elling. (20. p. 161) and Garypinus dimidiatus L. K. (11. lab. IV, 

 fig. 17) (cf. PI. II, figs. 7 f-g, 8 f-g). 



VII. Claws. 



The claws of the Chelonethi do not as a rule provide structures of any 

 interest, the Cheliferinae Sim. excepted; they are sometimes more slender and less 

 curved, sometimes more clumsy and curved. In the Cheliferinae Sim. they vary in 

 three different ways. 



1) The lower margin of the anterior claws and sometimes of both claws are in 

 Chelifer peculiaris L. K. according to Daday (11. p. 177) provided with a kind 

 of comb "Kämmchen" (tab. IV, fig. 16). 



2) Tömösvary writes in his diagnosis of Ch. quadriinaculatus Tom. (1882. 40. 

 p. 197) "tarsis ungviculis duobus majoribus et præterea subtus pseudonychiis 

 duobus parvis armatis"; his figure (40. tab. II, flg. 3 uu) shows that each claw 

 bears near the base a slender forwards directed tooth, which is similar to a 

 moderately curved claw. 



3) While the structures, mentioned above, only occur in a single species, that, 

 which is to be described now, is characteristic to a whole group of species of 

 Ghelifer Geof., and consists in the armature of the claws with a more or less 

 developed anterior tooth. The occurrence of such a tooth was first mentioned 

 by Stecker in his Ectoceras Helferi Steck. (1875. 4. p. 515, taf. I, fig. 8), later on 

 by Tömösvary (1882. 40. tab. 1, fig. 24) in Ch. cancroides L. and by Hansen 

 (1884. y. p. 521), who observed their variations in several species as 'well as in 

 the two claws of the same tarsus; Ellingsen has lately (1901. 18. pp. 205-206) 

 dealt with this .subject and so has With (1905. 21. pp.100 and 115-116). 



The claws on the fourth pair of legs bear in both sexes in most species of 

 ''Lophochernes Sim." a more or less developed anterior tooth near the middle; this 

 tooth is wanting in C/i. lampropsalis L. K. is small in Ch. (jrannlatus C. K., well 



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