33 



the palps is very Ihick and llial llic tactile hairs are always moving in all direc- 

 tions, to which their insertion in wide articular cups make them perfectly fitted. 



Dentation of Fingers. The fingers of the palps bear teeth along their 

 inner margin; the number as well as the shape of these teeth are very dissimilar 

 in the dilTerent genera, as well as in the species especially of the Chllwuiidue Hans., 

 as described thoroughly in Hansen's Danish paper (1884. 9. pp. 524-529) and later 

 on but much shorter by the same author in his "Organs and Characters" (1894. 

 49. p. 235). Several of the facts, set forth by this naturalist, as well as one of his 

 figures, are included in the following representation. The marginal teeth ditfer in a 

 considerable degree within the species of Chthonius C. K., but are as a rule large and 

 not numerous (cf. Balzan's figures on his tav. XVII (46.) and this paper fig. 11 below). 

 Both lingers of Blothrus spelaeus Schiødte bear marginal teeth almost from the base 

 to the tip; the teeth are found in great number viz. about 125 on the immovable 

 and about 90 on the movable finger; they are placed so close in 

 the basal half, where they are rounded, that the margin seems 

 to be crenated; in the distal half they are triangularly pointed 

 and further apart from each other. Both fingers of Roncus 

 alpinus L. K. are crenated from base to tip. In Obisiiim musco- 

 rum Leach, there is a great difi'erence between the armature 

 of the fingers (fig. 4a); the teeth of the movable finger are all 

 low and placed close to each other, while the immovable one 

 bears rather high, squarely truncate ones, in addition to a 

 number of basally broader, higher and conically pointed teeth, 

 which alternate with four or five of the others. The teeth of 

 Ideoronciis Siamensis n. sp. are poorly developed; behind the well 

 marked terminal hook of the movable finger three distinct 

 small pointed teeth occur, but the margin behind these is crenated and basalh' 

 undulated ; the teeth of the immovable finger are somewhat better marked, and 

 sometimes provided with a tiny secondary tooth in the middle. The movable finger 

 of (iarypns. irrugatus Sim. bears a close row of teeth, which are low and squarely 

 truncate proximally, but pointed distally; the teeth of the immovable finger are 

 pointed and placed more apart; inwards, i-emoved from the margin, a few accessor}- 

 ones are found; similar pointed accessory teeth to the niimber of twelve are placed 

 at the inner margin of the immovable finger in G. elegans Sim. from near the 

 base to a slight distance from the tip. Both fingers of Garypinus nobilis n. sp. are 

 provided with a marginal close row of teeth, those of the movable being squarely- 

 truncate in contrast to those of the immovable, which are at least distally trian- 

 gularly pointed. The marginal teeth of Chelifer Geof. are placed so close, that the 

 margins must be called crenated; in the immovable finger of Ch. granulntus CK. 

 for inst. they are pointed and directed backwards, in the movable only the terminal 

 are pointed, the rest are more squarely truncate. The teeth of Ch. nodosns Schrank 



iMg. 4 a. 

 Obisium muscoriim 

 Leacli. ['"iiigers of left 

 palp X fig. (Zool. Da- 

 nica 7, tab. VII, 6 g). 



I). K I). ViilensU. Sdsk. Skr 



. lUi'kkc. n:itiii-\ iflciisk. 0(> ninllieni. .-\tVI. III. ]. 



