138 T. THORELL, 
marked pars cephalica, and whose 2™ pair of legs is not longer than the 
others — I have adopted the limitations of the genera given by L. KocH 
in his excellent work: Die Arachniden-familie der Drassiden. As aforesaid 
however, I exclude from this family Agræca, which in my opinion ought 
to be classed among the Agalenoide, although it has not, like the other 
genera of that family, three, but only two claws at the extremity of the 
tarsus, as also Storena (Conf. p. 107). Apostenus is not received as a se- 
parate genus in L. Kocm's work; neither is Thysa adduced in it, this last 
genus having been later made known to arachnologists. 
The want of a distinctly marked pars cephalica, together with the 
presence of only 2 tarsal claws, distinguishes in doubtful cases the spiders 
belonging to this family from the Agalenoidæ, into which they gradually 
pass, through e. g. Apostenus in the one family and greca in the other. 
From certain not distinctly laterigrade Zhomisoidıe (Misumena), the Dras- 
soid are easily distinguished by the relative length of the legs: the 2" 
pair being not longer than the others. All European Drassoidz have 8 eyes, 
except 7Aysa, which has but 6. As their eyes, of which the two central 
ones of the anterior row are never considerably larger than the rest, are, 
excepting in Zora, arranged in two transverse rows, they are thus easily 
distinguished from the Attoide. From certain other (exotic) Saltigrade 
(Otiothops, Myrmecium etc), which approach near the Drassoidz in the 
position of the eyes, the Drassoide are probably best distinguished by 
their eephalothorax being less high and broad anteriorly. Zora in the po- 
sition of the eyes approaches the Lycosoide, but not only the number and 
form of the claws, but also the double row of long, moveable spines under 
the tibiæ and metatarsi of the anterior legs, indicate for that spider a place 
in the vicinity of Apostenus among the Drassoidæ. 
The structure of the tarsal claws is very various. While in the Aga- 
lenoide they are gradually tapering, more equably curved, they are generally 
in the Drassoide of a more uniform breadth and straight at the base, and bent 
downwards only towards the extremity. Yet the genera, that in other re- 
spects approach the Agalenoidze, as Liocranum, also have claws more like 
theirs than those of the typical Drassoidæ. Even among these we find that 
large and strong species, e. g. Drassus 4-punctatus, Gnaphosa lucifuga, have 
claws gradually tapering from the base. The claw-teeth are in general less 
numerous and stouter than those of the Agalenoidæ. In the genera, which, 
at least in the structure of the claws, form the transition to the Thomisoidæ 
(Clubiona, Chiracanthium), these organs are very elongated and closely pec- 
tinated with many teeth. The palpal claw is often entirely toothless; fre- 
quently it has a few, rarely many teeth. 
