REVIEWS. 
* Whether we endea 
1 
T 
from ud group bends is looked upon a as the — perfect down 
YY het} 
753 
avor to arra 2 
genera of spiders in a continuous series, 
to the lowest, or vice-versa, or 
principle, we are soon met by the same dif- 
ficulties, ican 1 present shemecty, es, w "henever we endeavor to arrange in sucl 
el LAST A 
fi h 3 ith f H EH 
E Xe reasons for the or em " of arrangement we 
we hope, easily be seen if one casts one's eye $ ri 
à en h wil 
e accompanying diagram, whic 
view of oe SOSE founded « on ra agit, w Pied the families of the spiders piae by 
ng 
Fig. 177. 
gi hrynoidz. 
Opiliones. 
I. Orbitelarix IV. Territelariz. 
1. Epeiroide. 12. Theraphosoida, 
ir, Retitelariz. 13. Liphistioidx. 
2. Theridioidx, 14, Catadys soidz. 
3, Scytodoidze v. Laterigrad:e 
4, Enyoida 15. Thomisoidz. 
LI. Tubitelariz. vi. Citigradz. 
5. Urocteoi 16. Lycosoidze 
6. Omanoide. _ lr. Oxyopoid2 
7. Hersilionide. VII. Saltigradz. 
8. Agalenoidz 18. Myrmecionidz, 
Drassoidz. 19. ane ome 
10. Dysderoidæ, 2 Dinopoi 
ll, Filostatoidze. Ere solde 
2 Atto 
In a note, the author expresses his belief with Darwin, that ** propin- 
quity of descent is the hidden connection which our classifications at- 
work closes with a list of the genera of fossil spiders found in 
Europe, compared with living genera è 
AMER. NATURALIST, VOL. IV. 
