368 ON THE GEOGRAPHICAL DISTRIBUTION OF SPIDERS. [ Apr. 21. 
united at the close of the Miocene, descended into the latter area. 
If so, it presents a striking parallel to that of the Camel family, 
which was represented by many genera, now extinct, in North 
America during the Tertiaries, from the Lower Oligocene upwards, 
entered the Old World, where it is now represented by the Camels, 
and South America, where the Llamas still exist and extend 
principally along the mountains far to the south into Patagonia. 
Here again, as in other cases, the exact parallelism between 
the Mammalia cited and the Spiders fails apparently only on 
account of the survival of the latter and the extinction of the 
former in the area of their origin. 
To pursue this subject further, and take all the families and 
genera of Spiders into consideration, would require a special 
volume. Enough, however, has been said to show that the 
suggestions put forward to explain the distribution of other groups 
of animals apply also to the distribution of Spiders. 
Norre.—During the passage of these pages through the press, 
Simon has issued two papers (Bull. Mus. d’Hist. Nat. 1902, 
pp. 595-598; Ann. Soc, Ent. Belg. xlvii. pp. 21-23, 1903) 
containing descriptions of the following new genera of Mygalo- 
morphee :-— 
Dipluride.—Hntypesa, allied to the Australian Jeamatus: 
Madagascar. é 
Cyrtaucheniide.— Diadocyrtus, allied to the Ceylonese Scalido- 
gnathus; Genysochera, near Genysa: Madagascar. 
Ctenizidee,— Hebestatis, near Pachylomerus: California, 
Migide.—Calathotarsus, near the New-Zealand Migas: Chill. 
Pacilomigas, near Moggridgea: S. Africa. 
Barychelidee.—(Barycheli) Zophoryctes, allied to the Australian 
Trittame ; (Diplothele) Cestotrema, Acropholius: Mada- 
gascar. 
The chief feature of interest is the six new genera from Mada- 
gascar, two of which are related to Australian forms, one to a 
Ceylonese genus, one to a previously known Mascarene genus; the 
remaining two belonging to the Diplothele, hitherto represented 
by two genera, one from Madagascar, the other from Ceylon and 
India. Reference may also be made to the new Chilian genus of 
Migidee, which I have already mentioned (p. 365). 
