114 



ANNALS NEW YORK ACADEMY OF SCIENCES 



Taking into account all the genera except Prosthedina known from 

 the Porto Eican islands, we find that 22 (44 per cent, of the total) 

 are practically world wide in their distribution. This leaves 13 genera 

 which have a more or less restricted range in the eastern hemisphere. 

 Of these, 1 (T.7 per cent.) is found in central Europe, 6 (46.2 per cent.) 

 in the Mediterranean region, 11 (84.6 per cent.) in Africa, 3 (23.1 per 

 cent.) in Madagascar, 9 (69.2 per cent.) in continental Asia, 1 (T.7 per 

 cent.) in Ceylon, 3 (23.1 per cent.) in Japan, 3 (23.1 per cent.) in Philip- 

 pines, 4 (30.8 per cent.) in Malasia, 2 (15.4 per cent.) in the smaller 

 Pacific islands and 5 (38.5 per cent.) in Australia and :^^ew^ Zealand. 



The American distribution outside of Porto Eico of Porto Eican 

 genera is shown in Table III. It is worth noting in passing that of the 



Table III. — American disirihution of Porto Rican genera of spiders^ 





Not 

 on 

 main- 

 land 



S. A. 

 only 



C. A. 



only 



U. S. 

 only 



S. A. 

 C. A. 



9 



2 



3. 



1 



C. A. 



u. s. 



1 

 i 



2 



S. A. 

 U. S. 



S. A. 

 C. A. 



u. s. 



Total 



Not in other An- 

 tilles 



Lesser only 



Hisp. only 



Cuba only 



Less,, Hisp 



Less., Cuba.. . . . 



Cuba, Jam 



Less., Hisp., Cuba 



Less., Cuba, Jam. 



Hisp., Cuba, Jam. 



Lesser, Hisp., 

 Cuba, Jam .... 





1 



• 

 • 



1 



1 

 1 





1 



1 





1 



2 

 1 

 1 

 2 



1 

 o 



1 



9 

 2 



5 

 6 



5 



7 

 2 

 3 

 1 

 4 

 1 

 12 

 2 

 5 



8 



Total 



1 



o 

 O 



1 



1 



8 



1 



33 



50 



50 genera considered, 34 are in the Lesser Antilles and 38 in the Greater. 

 This would show a slightly greater affinity of the Porto Eican fauna with 

 the islands to the west. However, many of these are widely distributed 

 genera. It was seen al)ove that all of the five genera having more or 

 less restricted range and found also in the Old World are found in the 

 Lesser Antilles and only one in the islands to the west. Adding PJwr- 

 mictopus, Eugnatha. Widfila, Ayslia. and Stoidis — the only strictly Amer- 

 ican genera found in Porto Eico which are not wide-ranging on the 

 mainland — we find 8 in the Lesser Antilles and 6 in the islands to the 

 west. It must be concluded that, as far as genera of spiders are con- 



* Columns refer to the mainland and rows to the Antilles, 

 and "U. S." everything north of Mexico. 



"C. A." includes Mexico, 



