2 
mounted with a serrula, and that a bundle of pinnate bristles is 
found at the base of the movable finger, was Tulk as early as in 
1843 (1, p. 56). Besides he relates, that he has observed, that 
these organs are used for cleaning the maxillar chelae, and com- 
pares them with the comb of the Scorpions. J. C.-Schiddte in his 
admirable paper (1851, 2, p. 24, tab. I, 2, c) gives a rather good 
drawing of the antennae of Blothrus spelaeus Sch., but only a 
rather imperfect description, which however makes it evident, that 
he has seen both the serrulae and the flagellum. 
Blanchard's figure in "L'organisation etc.” (1853, 3) of 
Chelifer Geof. is imperfect, partly wrong and gives nothing of 
interest. Menge in his well known paper (1855, 4) gives draw- |. 
ings of the antennae of almost all the genera known to him, but 
on the one side his descriptions could not compare with those of 
Tulk and Schiddte, and on the other side he has not used the 
favourable opportunity for a fertile comparison between the chief 
forms. I do not think it worth the trouble to go into many details 
in my criticism, but will give a few examples, as an illustration 
and translate a striking quotation from Hansen's Danish paper (1884, 
10, p. 516). "But his, Menge's, text and espécially his first plate 
however make it evident, that he has observed many structural 
characters, the importance of which he is not able completely to 
understand or to use systematically, not having understood them 
thoroughly and having only half finished his task”. Menge has seen 
in Chelifer the lamina interior of the immovable finger and his figure 
(4, tab. I, fig. 15) is fairly good, but he writes (p. 9) "Bei Behandlung 
der Kiefer der Chelifer cancroides mit kausticher Kalildsung be- 
merke ich . . . zwischen beiden Fingern eine etwas gefaltete Haut 
(lamina interior) . . ., die warscheinlich von der losgelåsten Ober- 
haut herrtihren, denn im natirlichen Zustande sind sie nicht da”. 
His figure of the movable finger with the serrula and galea is not 
very similar to the real object. He has given (4, tab. I, fig. 12) 
a very good drawing of the antenna in Chthonius maculatus Menge, 
seen from the upper side, but he draws (fig. 13) two serrulae 
