Hansen: on six species oe koenenla. 201 



of the figure was too small for a fuller representation of tlieni^ 

 and Ave did not mention them. — We had briefly described six 

 tactile hairs on the first pair of legs, Mr. Burner draws atten- 

 tion to a seventh one on the patella not mentioned l)y us (it is 

 wanting in our preparation of the legs), but he does not say that 

 it was seen by Grassi. And when he writes that only one tactile 

 hair »[nicht zwei, wie H. und S. angeben]» is present on the 

 fourth metatarsal joint, 1 may perhaps quote our text (p. 231): 

 »one on the anterior side of the fourth metatarsal (ninth) joint, 

 and one on the front side on the second tarsal . . . joint», and 

 scarcely any body will be able to discover more than one on 

 our fig. 12a.- — Finally his description and large drawing of 

 the chela must be mentioned. He says that the chela is figured 

 from above, but it is far from being vertically above, and the 

 result is several grave faults. The movable finger is not all 

 jointed to the hand as shown in the figure, in which 10 mm. of 

 its exterior margin is represented as covered by the lateral 

 wall of the hand, while in nature this margin is (luite free, 

 and the articulation similar to that in the chela of a scorpion 

 or a crab. He has completely overlooked the strong condylus,^ 

 and a long seta ; diclit vor dem Zahnfelde» is (juite incorrect: 

 in nature it stands even more distally on a small curious process, 

 which projects freely over and beyond the inner margin of the 

 immovable finger. He writes of tlie teeth that they »inserieren 

 auf einem breiten Feld, das etwas gekrümmt ist und sich sehr 

 deutlich von dem basalen und distalen Theil der Scherenarme 

 abhebt, wie es aus der Figur zu ersehen ist . But figure and 

 description are ecpially wrong: the teeth are in this and in all 

 the other species real processes without any vestige of insertion ; 

 his erroneous statement originates from the fact that the chela 

 was situated in an oblique position. The teeth on the chelte in 

 other Arthropods (Decapods, Scorpions, Chelonelhi, Opilionids) 

 are always processes without vestige of insertion, even when they 

 are proportionately much longer and more slender than in Koc- 

 uenia. He describes and figures a long fissure near the articu- 

 lation of the movable finger and supposes il to be a lyriform 

 organ; in a certain position one may think thai one sees this 

 fissure, but when the chela (which must be examined cut oft" and 



9 



